VAISALA Products





HMP60 Humidity and Temperature Probe
for Volume Applications

HMP60 is a simple, durable and cost-effective humidity probe suitable for volume applications, integration into other manufacturers’ equipment, incubators, glove boxes, greenhouses, fermentation chambers and data loggers.


・Measurement range: 0 to 100 %RH; -40 to +60°C
・Cable detachable with standard M8 connector
・Rugged metal housing
・Interchangeable Vaisala INTERCAP® Sensor
・Optional RS485 digital output

・Optional dew point output

・Low power consumption: The HMP60 is suitable for battery-powered applications because of its very low current consumption.
Easy Installation: The probe cable has a screw-on quick connector for easy installation.
・Recalibration Not Needed: The sensor can simply be replaced, also in the field.


Humidity and Temperature Probe HMP110
with ±1.5%RH Accuracy for Demanding Volume Applications

The Vaisala HUMICAP® Humidity and Temperature Probe HMP110 is a trouble-free and cost-effective humidity transmitter with high accuracy and good stability. The power consumption is low and it has fast startup for battery-powered applications. A rugged polyurethane filled stainless steel body survives also in rough conditions. All models come with a calibration certificate. This probe is suitable for volume applications or integration into other manufacturers’ equipment and also for glove boxes, greenhouses, fermentation and stability chambers, data loggers, and incubators.

Three models available:

  • Humidity and temperature probe
  • Temperature only probe with an RS485 interface supporting Modbus RTU protocol
  • Temperature only probe with voltage outputs

The miniature size HMP110 has a measurement range of 0 to 100 %RH; -40 to +80°C and the probe incorporates the latest generation HUMICAP® 180R sensor for best stability and high chemical tolerance. The HMP110 has an IP65-classified metal housing. 



・Miniature-size humidity transmitter
・Low power consumption and fast startup for battery powered applications
・Measurement range: 0 to 100 %RH; -40 to +80°C
・Cable detachable with standard M8 quick connector
・Reliable: Latest generation HUMICAP® 180R sensor for best stability and high chemical tolerance. IP65 metal housing.
 Optional RS485 digital output
・Temperature only version HMP110T also available
・Optional dew point calculation

・Comes with a certificate

Several outputs: Three standard voltage outputs are available.

Easy maintenance: HMP110R replacement probe service available for easy maintenance.

・Easy installation: The probe cable has a screw-on quick connector for easy installation.


Handheld Humidity and Temperature Meter HM70
for Demanding Spot-Checking Applications

Vaisala HUMICAP® HM70 Handheld is designed for demanding humidity measurement in spot-checking applications. It is also ideal for field checking and calibration of Vaisala’s fixed humidity instruments.

The HM70 includes an MI70 indicator and an optional probe depending on the application.

  • HMP75 with standard plastic grid
  • HMP75B (chemical purge and sensor preheating)
  • HMP76 with standard sintered bronze filter
  • HMP76B (chemical purge and sensor preheating)
  • HMP77 with standard plastic grid and stainless steel netting
  • HMP77B (chemical purge and sensor preheating)

The optional MI70 Link Windows® software in combination with a USB connection cable is used to transfer logged data and real time measurement data from the HM70 to a PC.


・RH measurement range 0…100 % RH
・3 probes, temperature measurement ranges between -70 and +180 °C
・Multiprobe operation; dewpoint and CO2 probes can also be connected
・Displays various humidity parameters
・Sensor preheat and chemical purge options for demanding conditions

・Traceable calibration (certificate included)

・Easy data logging: Data can be logged, and transferred to a PC via MI70 Link software.
Rugged and reliable: Suitable also for use in extreme conditions.



HUMICAP® Humidity and Temperature Probe HMP155

Vaisala’s HUMICAP® HMP155 is a plug-and-play sensor that has excellent stability and withstands well even in harsh environments. The probe provides reliable humidity and temperature measurement and it is designed specifically for demanding outdoor applications.


・Vaisala HUMICAP®180R sensor – superior long-term stability
・Optional warmed humidity probe and chemical purge
・USB-connection cable for service use
・Fits in DTR13 and DTR502/503 radiation shields and also in the Stevenson screen
・Weather-proof housing IP66
・Optional fast temperature probe
・Different output possibilities: voltage, RS-485, resistive Pt100

・Applications: meteorology, aviation and road weather, instrumentation

・Long-term stability and easy maintenance: The probe can be calibrated using a PC with a USB cable, with push buttons, or with the MI70 indicator.
Durability: Protected from default with a sintered Teflon filter, the HMP155 has the maximum build-in protection against liquid water, dust, and dirt.
・Warmed probe: The sensor head is warmed continuously to keep the humidity level inside it below the ambient level, which reduces the risk of condensation forming on the probe.


