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HMP9 catalogue
Smart Compact Humidity and Temperature Probe HMP9 for rapidly changing environments
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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 The series is discontinued and has been replaced by a suitable Indigo520 barometric-pressure configuration with an application-specific HMP probe.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 PTU300 Combined Transmitter – Discontinued
The Vaisala PTU300 series was designed for applications requiring barometric pressure, relative humidity and temperature from one instrument. Typical uses included calibration-laboratory condition monitoring, meteorological systems, GPS meteorology, environmental measurement and compensation of precision optical or dimensional measurements.
Vaisala has discontinued the PTU300 series. New projects should use an appropriately configured Vaisala Indigo520 transmitter with barometric-pressure measurement and the HMP probe that matches the original PTU300 application.
Important replacement point: a standard humidity transmitter or HMP probe does not replace all three PTU300 measurements. The selected Indigo520 must include the required barometric-pressure capability, and the connected probe must suit the humidity, temperature, pressure and installation conditions.
PTU300 Replacement Selector
| Discontinued model | Former application | Current Vaisala direction | Product link |
|---|---|---|---|
| PTU301 | Wall-mounted humidity, temperature and barometric-pressure measurement | Indigo520 barometric-pressure configuration with HMP1 | View Vaisala HMP1 |
| PTU303 | General-purpose, duct or confined-space measurement | Indigo520 barometric-pressure configuration with HMP3 or HMP9 | View HMP3 or view HMP9 |
| PTU304 | High-pressure or vacuum applications up to the original model limits | Indigo520 barometric-pressure configuration with HMP4 | View Vaisala HMP4 |
| PTU305 | High-temperature processes | Indigo520 barometric-pressure configuration with HMP5 | View Vaisala HMP5 |
| PTU307 | Continuous high humidity and meteorological applications | Indigo520 barometric-pressure configuration with HMP7 | View Vaisala HMP7 |
| PTU308 | Pressurised pipelines with adjustable insertion | Indigo520 barometric-pressure configuration with HMP8 | View Vaisala HMP8 |
These mappings identify the closest current Vaisala product families; they do not guarantee a drop-in replacement. Review the complete PTU300 order code and installed arrangement before selecting the Indigo520, probe, adapter plate, cable and process accessories.
Indigo520 Barometric-Pressure Configuration
| Feature | Current Indigo520 barometric-pressure solution |
|---|---|
| Absolute-pressure range | 500 to 1100 hPa |
| Total pressure accuracy | Up to ±0.15 hPa under specified conditions |
| Probe capacity | Supports two detachable compatible probes simultaneously |
| Display | Large optional touchscreen display |
| Analogue outputs | Four configurable galvanically isolated outputs |
| Relays | Two configurable relays |
| Digital communication | Ethernet with web interface and Modbus TCP/IP |
| Enclosure | IP66 and NEMA 4 rated metal enclosure |
| PTU300 retrofit | Adapter-plate installation is available for applicable PTU300 replacement projects |
Pressure units can include hPa, mbar, kPa, Pa, inHg, mmH2O, mmHg, torr and psia. Confirm the required unit, scaling and output assignment during configuration.
Legacy PTU300 Specifications
| Specification | Former PTU300 capability |
|---|---|
| Measured parameters | Barometric pressure, relative humidity and temperature; model-dependent configuration |
| Pressure ranges | 50 to 1100 hPa or 500 to 1100 hPa, depending on model |
| Humidity range | Approximately 0 to 100 %RH according to the selected probe and conditions |
| Temperature range | Probe- and configuration-dependent |
| Pressure accuracy classes | Multiple accuracy classes and optional dual pressure sensors were available |
| Local display | Optional graphical display |
| Outputs | Analogue outputs and serial communication options according to configuration |
| Supply | Configuration-dependent DC or optional power-module arrangements |
Select the Correct HMP Probe
| Installation condition | Recommended probe | Main strength |
|---|---|---|
| Laboratory or indoor wall | HMP1 | Compact wall-mounted humidity and temperature measurement |
| General process or duct | HMP3 | General-purpose 12 mm probe with field-maintenance options |
| Very confined space | HMP9 | Compact 5 mm sensing head and fast response |
| High pressure or vacuum | HMP4 | Threaded installation for demanding pressure conditions |
| High process temperature | HMP5 | Long probe for processes up to +180 °C at the probe head |
| Continuous high humidity | HMP7 | Heated-probe arrangement for near-condensing environments |
| Pressurised pipeline | HMP8 | Adjustable insertion depth and pressure-tight process installation |
Information Needed for PTU300 Replacement
- Complete PTU300 model and order code
- Photographs of the transmitter, probe and installation
- Required pressure range, accuracy and engineering unit
- Humidity and temperature operating ranges
- Process pressure and gas composition where applicable
- Wall, duct, chamber, high-temperature or pipeline installation
- Existing analogue-output ranges and serial communication
- Relay, display, Ethernet and local-access requirements
- Supply voltage, cable length and wiring arrangement
- Available space and requirement for a PTU300 adapter plate
PTU300 Migration Checks
- Record the existing instrument order code, configuration and output scaling before disconnection.
