Industrial Humidity Measurement Instruments

Seacom supplies humidity meters, humidity transmitters, temperature and humidity probes, data loggers, recorders and calibration equipment for industrial, commercial and controlled-environment applications.

Reliable humidity measurement helps maintain product quality, process stability, occupant comfort and regulatory compliance. The correct instrument depends on the measurement range, temperature, pressure, installation method, required outputs and whether portable checks or continuous monitoring are needed.

Why accurate humidity measurement matters

  • Protect product quality - Control moisture-sensitive materials, production processes, storage areas and finished goods.
  • Improve process stability - Detect changing humidity conditions before they affect drying, coating, printing or manufacturing performance.
  • Reduce condensation risk - Monitor high-humidity and near-condensing environments with probes designed for demanding conditions.
  • Control static electricity - Maintain suitable humidity in electronics, cleanrooms, printing and other static-sensitive areas.
  • Support HVAC efficiency - Measure room, duct and outdoor humidity for reliable building and ventilation control.
  • Maintain compliant records - Use data loggers and continuous monitoring systems where traceable environmental records and alarms are required.

Choose the right humidity instrument

ApplicationRecommended productWhy it fits
Portable spot checks Vaisala HM40 Compact handheld meter for warehouses, HVAC checks, laboratories and general indoor measurements.
Portable diagnostics and field measurement Vaisala Indigo80 with HMP80 Portable measurement, data logging, diagnostics and field calibration with interchangeable smart probes.
Indoor spaces and wall mounting Vaisala HMP1 High-accuracy humidity and temperature probe for rooms and controlled indoor environments.
General industrial measurement Vaisala HMP3 Versatile probe for industrial HVAC, air-handling units, cleanrooms and environmental chambers.
HVAC ducts Vaisala HMD60 Robust duct-mounted transmitter for demanding HVAC and light-industrial installations.
Modern modular HVAC systems Vaisala Origo10 with XMP10 Modular transmitter and interchangeable probe platform for humidity, temperature and building automation.
High-temperature processes Vaisala HMP5 Long probe for ovens, dryers, kilns and other processes operating at elevated temperatures.
High humidity and near-condensing conditions Vaisala HMP7 Probe heating supports stable measurement in continuously humid and rapidly changing environments.
High pressure and vacuum Vaisala HMP4 Designed for compressed air, process gases and vacuum applications at demanding pressures.
Pressurised pipelines Vaisala HMP8 Adjustable insertion-depth probe for pipelines and other pressurised industrial processes.
Tight spaces and fast-changing conditions Vaisala HMP9 Miniature probe head for confined installations requiring fast response.
Hazardous areas Vaisala HMT370EX Intrinsically safe humidity and temperature measurement for areas containing flammable gases or dust.
GxP and continuous monitoring Vaisala VDL200 or RFL100 Wired or wireless data logging for viewLinc continuous monitoring, alarms and environmental records.
Standalone temperature and humidity logging Sato SK-L750 Series Practical data logging for storage, laboratories, production areas and routine environmental studies.
Visible paper-chart records Sato Sigma II Continuous temperature and humidity recording without a computer or network connection.
Humidity calibration and checking Vaisala HMK15 Portable saturated-salt reference for checking and adjusting compatible humidity probes and transmitters.

Humidity measurement solutions available

  • Handheld humidity meters - For portable inspection, spot checks, troubleshooting and field verification.
  • Humidity transmitters and probes - For permanent room, duct, outdoor, chamber, pipeline and process installations.
  • Temperature and humidity data loggers - For recording environmental conditions during storage, production, transport or validation work.
  • Continuous monitoring systems - For centralised data, alarms, audit trails and regulated facilities.
  • Thermohygrographs and chart recorders - For simple, visible paper or electronic records of temperature and relative humidity.
  • Humidity calibration equipment - For routine verification and adjustment of suitable probes and transmitters.

Common humidity monitoring applications

  • Pharmaceutical and life-science facilities - Warehouses, laboratories, cleanrooms, stability areas and controlled storage.
  • HVAC and building automation - Room, duct and outdoor measurement for comfort, ventilation and energy control.
  • Data centres and electronics - Environmental monitoring and static-control support for sensitive equipment.
  • Food, cold rooms and storage - Condition monitoring for raw materials, finished goods and temperature-sensitive products.
  • Industrial drying and environmental chambers - Humidity control across changing temperatures and demanding process conditions.
  • Compressed air and process gases - Pressure-rated measurement for pipelines, dryers and industrial gas systems.

