Vaisala Transmitters
This page features a small selection of the currently available transmitters.
If your desired product is not listed here, please do not hesitate to contact us, so we can assist you according to your requirements.
Humidity and Temperature Transmitter Vaisala HUMICAP® Series HMT330
Top-of-the-Line models for demanding industrial applications
Choose among six models for almost every application:
- Fixed sensor
- Duct mounting and tight spaces (pipes, channels, etc.)
- High pressures up to 100 bar and vacuum conditions
- High temperatures up to 180°C
- High humidity applications
- Pressurized pipelines up to 40 bar
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- Full 0 ... 100 % RH measurement
- Temperature range up to +180 °C (depending on model)
- Pressure up to 100 bar (depending on model)
- Next generation Vaisala HUMICAP® Sensor for excellent accuracy and stability
- Graphical display of measurement trends and over four-year history
- Multilingual user interface
- Excellent performance in harsh chemical concentrations
- Corrosion resistant IP65 housing
- NIST traceable (certificate included)
- Optional integrated data logging, with over four years of measured history
- LAN and WLAN communication options
Intrinsically Safe Humidity and Temperature Transmitter Series HMT370EX
For use up to zone 0 and 20
The intrinsically safe 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.
View the current certificates for the HMT370EX:
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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.
HMT370X Features:
- Intrinsically safe (Exi)
- Interchangeable probes
- Detachable probe module
- Graphical LCD display and non-display model
- Vaisala HUMICAP® sensor
- Compatible with Vaisala Insight PC software
- Traceable calibration (certificate included)
The HMT370EX offers several probe options for different applications:- HMP371 - for wall mounting
- HMP373 - for confined spaces
- HMP374 - for pressurized spaces
- HMP375 - for high temperature
- HMP377 - for high humidity
- HMP378 - for pressurized pipelines
Models for measuring moisture in oil and jet fuel:
- HMP378H - for type JET A-1 fuel
- HMP378F - for moisture in oil
Transmitters for Barometric and Differential Pressure
Pressure Transmitter PTB110
The pressure transmitter PTB110 has been designed to measure exact air pressure at ambient temperature, as well as for the general monitoring of the ambient pressure in a broad temperature range.
Differential Pressure Transmitter PDT101
The differential pressure transmitter PDT101 has been specifically designed to meet the demands of challenging applications in life sciences, as well as for high-tech clean room applications.
The PDT101 can be attached to the wall, a DIN rail or a panel and is ideally suited to be integrated into the continuous monitoring system viewLinc, as is required in controlled environments for measuring and monitoring of critical environmental parameters.
- Includes NIST traceable calibration
- 4 different models available
Differential Pressure Transmitter PDT102
The differential pressure transmitter PDT102 stands out in particular through its ultra-slim design and clips directly to a DIN rail. Like the PDT101 it is designed for demanding applications in life sciences as well as for high-tech clean room applications.
- Includes NIST traceable calibration
- 16 different models available
Dewpoint and Temperature Transmitter for Wall Mounting Vaisala DRYCAP® Series DMT340
The first choice for demanding industrial applications with low dew points
Features:
- Measures dew points from -60 °C to +80 °C with the accuracy of ±2 °C
- Vaisala DRYCAP® Sensor provides accurate, reliable measurement with excellent long-term stability and fast response
- Immune to condensation
- Unique auto-calibration feature
- Optional alarm relays, local display and mains power supply module
- Compatible with the hand-held dew point meter DM70 (see below)
- NIST traceable (certificate included)
- 3 analog outputs and a serial interface, WLAN/LAN
Transmitters for Vaisala Smart Probes
Indigo 200 Series Transmitters
for Vaisala's Smart Humidity, Temperature, Dew Point, Moisture in Oil, CO2 and H2O2 Probes
Vaisala Indigo200 Series host devices are part of the Vaisala Indigo product family and intended for Vaisala's intelligent, stand-alone probes, including humidity probes (HMP1, HMP3, HMP4, HMP5, HMP7, HMP8 and HMP9), dew point probes (DMP5, DMP6, DMP7 and DMP8), temperature probe TMP1, CO2 probes (GMP251 and GMP252), moisture-in-oil probe MMP8, as well as our vaporized hydrogen peroxide probe series HPP270, as well as HPP271 to measure hydrogen peroxide vapor (ppm), or the HPP272 to measure hydrogen peroxide vapor (ppm), temperature, and humidity (relative humidity and relative saturation). The HPP272 probe also includes other calculated parameters such as dew point and vapor pressure measurements.
Are you looking for a transmitter with a metal enclosure? Discover the Indigo500 series with support for two probes and many more additional feature.
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Typical applications for the Indigo200 include industrial and compressed air drying, life science incubators, hatchers and setters, greenhouses, cold storage & refrigeration, food transportation, CO2 safety, hydraulic and lubrication oil monitoring as well as demanding HVAC such as animal shelters, swimming pools, parking garages, and facilities using vaporized hydrogen peroxide decontamination.