- Confirm which of the three measurements are actually used by the receiving system.
- Select the Indigo520 barometric-pressure option and suitable HMP probe.
- Compare mechanical mounting, probe connection, insertion depth and environmental protection.
- Review power, cable entries, analogue channels, relays and communication protocols.
- Update PLC, data-acquisition or monitoring-system scaling where required.
- Commission all pressure, humidity and temperature channels against suitable references.
- Update drawings, calibration records, spare-parts lists and maintenance procedures.
Do not copy the old scaling blindly: PTU300 variants could have different pressure ranges, probes and outputs. Verify every active channel against the receiving controller and the new Indigo520 configuration during commissioning.
Typical Replacement Applications
- Calibration laboratories requiring environmental pressure, humidity and temperature records
- Semiconductor manufacturing and photolithography environments
- Laser interferometer wavelength compensation
- GPS meteorology and atmospheric measurement
- Professional meteorological installations
- Environmental monitoring and precision-measurement rooms
- Pressurised industrial processes requiring humidity and temperature measurement alongside barometric pressure
Calibration and Maintenance
A three-parameter installation requires a calibration plan covering barometric pressure, humidity and temperature. Calibration intervals should reflect the required uncertainty, operating environment, historical drift and quality-system requirements.
The detachable Indigo probes simplify service because a calibrated replacement probe can reduce measurement downtime. However, the barometric-pressure channel belongs to the selected transmitter configuration and must be included separately in the calibration and verification plan.
Vaisala PTU300 Replacement and Technical Support in Malaysia
Seacom Process Instruments supports existing Vaisala PTU300 installations in Malaysia and supplies current Indigo520 barometric-pressure configurations with suitable HMP humidity and temperature probes.
Our team can review the former PTU301, PTU303, PTU304, PTU305, PTU307 or PTU308 installation, select the appropriate Indigo520 and probe combination, check mounting and signal compatibility, and assist with commissioning and calibration planning.
Replacing a PTU300? Send us the complete order code, installation photographs, pressure range, humidity and temperature conditions, output scaling and receiving-system details. We will help identify a suitable current Vaisala configuration.
6 other products in the same category:
The Sato Baromex 7612-00 combines an easy-to-read analogue barometer with a digital thermometer for local atmospheric-pressure and room-temperature indication.
- Atmospheric-pressure range from 945 to 1045 hPa
- Dual pressure scale in hPa and mmHg
- Movable index pointer helps indicate pressure change
- Digital temperature display from 0 to 50 °C
- Rear °C/°F temperature-selection switch
- Compact wall mounting with the supplied bracket
- Powered by one AA battery
The Vaisala PTB330TS is a portable, battery-operated reference instrument for accurate barometric-pressure checks in the field and laboratory.
- PTB330 digital barometer with Vaisala BAROCAP® technology
- Handheld MI70 indicator with graphical display and data logging
- 500 to 1100 hPa barometric-pressure range
- Class A pressure accuracy for demanding reference measurements
- Optional HMP155 probe for humidity and temperature measurement
- Available with one, two or three pressure modules
- Supplied in a durable weatherproof transport case
The Vaisala PTB330 provides accurate, stable barometric-pressure measurement for professional meteorology, aviation, maritime systems, laboratories and demanding environmental applications.
- 500 to 1100 hPa or extended 50 to 1100 hPa pressure range
- Accuracy up to ±0.10 hPa at +20 °C
- Choice of one, two or three Vaisala BAROCAP® pressure sensors
- Optional graphical display with trends and measurement history
- RS-232 with optional RS-485, RS-422 and analogue outputs
- WMO pressure trend and tendency calculations
- IP66 housing without display for demanding installations
The Sato 7610-20 is a traditional brass aneroid barometer with an integrated glass thermometer for local atmospheric-pressure and temperature observation.
- Atmospheric-pressure range from 930 to 1070 hPa
- Secondary pressure scale from 700 to 800 mmHg
- Movable index pointer helps indicate pressure change
- Glass thermometer covering −10 to +50 °C
- Fully mechanical and requires no battery or external power
- Buffed brass case with a glass front
- Specified for installation up to 500 m altitude
The Vaisala PTB110 is a compact, low-power barometer for accurate atmospheric-pressure measurement and integration with data loggers, weather stations and environmental monitoring systems.
- Selectable barometric-pressure ranges from 500 to 1100 hPa
- Accuracy up to ±0.3 hPa at +20 °C
- 0–2.5 V, 0–5 V or frequency-output options
- Less than 4 mA current consumption
- External trigger supports power-saving operation
- Compact DIN-rail-mountable construction
The Sato NSII-BQ Sigma II Barograph records atmospheric-pressure changes on a rotating paper chart for visual review and filing.
- Catalogue number: 7237-00.
- Measuring range: 940–1045 hPa.
- Accuracy: ±1 hPa from 950–1040 hPa; ±2 hPa elsewhere within range.
- 7-day or 32-day recording according to the current manual.
- Powered by two C batteries.
- Includes 55 sheets of 7-day chart paper.