Humidity Measurement for Cleanrooms and Pharmaceutical Facilities

For controlled environments, read our humidity and temperature sensor guide for cleanrooms and pharmaceutical facilities alongside the product specifications when planning your measurement system.

Need help selecting a humidity meter or transmitter?

Selection should be based on the expected humidity and temperature range, pressure, mounting arrangement, response time, output signal, data-recording requirements and calibration needs. Contact Seacom with your application details for product and model selection.

Email: seacom@seacom.com.my
WhatsApp: +60 16 208 0697

Humidity

Active filters

Vaisala Origo10

Vaisala Trasmitter Origo10 Series

The Vaisala Origo10 Series comprises modular HVAC transmitters with interchangeable probes for humidity, temperature, CO2 and dew-point measurement.

Available with analog, Modbus RTU and BACnet MS/TP outputs, wall or duct mounting, an optional display and an IP65-rated enclosure.

Vaisala HMP60

Vaisala HMP60 Humidity and Temperature Probe

The Vaisala HMP60 is a compact, durable and cost-effective humidity and temperature probe for equipment integration, data loggers, incubators, glove boxes, greenhouses and environmental monitoring systems.

It provides 0–100% RH and −40 °C to +60 °C measurement ranges, low power consumption, interchangeable Vaisala INTERCAP sensor and optional Modbus RTU communication.

Vaisala HMP110

Vaisala HMP110 High-Accuracy Humidity and Temperature Probe

The Vaisala HMP110 is a high-accuracy humidity and temperature probe designed for demanding equipment integration, environmental chambers, data loggers, incubators and controlled-environment applications.

It provides ±1.5% RH accuracy, a 0–100% RH range, −40 °C to +80 °C temperature measurement, a chemically resistant HUMICAP 180R sensor and analog or Modbus RTU output options.

Vaisala Humidity And Temperature Transmitter XMP10

Vaisala XMP10 Series Humidity and Temperature Probes

The Vaisala XMP10 Series comprises compact humidity and temperature probes offering accuracy levels up to ±1% RH and ±0.1 °C for demanding HVAC, data-centre and critical-environment applications.

The probes feature analog or Modbus RTU outputs, a standard M8 connector, an IP65-rated body and compatibility with Vaisala Origo10 modular HVAC transmitters.

Vaisala XMW85 CO2, Humidity and Temperature Modbus Transmitter

Vaisala XMW85 CO2, Humidity and Temperature Modbus Transmitter

The Vaisala XMW85 Series provides reliable indoor CO2, humidity and temperature measurement for demand-controlled ventilation, smart buildings and indoor air-quality monitoring.

All models support Modbus RTU over RS-485, with two-in-one and three-in-one measurement configurations and optional metric or non-metric displays.

Vaisala Temperature and Humidity Logger VDL200

Vaisala VDL200 PoE Data Logger for viewLinc CMS

The Vaisala VDL200 is a secure Power-over-Ethernet data logger for monitoring temperature, relative humidity, carbon dioxide and analog or Boolean inputs in controlled and GxP-regulated environments.

Designed for the Vaisala viewLinc Continuous Monitoring System, the VDL200 combines interchangeable smart probes, onboard memory and battery backup to provide reliable, gap-free environmental monitoring.

Vaisala Transmitter Indigo300

Vaisala Indigo300 Industrial Transmitter

The Vaisala Indigo300 is a rugged industrial transmitter for one Vaisala Indigo-compatible smart probe, providing local measurement display and up to three configurable analog outputs.

Its corrosion-resistant IP66 metal enclosure, flexible probe mounting and interchangeable probe design make Indigo300 suitable for humidity, temperature, dew point, CO2, moisture in oil and other demanding industrial measurements.

Vaisala Portable Humidity Meter With Remote Probe Indigo80

Vaisala Indigo80 Portable Meter with HMP80 DMP80 GMP80P

The Vaisala Indigo80 is a robust handheld indicator and data logger for industrial spot checks, process diagnostics, field calibration and measurement data analysis.