Radiation Shield Series DTR500
for Maritime Observations transmitters and probes

Naturally ventilated Shield Series DTR500 are solar radiation and precipitation shields supporting humidity probe installations in outdoor applications. Shield protects temperature and humidity probes from scattered, as well as, direct solar radiation and rain.



・Protects temperature and humidity probes from scattered, as well as, direct solar radiation and rain
・Choice of shields and mounting accessories
・Easy to install on a vertical pole, horizontal beam or flat surface
Suitable for a wide range of applications
・Naturally ventilated


CO₂ Probe GMP343
for Demanding Measurements

The Vaisala CARBOCAP® Carbon Dioxide Probe GMP343 is an accurate and rugged probe-type instrument for ecological measurements. Typical applications include CO2 soil respiration, ambient CO2 monitoring, plant growth chambers, and OEM applications. The GMP343 incorporates a single-beam, dual-wavelength CO2 measurement with no moving parts.

The GMP343 can output both numerically filtered and raw measurement data and it can also compensate the measurement with an internal temperature measurement and user-set relative humidity, pressure and oxygen values. In combination with the handheld GM70, the GMP343 provides a tool for accurate in-situ measurement. The GM70 can be used as a display, communication and data logging device.

Each GMP343 is calibrated using ±0.5 % accurate gases at 0 ppm, 200 ppm, 370 ppm, 600 ppm, 1000 ppm, 4000 ppm and 2 %. Calibration is also done at temperature points of -30 °C, 0 °C, 25 °C and 50 °C. If needed, the customer can re-calibrate the instrument using the multipoint calibration (MPC) feature allowing up to 8 user-defined calibration points.



・Excellent accuracy and stability
・Vaisala CARBOCAP® Sensor, a silicon-based non-dispersive infrared (NDIR) sensor
・A single-beam, dual-wavelength CO2 measurement with no moving parts
・Compensation options for temperature, pressure, humidity and oxygen
・Wide operating temperature and humidity ranges
・Diffusion and flow-through models
・For harsh environments

・Low operating costs: The GMP343 is a small, lightweight but rugged diffusion-aspirated or flow-through CO2 probe with low power consumption and heat emission designed for use in harsh
                                           environments, especially outdoors, which reduces the operating costs.
Stable and reliable: The GMP343 has good stability both in terms of time, and temperature and also in a good stability flow.



Handheld CO₂ Meter GM70
for Spot-Checking Applications

The Vaisala CARBOCAP® Hand-held Carbon Dioxide Meter GM70 measures volume concentration of CO2 in the units of ppm or %. It is a user-friendly meter for demanding spot measurements in laboratories, greenhouses, mushroom farms, and for ensuring CO2 safety during soft drink bottling processes. The measurement accuracy is not affected by dust, water vapor or most chemicals. The meter can also be used in HVAC and industrial applications, and as a tool for checking Vaisala’s fixed CO2 instruments. Also the GMW90  can also be adjusted by using the GM70 meter.

The optional GM70 pump enables pump-aspirated sampling from difficult to access areas, such as incubators and chambers. Two sampling methods are available: the handle is for handheld diffusion sampling and the GM70 pump enables pump-aspirated sampling from locations difficult to access otherwise.

The handheld meter has two probe inputs; Vaisala’s relative humidity and dew point probes can also be used simultaneously with the CO2 measurement. The GM70 has a short warm-up time and is ready for use almost immediately. It has a menu-based interface, a graphical LCD display and data logging capability.

The optional MI70 Link Windows® software in combination with a USB connection cable is used to transfer logged data and real time measurement data from the GM70 to a PC.


・Two optional sampling methods: diffusion or pump aspiration
・Numerical and graphical display of measurements
・Data can be logged and transferred to PC via MI70 Link software
・Multi-probe operation; dew point and relative humidity probes can also be connected
・Suitable for field checking of fixed CO2 instruments
・Short warm-up time

・Wide selection of measurement ranges

・User-friendly: The GM70 has a numerical and a graphical display for easy viewing of the data with a logging capability. The user interface is available in nine languages.
Wide measurement ranges: The GM70 allows you to choose the measuring range that best suits your application.
・Easy sampling: The GM70 incorporates two sampling methods: the handle is for hand-held diffusion sampling and the pump enables pump-aspirated sampling from locations difficult to access
        by other means.

