Vaisala HMT360 humidity and temperature transmitter is designed for use in potentially explosive atmospheres. The electronics are designed so that the transmitter is intrinsically safe. The whole transmitter can be installed directly into an explosive area, even into areas classified as having a constant risk of explosion (Zone 0). HMT360 fulfils all requirements of current standards. The microprocessor-based HMT360 is easy to install, maintain and calibrate due to its modular structure. The interchangeable probes are easy to remove and enable on-site calibration. They make the HMT360 series versatile and ensure its suitability for almost any application
Also suitable for measuring water activity of Jet Fuel

| Model | HMT368F Transmitter and Probe for Moisture in Oil Measurements HMT360F Transmitter Unit for Moisture in Oil Measurements HMT368H Transmitter and Probe for Jet Fuel Measurements HMT360H Transmitter Unit for Jet Fuel Measurements HMT362N Transmitter with probe for Natural Gas with flanged probe HMT364N Transmitter with probe for Natural Gas in high pressure HMT368N Transmitter and probe for Natural Gas pipeline installation HMT360N Transmitter Unit for Natural Gas measurments HMP362 Flanged probe |
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| Measurement Range | Humidity: 0 - 100% rH Temperature:
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| Sensor | Humidity: Vaisala HUMICAP 180L2 Temperature: PT100 RTD |
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| Accuracy at 20ºC | Humidity: ±1.0%rH (0 - 90%rH), ±2.0%rH (90 - 100%rH) Temperature: ±0.1ºC |
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| Power supply | 10-28V | |
| Output | 4-20mA, RS-232 | |
| Mechanics | Protection: IP65 (NEMA 4) Complies with classifications from PTB (CENELEC, Europe), FM (USA), CSA (Canada), TestSafe (Australia), TIIS (Japan) and PCEC (China) |
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| Remarks | HMT361 for wall mounting HMT363 for duct mounting and tight spaces HMT364 for high pressures up to 100 bar and vacuum conditions HMT365 for high temperatures HMT367 Transmitter with Vapor Tight Probe HMT368 for pressurized pipelines up to 40 bar |
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The intrinsically safe Vaisala HMT370EX is the ideal solution for use in hazardous areas up to zone 0 and 20. In addition to measuring relative humidity and temperature, the transmitter outputs also other humidity parameters: dew point temperature, wet-bulb temperature, absolute humidity, mixing ratio, water concentration, water mass fraction, water vapor pressure, and enthalpy. Special models for moisture in oil and jet fuel measurements are available.
Typical applications include fuel storage tanks, manufacturing of chemicals, pharmaceuticals and food, biogas production' paint booths and any other industry or process where intrinsically safe humidity or moisture in oil measurement is required.
This next-generation HMT370EX transmitter replaces the long-running HMT360 transmitter series.
The HMT370EX offers several probe options for different applications:
Models for measuring moisture in oil and jet fuel:
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The Vaisala HUMICAP® Digital Humidity Module HMM105 is an open frame module for integration into environmental chambers.
The modules provide an I2C output>for relative humidity (RH) or dew point (Td). The module consists of a detachable probe assembly – a probe head with M10x1 threads and a flex cable – and the module circuit board. The probe assembly is 30 cm in length.
The module incorporates the Vaisala HUMICAP® 180R sensor which ensures excellent measurement accuracy.
The Vaisala HUMICAP® Humidity Module HMM100 is an open frame module for integration into environmental chambers. The modules provide a single analog output channel for relative humidity (RH) or dew point (Td).
Practically maintenance-free HMM100 is an open frame module for integration into environmental chambers. Excellent measurement accuracy with Vaisala HUMICAP® 180R sensor.
Vaisala Humidity and Temperature transmitter XMW85 is designed to meet the needs of modern building automation systems. It integrates seamlessly with ventilation control systems via Modbus RTU communication, which ensures easy installation and reliable communication. By optimizing ventilation and maintaining ideal indoor air conditions, the XMW85 series transmitters enable smart ventilation strategies that improve energy efficiency, and maintain a healthy and comfortable indoor environment across different building spacesThe versatile Vaisala HMDW80 series includes transmitters for wall and duct mounting, IP65-classified transmitters for humid areas, and transmitters with a radiation shield for outdoor use. It also includes temperature-only transmitters and transmitters with an optional display.
Calculated humidity parameters –dew point temperature, wet bulb temperature, and enthalpy are also available.
Vaisala HMT330 series are easy-to-use transmitters for demanding industrial and air conditioning applications. The transmitters measure relative humidity and temperature and from these calculate dew point and wet bulb temperature, mixing ratio and absolute humidity.
They can be configured to the customer's requirements on the production line, but configuration and parameters can also be set by the user. The series has both analogue and serial outputs as well as several options: different cable lengths, power supply modules and serial interface modules as well as a local display.
Humidity and Temperature Probe HMP155
Superior Accuracy for Harshest Environments
Vaisala Humidity and Temperature Probe HMP155 provides reliable humidity and temperature measurement. It is designed especially for demanding outdoor applications.
Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMD110, HMW110, HMS110 series measure relative humidity and temperature in multiple HVAC applications.
The series includes transmitters for duct mounting HMD110, IP65-classified wall transmitters, and outdoor transmitters with integrated radiation shieldsHMS110.
Vaisala HMD110, HMW110, HMS110 series transmitters are equipped with trusted HUMICAP® 180R sensors. They are individually adjusted and delivered with a calibration certificate. The factory calibration is traceable to NIST.
Transmitters can be field-calibrated using either an HM70 Hand-Held Humidity and Temperature Meter, or a PC connection.
Vaisala Humidity and Temperature Module HMM170 is a robust open frame transmitter for integration into environmental chambers that need accurate and reliable measurement even in demanding conditions including vacuum or high pressure.
The module is built to last for years and it is easy to integrate into the chamber and the circuit board. Both digital and three configurable analog output channels are available, ensuring compatibility for most chamber types. In addition to relative humidity and temperature, dew point and other calculated parameters are available.
The HMM170 provides a digital RS-485/Modbus RTU output and three freely configurable analog output channels. The module provides relative humidity, temperature, dew point, and other calculated parameters.
for smart control of biogas quality
Get more value out of waste by improved decision-making, and by reducing your operating costs. Vaisala CARBOCAP® MGP261 Multigas Probe for Methane, Carbon Dioxide and Humidity helps in improving your process and in protecting the Combined Heat and Power (CHP) engine. The MGP261 probe is compact in size, Ex certified, and can be installed directly into the gas line without the need for sample treatment.
>The measurement probe is suitable for applications such as anaerobic digestion of landfill, industrial and municipal waste, wastewater treatment, CHP engine monitoring, as well as active carbon filter monitoring.
Vaisala Indigo300 Transmitter is a host device for displaying measurement values from Vaisala Indigo-compatible probes and/or transmitting them to automation systems through analog signals.
The current loop-powered, two-wire transmitter is called the Vaisala HMT120 and the three-wire transmitter - with voltage and serial line outputs as well as a relay - is called the Vaisala HMT130. The new transmitters utilize the fully interchangeable HMP110 probe.
The transmitters replace with enhanced features the currently very successful HMT100 transmitters. The HMT120 and HMT130 transmitters are especially designed for cleanroom continuous monitoring systems and are very easy to clean. The housing is also durable for continuous exposure of cleanroom cleaning agents and the interchangeable measurement probe is equipped with the latest humidity sensor technology, the HUMICAP180R.
The Vaisala Indigo, Indigo 510, Indigo 520 transmitter has 4 analog channels that can be configured to mA or voltage type and 2 configurable relays. The Vaisala Indigo510 has 2 analog channels. Any of the output parameters from the connected probes can be assigned to control the analog channels and relays. Digital output protocol is Modbus TCP/IP over Ethernet. Besides Modbus TCP/IP, the transmitter's Ethernet connection provides a web interface and cyber-security that meets the modern standards
The touchscreen display provides local data visualization and easy access to probe configuration. The transmitter also extends the options for connectivity, supply voltage and wiring, compared to using just a smart probe. It also provides mechanical support when wall-mount probe installation is preferred. Rugged IP66- and NEMA4-rated metal enclosure ensures reliable performance even in the harshest conditions.
The Indigo-compatible smart probes include humidity probes (HMP1, HMP3, HMP4, HMP5, HMP7, HMP8 and HMP9), dew point probes (DMP5, DMP6, DMP7 and DMP8), carbon dioxide probes (GMP251 and GMP252), moisture in oil probe (MMP8), temperature probe (TMP1), and vaporized hydrogen peroxide probes (HPP270). The Indigo520 is also compatible with MHT410 Moisture, Hydrogen and Temperature Transmitter for power transformer online monitoring
The Indigo520 dual-probe support allows simultaneous measurements with two Vaisala Indigo-compatible probes for humidity, temperature, dew point temperature, carbon dioxide, vaporized hydrogen peroxide, and moisture in oil measurements. If you need just one probe, the Indigo510 is an ideal choice.
Vaisala HUMICAP® Humidity and Temperature Probe HMP8 is designed for pressurized applications in compressed air systems, refrigerant dryers, and other pressurized industrial applications where easy insertion and removal of the probe and adjustable installation depth into the pipeline are needed.
The HMP8 is part of the Indigo product family and compatible with Indigo500 and Indigo200 series transmitters and free Insight PC Software.
Vaisala HMT360 humidity and temperature transmitter is designed for use in potentially explosive atmospheres. The electronics are designed so that the transmitter is intrinsically safe. The whole transmitter can be installed directly into an explosive area, even into areas classified as having a constant risk of explosion (Zone 0). HMT360 fulfils all requirements of current standards. The microprocessor-based HMT360 is easy to install, maintain and calibrate due to its modular structure. The interchangeable probes are easy to remove and enable on-site calibration. They make the HMT360 series versatile and ensure its suitability for almost any application
Also suitable for measuring water activity of Jet Fuel