  • Connect and display measurements from up to two compatible probes
  • Measure humidity, temperature, dew point, carbon dioxide and other industrial parameters
  • Use with HMP80, DMP80 and GMP80P portable measurement probes
  • Record up to approximately 5.5 million real-time measurement values
Smart Humidity and Temperature Probe for high temperature HMP5

Vaisala HMP5 High-Temperature Humidity and Temperature Probe

The Vaisala HMP5 provides high-accuracy humidity and temperature measurement in ovens, dryers, kilns and other processes operating at temperatures up to +180 °C.

  • Humidity accuracy up to ±0.8% RH
  • Temperature accuracy up to ±0.1 °C
  • −70 to +180 °C probe-head measurement range
  • Standalone Modbus RTU or Vaisala Indigo transmitter operation
Smart Humidity and Temperature Probe for wall mounting HMP1

Vaisala HMP1 Wall-Mounted Humidity and Temperature Probe

The Vaisala HMP1 is a high-accuracy, interchangeable humidity and temperature probe for indoor spaces. It connects directly to an Indigo200 or Indigo300 transmitter to create a compact wall-mounted measurement system.

  • Humidity accuracy up to ±1.0% RH
  • Temperature accuracy up to ±0.2 °C
  • 0–100% RH and −40 to +60 °C measurement ranges
  • Modbus RTU and full Vaisala Indigo compatibility
Smart Humidity and Temperature Probe for high pressure HMP4

Vaisala HMP4 High-Pressure Humidity and Temperature Probe

The Vaisala HMP4 provides high-accuracy humidity and temperature measurement in compressed air, breathing air, industrial gases, vacuum systems and other processes operating at pressures up to 100 bar.

  • Operating pressure below 100 bar, including vacuum applications
  • Humidity accuracy up to ±0.8% RH
  • Temperature range from -70 °C to +180 °C
  • Standalone Modbus RTU or connection to an Indigo transmitter
Long Range Wireless Data Logger (CMS, FDA Approved) RFL100

Vaisala RFL100 Wireless Data Logger and AP10 Access Point

The Vaisala RFL100 uses secure, long-range VaiNet wireless technology to monitor temperature, relative humidity and carbon dioxide with the AP10 Access Point and viewLinc Continuous Monitoring System.

  • At least 50 m typical indoor wireless range
  • Up to 32 RFL100 data loggers per AP10
  • 30 days of local measurement memory
  • Approximately 18 months of battery operation for temperature and humidity monitoring
Sekonic Universal 6 channel Recorder SP-100 / SP100

Sekonic SP-100 Universal 6-Channel Chart Recorder

The Sekonic SP-100 is a portable universal 6-channel chart recorder for temperature and process signals.

  • Thermocouple, Pt100, DC voltage and 4–20 mA inputs.
  • Colour chart recording with configurable ranges and scaling.
  • Selectable chart speeds and recording formats.
  • Optional memory-card recording.

Discontinued model. Contact Seacom for availability, pricing and configuration details.

Dickson Touch Screen Data Logger TWP

DicksonOne TWP Touchscreen Temperature, Humidity and Differential Pressure Data Logger

The DicksonOne TWP provides local touchscreen viewing and cloud-connected monitoring of temperature, relative humidity or differential pressure. Its replaceable sensor system simplifies calibration and supports different monitoring applications using the same logger platform.

  • Large 8-inch LCD touchscreen
  • WiFi, Ethernet and Power over Ethernet connectivity
  • Approximately 1,000,000 sample-point backup capacity
  • Up to 70 hours of rechargeable battery backup
  • Replaceable temperature, humidity, thermocouple, RTD and differential-pressure sensors
  • Phone, text and email alarms through a DicksonOne subscription
Sato Thermohygrograph Mini Cube

Sato Mini-Cube 7008-10 Temperature and Humidity Chart Recorder

The Sato Mini-Cube 7008-10 records temperature and relative humidity on a seven-day paper chart for routine inspection and filing.