CO₂ Probe GMP251
for %-level measurements in life science incubators, cold storage facilities and all demanding applications


・Measurement range 0~20 %CO₂
・Intelligent, stand-alone probe with analog (V, mA) and digital (RS485) outputs
・Superior long-term stability with the 2nd-gen proprietary CARBOCAP® technology
・Wide operating temperature range -40~+60 °C
・IP65 classified housing
・Full temperature and pressure compensations
・Integrated temperature measurement for CO₂ compensation purposes
Compensations for background gases, O₂, and humidity
・Sensor head heated to prevent condensation

CO₂ Probe GMP252
for ppm-level measurements in agriculture, refrigeration, demanding HVAC, and for plant growth manufacturers


・Measurement range 0 ~ 10 000 ppm CO2
・Can be used for measurements even up to 30 000 ppm CO₂ with reduced accuracy
・Intelligent, stand-alone probe with analog (V, mA) and digital outputs (RS485 with Vaisala protocol or Modbus)
・Superior long-term stability with the 2nd-gen proprietary CARBOCAP® technology
・Wide operating temperature range -40~+60 °C
・ IP65 classified housing
・Full temperature and pressure compensations
・Integrated temperature measurement for CO₂ compensation purposes
・Compensations for background gases: O₂, and humidity
Sensor head heated to prevent condensation


Weather Transmitter WXT530 Series
a compact all-in-one weather instrument

The WXT530 is a cost efficient series of all-in-one weather instruments. It provides six of the most important weather parameters: air pressure, temperature, humidity, rainfall, wind speed and wind direction. With 6 versions available, you can choose the measurement parameter combination that fits your application. WXT530 is a simple system that utilizes solid state technologies to minimize operating and maintenance costs. Integration is easy and flexible through the digital and analog interface. You can also connect third party sensors to WXT530 to create your own weather parameter hub. 



・Measurement parameters are integrated into one multiparameter platform
・Weather parameter hub having analog input options
・Set of 3rd party analog sensors can be connected (Temperature PT1000, solar radiation, water/snow level, tipping bucket)
・Digital interface incorporates also analog input parameters
・Analog output options
・Wide variety of digital communication modes
・Complies ISO60945 standard for maritime use
・DNV certificate approval
・Wide range of operating and heating voltages, No moving parts, Configuration Tool for PC, Works also with solar panels, USB connectivity, IP66 housing with the mounting kit, Machine-to-
 machine interface
・WXT530 fulfills IEC60945 maritime standard

Flexibility: The WXT530 is a series of weather instruments that provides six of the most important weather parameters, which are air pressure, temperature, humidity, rainfall, wind speed and
direction through various combinations. You can select the transmitter with the needed parameter(s) into your weather application, with a large variety of digital communication modes
and wide range of voltages.

Integration: The series offers analog input options for additional third party analog sensors. With the help of the built in analog to digital converters, you can turn the Weather Transmitter
WXT530 into a small, cost effective weather parameter hub. Additional parameters include the solar radiation, tipping bucket rain gauge, ultrasonic level sensor and external
temperature sensor. Further, the analog mA output for wind speed and direction enables wide variety of industrial applications.

Solid performance: The WXT530 Series has a unique Vaisala solid state sensor technology – it uses HUMICAP, BAROCAP, THERMOCAP, RAINCAP and WINDCAP technologies. To measure
wind the ultrasonic Vaisala WINDCAP Sensors are applied to determine horizontal wind speed and direction. Barometric pressure, temperature, and humidity
measurements are combined in the PTU module using capacitive measurement for each parameter. Liquid precipitation are measured with acoustic RAINCAP sensor.



Vaisala WINDCAP® Ultrasonic Wind Sensor WXT532
For stable and inexpensive wind measurements

WXT532 is part of the Weather Transmitter WXT530 Series. It is an ultrasonic wind sensor in a lightweight package. It incorporates decades of Vaisala experience in wind measurement using ultrasound to determine horizontal wind speed and direction. With no moving parts, the sensor has high sensitivity as the measurement time constant and starting threshold are virtually zero. This makes it superior to conventional mechanical wind sensors. It is ideal for use in marine applications as the housing with the mounting kit is water resistant. The sensor is also suitable for meteorological and environmental monitoring, for example, for measuring wind speed and direction in automatic weather stations.



・Triangular design ensures excellent data availability
・Maintenance-free with no moving parts
・Optional heating available
・Compact, durable, and robust
・Low power consumption
・IP66 housing with mounting kit
・mA output suitable for industrial applications
・Optional accredited wind calibration (MEASNET) available
・DNV GL Type Examination
・Easy to Install:WXT532 is compact and lightweight. The sensor can be mounted either on top of a pole mast or on a cross arm. The sensor is delivered fully assembled and configured from
the factory. With Vaisala Configuration Software Tool you can change the settings, such as averaging times, output mode, update intervals, measured variables, and message

・Low Power Consumption:WXT532 has very low power consumption. The average power consumption is typically about 3 mA at 12 VDC. It is ideal for solar panel and battery power

・Reliable: With solid state technology, WXT532 is designed to operate without periodic field calibration and maintenance. The optional heating available in WXT532 assists measurements in         freezing or snowy weather conditions and in humid environments. Since the heating circuit is independent of the operational power, separate power supplies can be used. Heating         is switched on automatically at low temperatures, well before the freezing point. The sensor fulfills IEC60945 maritime standard and is DNV type approved wind sensor.