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 wall-mounted Vaisala GMW90 Series CARBOCAP® Carbon Dioxide, Temperature and Humidity Transmitters are especially suited for green building projects and demand controlled ventilation. The devices measure carbon dioxide and temperature and have an option for an additional humidity measurement.
The instruments come with a calibration certificate that meets traceability and compliance requirements. Traceability is easily maintained with field-exchangeable intelligent measurement modules. The transmitter can be blended into the interior design of the space where it is installed using the optional decorative cover.
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.
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 Probe HMP7 is designed for applications which involve constant high humidity or rapid changes in humidity such as drying and test chambers, combustion air and other humidifiers and meteorological measurements where measurement performance and chemical tolerance are essential. The HMP7 is part of the Indigo product family and compatible with Indigo500 and Indigo200 series transmitters and free Insight PC Software.
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 Combined Pressure, Humidity and Temperature Transmitter PTU300
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.
The Vaisala HMW90 Series has been complemented with four new models: TMW92 and TMW93 temperature transmitters for applications where only temperature measurement is needed and the configurable HMW90 and TMW90 for special scalings.
The HMW90 and TMW90 transmitters are available in four color options: standard white, black, grey and ivory.
Vaisala Origo10 Series Transmitters comprise a versatile selection of HVAC transmitters with exceptionally high reliability and excellent long-term stability of measurement. These modular, multipurpose devices are the ideal choice for buildings and critical spaces where precise and reliable control of HVAC systems are priorities.
The Vaisala HMT140 wireless data logger is designed for humidity, temperature and analog signal monitoring in warehouses, freezer and cryogenic farms, laboratories, blood banks and many other life science applications
The Vaisala HMT140 incorporates Vaisala HUMICAP® technology to measure relative humidity and temperature accurately and reliably. The Vaisala HUMICAP sensor is resistant to dust and most chemicals. Alternatively, the Vaisala HMT140 can connect to Resistance Temperature Detectors (RTDs), Voltage, Current and Contact sensors, making the Vaisala HMT140 the most versatile Vaisala data logger for life science applications.
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.
Humidity and Temperature Probe HMP1
for wall mounting humidity and temperature applications with exchangeable sensor
Vaisala HUMICAP® Humidity and Temperature Probe HMP1 is designed for measuring ambient measurement in indoor spaces. HMP1 can be directly connected to Indigo200 series transmitters to form a single wall-mounted unit. Its probe head and body are integrated to a single unit and it uses the miniature 5 mm (0.2 in) diameter HUMICAP® sensor and head for great stability and fast response time.
HMP1 is part of the Indigo family and is compatible with Indigo500 and Indigo200 series transmitters. It can be used with Vaisala Insight PC software for data visualization, easy probe configuration, and field calibration.
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