  • Temperature range: −15 to 40°C.
  • Humidity range: 5 to 100%RH, non-condensing.
  • Quartz-controlled seven-day chart rotation.
  • Replaceable cartridge pens.
  • Powered by one AA zinc-carbon battery.
  • Supplied with 55 sheets of seven-day chart paper.
Isuzu Thermohygrograph TH27R

Isuzu TH27R Quartz Thermohygrograph – Discontinued

The Isuzu TH27R paper temperature and humidity recorder has been discontinued and is no longer recommended for new installations. Seacom continues to support existing instruments with selected chart papers and recording pens.

  • Legacy temperature range from −20 to +50 °C
  • Relative-humidity range from 0 to 100 %RH
  • Quartz-driven cylindrical paper-chart recorder
  • Replacement TH27R chart papers and cartridge pens remain available
  • Existing recorder and chart details must be confirmed before ordering
  • Closest current substitute: Sato Sigma II NSII-Q thermohygrograph
Biogas Methane, Carbon Dioxide and Humidity Multigas Probe MGP261

Vaisala MGP261 Biogas Methane, Carbon Dioxide and Humidity Probe

The Vaisala MGP261 measures methane, carbon dioxide and humidity directly in raw biogas. Its in-situ design avoids a separate sampling system and helps operators monitor gas quality while protecting downstream equipment.

  • Measures CH4, CO2 and water vapour in one probe
  • 0–100 vol-% measurement range for methane and carbon dioxide
  • Humidity output as 0–25 vol-% H2O or −10 to +60 °C dew point
  • Heated optics help prevent condensation in wet biogas
  • Three isolated 4–20 mA outputs and RS-485 Modbus RTU
  • Ex-certified construction for direct installation in hazardous process areas

Ask Seacom about the MGP261

Sato SK-170GT WBGT Heat Stress Monitor

Sato SK-170GT WBGT Heat Stress Monitor

Sato SK-170GT WBGT Heat Stress Monitor is a portable all-in-one instrument for assessing heat stress in indoor and outdoor working environments.

It measures and displays the WBGT index, ambient temperature, globe temperature and relative humidity. Its built-in black globe detects radiant heat from direct sunlight, hot machinery and surrounding surfaces.

  • WBGT, temperature, globe temperature and humidity measurement
  • Selectable indoor and outdoor WBGT modes
  • Conforms to JIS B 7922 Class 2 based on ISO 7243
  • Adjustable WBGT alarm with approximately 75 dB buzzer
  • MAX/MIN, display hold and automatic power-off
  • Wind-speed compensation setting
  • Optional RS-232C connection for real-time PC monitoring
  • Tripod mounting hole and carrying case included
Temperature and Humidity Datalogger SK-L750 Series

Sato SK-L750 Series Temperature and Humidity Data Logger – SK-L751 / SK-L754

The Sato SK-L750 Series provides portable, configurable recording for temperature or temperature and humidity, with interchangeable probes, local display, USB communication and microSD data transfer.

  • SK-L751: two-channel temperature data logger
  • SK-L754: one temperature and one relative-humidity channel
  • 16,000 stored readings per channel
  • Four recording modes and 14 selectable logging intervals
  • USB real-time monitoring and CSV data export
  • AA-battery operation with optional AC-adapter power
Humidity Calibrator HMK15

Vaisala HMK15 Humidity Calibrator with Salt Chambers

The Vaisala HMK15 is a portable, power-free humidity calibrator for checking and adjusting humidity probes and transmitters with saturated salt references.

  • Suitable for laboratory work and on-site humidity checks
  • Supports 11, 33, 75, 85 and 97 %RH nominal reference points
  • Typically stabilises in 10 to 30 minutes when temperatures are equal
  • Certified, ready-dosed salt packages are available
  • Basic and universal chamber lids suit several probe diameters
  • No electrical power or external humidity generator required
Vaisala HMM100 Humidity Module for Environmental Chambers

Vaisala HMM100 Humidity Module for Environmental Chambers

The Vaisala HMM100 provides reliable humidity measurement and a configurable analog output for integration into environmental chambers and OEM equipment.

  • 0–100% RH measurement range
  • Relative-humidity or dew-point output
  • Current and voltage output options
  • Plastic or stainless-steel probes for temperatures up to +180 °C
CO2, Temperature and Humidity Transmitter Series GMW90

Vaisala GMW90 Series CO₂, Temperature and Humidity Transmitters

The Vaisala GMW90 Series provides stable wall-mounted carbon-dioxide and temperature measurement, with optional humidity, for demanding HVAC and building-automation applications.

  • Carbon-dioxide measurement from 0 to 5000 ppm
  • CO₂ accuracy up to ±(30 ppm + 2% of reading)
  • Temperature measurement from −5 to +55 °C
  • Optional HUMICAP® relative-humidity measurement from 0 to 95 %RH
  • Voltage, current or Modbus RTU output models
  • Display and CO₂ status-indicator options
  • Field-exchangeable calibrated measurement modules
  • Traceable three-point CO₂ calibration certificate included
Vaisala HMT370EX Intrinsically Safe Transmitter | Seacom

Vaisala HMT370EX & DMP370 Intrinsically Safe Humidity, Temperature and Dew Point Measurement

The Vaisala HMT370EX provides intrinsically safe humidity and temperature measurement with HMP-series probes. The new DMP370 configuration combines the HMT370EX transmitter with a DMP37X DRYCAP® probe for low-dew-point measurement in hazardous locations.

  • HMP probes for relative humidity and temperature
  • DMP370 dew-point measurement from −70 to +10 °C Td/f
  • Two two-wire 4–20 mA outputs
  • Certified configurations for hazardous gas and dust areas, up to Zone 0 / 20
  • Detachable probes and traceable calibration

DMP370 availability: Vaisala plans first deliveries for Q1 2027. Contact Seacom for configuration and project lead time.

Indigo200 Series Transmitters for Vaisala smart probes for Vaisala Smart Probes

Vaisala Indigo200 Series Transmitters

The Vaisala Indigo200 Series is the standard transmitter platform for one interchangeable Indigo-compatible smart probe, providing local display and practical automation-system connectivity.

  • Indigo201 with three analog outputs and two relays
  • Indigo202 with Modbus RTU and two relays
  • Colour display with numerical and graphical views
  • IP65 enclosure for industrial measurement applications
Vaisala HMP9

Vaisala HMP9 Compact Humidity and Temperature Probe

The Vaisala HMP9 combines a miniature 5 mm probe head with fast-response, high-accuracy humidity and temperature measurement for tight spaces and rapidly changing environments.

  • Humidity accuracy up to ±0.8% RH
  • Temperature accuracy up to ±0.1 °C
  • −40 to +120 °C probe-head measurement range
  • Standalone Modbus RTU or Vaisala Indigo transmitter operation
Vaisala HMP8

Vaisala HMP8 Humidity and Temperature Probe for Pressurised Pipelines

The Vaisala HMP8 provides high-accuracy humidity and temperature measurement in compressed air, refrigerant dryers and pressurised industrial processes up to 40 bar.

  • Humidity accuracy up to ±0.8% RH
  • Operating pressure from vacuum to 40 bar
  • Adjustable insertion depth with two probe lengths
  • Optional ball valve for insertion and removal under process conditions
Vaisala HMP7

Vaisala HMP7 High-Humidity and Temperature Probe

The Vaisala HMP7 is designed for continuously humid, rapidly changing and near-condensing environments. Probe heating helps prevent condensation while maintaining reliable process measurement.

  • Humidity accuracy up to ±0.8% RH
  • Probe heating for condensation prevention
  • −70 to +180 °C probe-head measurement range
  • Standalone Modbus RTU or Vaisala Indigo transmitter operation
Vaisala HMP3

Vaisala HMP3 General-Purpose Humidity and Temperature Probe

The Vaisala HMP3 is a high-accuracy, field-maintainable probe for industrial HVAC, air-handling units, cleanrooms, paint booths and environmental chambers.

  • Humidity accuracy up to ±0.8% RH
  • Temperature measurement from −40 to +120 °C
  • Field-replaceable filter and HUMICAP sensor option
  • Standalone Modbus RTU or Vaisala Indigo transmitter operation
Humidity and Temperature Transmitter (Meteorological Grade) HMP155

Vaisala HMP155 Meteorological Humidity and Temperature Probe

The Vaisala HMP155 provides stable humidity and temperature measurement for automatic weather stations, road-weather systems, airports, research sites and demanding outdoor monitoring.

  • Relative-humidity measurement from 0 to 100 %RH
  • Operating range from −80 to +60 °C
  • HMP155A with two analogue voltage outputs
  • HMP155D with RH voltage output and passive four-wire Pt100 temperature
  • HMP155E with RS-485 digital output
  • Optional warmed probe, chemical purge and additional temperature sensor
Vaisala Indigo510 Indigo520 Malaysia

Vaisala Indigo510 and Indigo520 Flagship Transmitters

The Vaisala Indigo500 Series provides flagship industrial measurement integration: choose Indigo510 for a simplified single-probe system or Indigo520 for full dual-probe capability.

  • Indigo510: one probe and two isolated analog outputs
  • Indigo520: two probes, four isolated outputs and two relays
  • Ethernet web interface and Modbus TCP communication
  • Rugged IP66 and NEMA 4 metal enclosure
Dickson Temperature & Humidity Round Chart Recorders

Dickson Temperature & Humidity Round Chart Recorders

Dickson round chart recorders provide a visible paper record of temperature or temperature and humidity for routine inspection and filing.

  • 3-inch SC3: compact temperature recorder
  • 4-inch SL4: temperature recorder with digital display
  • 8-inch KT8: temperature recording with sensor and channel options
  • 8-inch TH8: temperature and relative humidity recording
  • Replacement selection assistance for older KT6, TH6, KT8P, KT856 and TH8P models

Send your existing model number, measurement range and chart reference so we can help identify a suitable configuration.

Sato HIGHEST II Temperature and Humidity Meter

Sato HIGHEST II Temperature and Humidity Meter

The Sato HIGHEST II combines a dial hygrometer and digital thermometer for convenient local checks of room temperature and humidity.

  • Humidity range: 20 to 100% RH.
  • Temperature range: 0 to 50°C.
  • Human hair humidity sensor and thermistor temperature sensor.
  • 2% RH dial graduations and 0.1°C temperature display resolution.
  • 135 mm diameter body with wall-mount bracket.
  • Powered by one AA battery.
Hydrogen Peroxide H2O2, Humidity, And Temperature Probe HPP270

Vaisala HPP270 Series Vaporized Hydrogen Peroxide Probes

The Vaisala HPP270 Series provides stable, repeatable measurement for demanding vaporized hydrogen peroxide bio-decontamination processes.

  • HPP271 measures vaporized H₂O₂ concentration
  • HPP272 adds relative saturation, relative humidity and temperature
  • H₂O₂ measurement range from 0 to 2000 ppm
  • Accuracy of ±10 ppm or 5% of reading, whichever is greater
  • Two 4–20 mA outputs or RS-485 with Modbus RTU
  • IP65 stainless-steel construction with Vaisala PEROXCAP® technology
  • Compatible with Vaisala Indigo transmitters and Indigo80
Vaisala HMT360 Intrinsically Safe Humidity and Temperature Transmitter – Discontinued

Vaisala HMT360 Intrinsically Safe Humidity and Temperature Transmitter – Discontinued

The Vaisala HMT360 Series was an intrinsically safe transmitter platform for humidity, temperature and moisture measurement in hazardous areas. It is discontinued and replaced by the Vaisala HMT370EX with an application-specific probe.

  • HMT361 wall mounting → HMP371
  • HMT363 ducts and confined spaces → HMP373
  • HMT364 high pressure and vacuum → HMP374
  • HMT365 high temperature → HMP375
  • HMT367 high humidity → HMP377
  • HMT368 pressurised pipelines → HMP378
Vaisala HMT330 Humidity and Temperature Transmitter Series – Discontinued

Vaisala HMT330 Humidity and Temperature Transmitter Series – Discontinued

The Vaisala HMT330 Series was a flagship industrial transmitter platform for humidity, temperature and calculated moisture parameters. It is discontinued and replaced by an Indigo500 transmitter with the HMP probe selected for the application.

  • HMT331 wall mounting → HMP1 with Indigo500
  • HMT333 ducts and tight spaces → HMP3 or HMP9 with Indigo500
  • HMT334 high pressure and vacuum → HMP4 with Indigo500
  • HMT335 high temperature → HMP5 with Indigo500
  • HMT337 high humidity → HMP7 with Indigo500
  • HMT338 pressurised pipelines → HMP8 with Indigo500
Vaisala HMD80, HMW80 and HMS80 HVAC Humidity Transmitters

Vaisala HMD80, HMW80 and HMS80 HVAC Humidity Transmitters

The Vaisala HMDW80 Series provides cost-effective humidity and temperature measurement for routine HVAC and building-automation applications.

  • Humidity accuracy up to ±3% RH
  • Wall, duct and outdoor installation models
  • Current or voltage output configurations
  • Replaceable INTERCAP® humidity sensor
Vaisala HMW90 High-Accuracy Humidity and Temperature Transmitter

Vaisala HMW90 High-Accuracy Humidity and Temperature Transmitter

The Vaisala HMW90 Series provides high-accuracy humidity and temperature measurement for demanding indoor HVAC and controlled-environment applications.

  • Humidity accuracy up to ±1.7% RH
  • Analog or Modbus RTU output models
  • Optional display and configurable relay
  • Replaceable measurement module with calibration certificate
Vaisala HM70 Portable Humidity and Temperature Meter – Discontinued

Vaisala HM70 Portable Humidity and Temperature Meter – Discontinued

The Vaisala HM70 was a handheld meter for humidity and temperature spot checks, field measurements, data logging and verification of installed Vaisala instruments. It is discontinued and replaced by the Vaisala Indigo80 handheld indicator with an HMP80 probe.

  • Legacy MI70 handheld indicator with HMP75, HMP76 or HMP77 probe
  • Relative-humidity measurement from 0 to 100 %RH
  • Probe-dependent temperature measurement from −70 to +180 °C
  • Numerical and graphical display with portable data recording
  • Current replacement: Indigo80 with HMP80N or HMP80L
  • HMP80N for general measurements; HMP80L for extended temperature reach
Vaisala HMT120 and HMT130 Transmitters – Are Being Replaced by Origo10

Vaisala HMT120 and HMT130 Transmitters – Are Being Replaced by Origo10

The Vaisala HMT120 and HMT130 provide accurate, stable humidity and temperature measurement for cleanrooms, laboratories, data centres and demanding HVAC applications.

Product transition: HMT120/HMT130 are expected to be phased out. For new projects, the Vaisala Origo10 is the recommended replacement platform.

  • Humidity accuracy up to ±1.5% RH
  • HMT120 loop-powered 4–20 mA output
  • HMT130 voltage outputs, RS-485 and relay
  • Interchangeable fixed or remote measurement probe
  • Origo10 recommended for new installations
Vaisala PTU300 Pressure, Humidity and Temperature Transmitter – Discontinued

Vaisala PTU300 Pressure, Humidity and Temperature Transmitter – Discontinued

The Vaisala PTU300 combined barometric pressure, relative humidity and temperature in one transmitter. The series is discontinued and has been replaced by a suitable Indigo520 barometric-pressure configuration with an application-specific HMP probe.

  • Legacy three-in-one pressure, humidity and temperature transmitter
  • PTU301, PTU303, PTU304, PTU305, PTU307 and PTU308 variants
  • Former applications include laboratories, meteorology and semiconductor measurement
  • Current replacement platform: Indigo520 with barometric-pressure measurement
  • Humidity probe selected according to mounting and process conditions
  • Existing wiring, outputs and process connections require migration review
Vaisala HM40 Portable Humidity and Temperature Meter

Vaisala HM40 Portable Humidity and Temperature Meter

The compact Vaisala HM40 Series provides reliable humidity and temperature spot checks for HVAC, construction, warehouses, laboratories, museums and industrial applications.

  • Humidity accuracy up to ±1.5% RH
  • HM41, HM42, HM45 and HM46 probe configurations
  • Numeric, statistical and graphical trend displays
  • Traceable calibration certificate included
Vaisala HMM105 Digital Humidity Module for Environmental Chambers

Vaisala HMM105 Digital Humidity Module for Environmental Chambers

The Vaisala HMM105 provides reliable humidity measurement for integration into environmental chambers, incubators and OEM equipment.

  • 0–100% RH measurement range
  • I2C output for relative humidity or dew point
  • Detachable 12 mm probe with 300 mm flexible cable
  • Probe withstands +180 °C continuously and +200 °C temporarily
Vaisala HMT140 Wi-Fi Data Logger – Discontinued, Replaced by RFL100

Vaisala HMT140 Wi-Fi Data Logger – Discontinued, Replaced by RFL100

The Vaisala HMT140 Wi-Fi Data Logger has been discontinued and is no longer recommended for new monitoring systems.

  • Primary replacement: Vaisala RFL100 with AP10 VaiNet Access Point
  • Existing HMT140 installations can continue to be supported
  • Migration should be checked against the existing sensor and input type
  • Contact Seacom for replacement selection and viewLinc compatibility
Sato Mini-Alpha 7006-00 Temperature & Humidity Chart Recorder

Sato Mini-Alpha 7006-00 Temperature & Humidity Chart Recorder

The Sato Mini-Alpha 7006-00 is a compact thermohygrograph that records temperature and relative humidity on a seven-day paper chart.

  • Temperature range: −15 to 50°C.
  • Humidity range: 10–100% RH.
  • Quartz drum drive powered by one AA battery.
  • Desktop or wall-mounted use; approximately 0.8 kg.
  • Replaceable chart paper and cartridge pens.
Temperature And RH Data Logger (CMS, FDA Approved) DL2000

Vaisala DL2000 Temperature and Humidity Data Logger

The Vaisala DL2000 combines precision temperature and relative-humidity monitoring with optional analog or door-contact inputs for viewLinc systems.

  • Scheduled for future discontinuation; confirm availability before specifying
  • Current replacement platform: Vaisala VDL200 with suitable smart probes
  • Internal temperature and relative-humidity measurement
  • Optional current, voltage or Boolean input configurations
  • Onboard memory and a typical 10-year battery life
Sato Thermohygrograph Sigma II 7210-00 7211-00

Sato Sigma II NSII-Q Quartz Thermohygrograph

The Sato Sigma II NSII-Q continuously records temperature and relative humidity on an easy-to-read paper chart, providing a visible record without requiring a computer or network.

  • Temperature ranges of −15 to +40 °C or −10 to +50 °C
  • Relative-humidity range from 0 to 100 %RH, non-condensing
  • Selectable 1-day, 7-day or 32-day chart rotation
  • Transparent cover allows the chart to be viewed while closed
  • Battery-powered quartz clock with no external supply required
  • Suitable for warehouses, laboratories, clean areas and production rooms
Sekonic ST-50M Digital Thermohygrograph — Discontinued

Sekonic ST-50M Digital Thermohygrograph — Discontinued

The Sekonic ST-50M digital thermohygrograph is discontinued. It combined temperature and humidity measurement with paper chart recording and SD-card storage.

  • Paper records: consider the Sato Sigma II NSII-Q.
  • Electronic records: consider the Sato SK-L754 temperature and humidity data logger.
  • Centralised monitoring and alarms: consider Vaisala RFL100, AP10 and viewLinc.

Contact Seacom to match the replacement to your recording requirements. Features and accessories differ from the original ST-50M.

Sekonic ST-50A Digital Temperature and Humidity Chart Recorder

Sekonic ST-50A Digital Temperature and Humidity Chart Recorder

The Sekonic ST-50A displays temperature and relative humidity and records both on a continuous paper chart.

  • Electronic temperature and humidity sensing with LCD display.
  • Optional extension cables for remote sensor placement.
  • Battery operation or a suitable external DC supply.
  • Desktop or wall-mounted installation.

Being phased out: confirm availability before ordering. Alternatives include the Sato Sigma II for paper records, Sato SK-L754 for electronic logging and Vaisala viewLinc for centralised monitoring.

Sato SK-L200TH II Temperature & Humidity Data Logger — Discontinued

Sato SK-L200TH II Temperature & Humidity Data Logger — Discontinued

The Sato SK-L200TH II temperature and humidity data logger is discontinued. The replacement is the Sato SK-L754, selected with a compatible temperature and humidity probe.

  • Electronic temperature and humidity recording.
  • 16,000 stored readings per channel.
  • USB communication and microSD data transfer.
  • Choice of plug-in or cabled probe, purchased separately.

View the Sato SK-L754 replacement and probe options.

back to top