Indigo200 allows for easy evaluation and visualization of data, including wirelessly. The installation is uncomplicated and time-saving. In addition, the probe types are interchangeable, reducing downtime. The IP65 enclosure allows safe use in harsh environments and is resistant to dust and most chemicals. The smooth surface of the enclosure makes cleaning easy.Indigo200 Features
- Plug-and-play connection for Vaisala Indigo compatible probes
- Wireless (WLAN) interface for configuration and temporary use
- Operating temperature range: −40 ... +60 °C (−20 ... +60 °C for units with display)
- Color LCD (optional version without display for analog model)
- Housing protection class IP65
- 24- V supply voltage
- Indigo201 model: three analog outputs (mA or V)
- Indigo202 Model: RS485 with Modbus RTU
- Two configurable relays


Indigo500 Series Transmitters
for Vaisala Smart Probes
The Vaisala Indigo500 series transmitters are host devices for Vaisala Indigo-compatible, stand-alone smart probes. The transmitters offer numerous additional features to the Indigo probes.The Indigo520 transmitter can accommodate up to two probes measuring the same or two different parameters simultaneously. The Indigo510 supports one probe only. When it’s time for calibration, simply remove the probe, replace it with a new one, and send the removed probe for calibration without interrupting your process and reducing downtime.
The Indigo520 can be used together with HMP1, HMP3, HMP9, HMP7 or TMP1 probes for measuring barometric pressure, humidity, and temperature.
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To help you choose the right Indigo series transmitter, view this comparison sheet.
Both transmitters are available with touchscreen displays made of chemically strengthened (IK08) glass for local data visualization. The transmitters also extend the options for connectivity, supply voltage and wiring, compared to using just a single Indigo-compatible probe. Rugged IP66- and NEMA4-rated metal enclosures ensure 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 the vaporized hydrogen peroxide probes HPP271 and HPP272. The Indigo500 series is also compatible with the MHT410 Moisture, Hydrogen and Temperature Transmitter for power transformer online monitoring.
Indigo500 Features
- Universal transmitter for Vaisala Indigo-compatible probes
- Touchscreen display (also available as non-display version)
- IP66- and NEMA4-rated metal enclosure
- Ethernet connection with web interface for remote access
- Modbus TCP/IP protocol
- Multiple power supply options including Power over Ethernet (PoE) and AC mains power
- Indigo520 supports two probes simultaneously
- Indigo520 features 2 relays and 4 configurable analog outputs
- Indigo510 features 2 analog outputs
Datasheet Indigo 510 Datasheet Indigo 520
Humidity and temperature probes
The Indigo-compatible humidity sensors are based on Vaisala's proprietary HUMICAP® technology, which is well-known for its excellent long-term stability, sensor heating for condensing environments and complete recovery after condensation, its insensitivity to dust and most chemicals, and the option to clean using chemicals. Choose from the following probes according to your needs.
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Humidity and temperature probe HMP1 for wall mounting
Vaisala HUMICAP® Humidity and Temperature Probe HMP1 is designed for ambient measurements in indoor spaces. The HMP1 probe 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.
Features:
- Probe for wall mounting when combined with Indigo series transmitters
- RH accuracy up to ±1 %RH and temperature accuracy up to 0.2 °C
- Temperature measuring range -40 ºC ... +60 ºC
- Chemical purge provides superior chemical resistance
- Modbus RTU over RS-485 for flexible connectivity
- Includes a traceable calibration certificate: 6 points for humidity, 1 point for temperature
Datasheet HMP1
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Humidity and temperature probe HMP3 with replaceable sensor
Features:
- RH accuracy up to 0.8 %, temperature accuracy up to 0.1 °C
- Temperature measuring range -40 ºC ... +120 ºC
- Compatible with Indigo series transmitters
- PPS plastic grid filter with stainless steel mesh delivered as standard
- Modbus RTU over RS-485 for flexible connectivity
- Includes traceable calibration certificate
Datasheet HMP3
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Relative Humidity and Temperature Probe HMP4 for High Pressure Applications
Features:
- RH accuracy up to 0.8 %, temperature accuracy up to 0.1 °C
- Temperature measuring range -70 ºC ... +180 ºC
- Operating pressure range 0 ... 10 MPa (0 ... 100 bar)
- Chemical purge provides superior chemical resistance
- Modbus RTU over RS-485
- Plug & play compatible with Indigo™ series of transmitters
- Includes a traceable calibration certificate: 5 points for humidity, 1 point for temperature
Datasheet HMP4
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Relative Humidity and Temperature Probe HMP5 for High Temperatures
Features:
- RH accuracy up to 0.8 %, temperature accuracy up to 0.1 °C Temperature measuring range -70 ºC ... +180 ºC
- 250 mm long probe allows easy process installation through insulation
- Chemical purge provides superior chemical resistance
- Modbus RTU over RS-485
- Plug & play compatible with Indigo™ series of transmitters
- Includes a traceable calibration certificate: 5 points for humidity, 1 point for temperature
- Sintered AISI316L filter included as standard in delivery
Datasheet HMP5
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Relative Humidity and Temperature Probe HMP7 for High Humidities
Features:
- RH accuracy up to 0.8 %, temperature accuracy up to 0.1 °C
- Temperature measuring range -70 ºC ... +180 ºC
- Vapor and pressure proof construction
- Probe and sensor heating functions minimize condensation on probe
- Chemical purge provides superior chemical resistance
- Plug & play compatible with Indigo™ series of transmitters
- Modbus RTU over RS-485
- Includes a traceable calibration certificate: 6 points for humidity, 1 point for temperature
Datasheet HMP7
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Relative Humidity and Temperature Probe HMP8 for Pressurized Processes
Features:
- RH accuracy up to 0.8 %, temperature accuracy up to 0.1 °C
- Temperature measuring range -70 ºC ... +180 ºC
- Chemical purge provides superior chemical resistance
- Probe installation depth can be freely adjusted and probe can be hot-swapped from pressurized pipelines with an installation valve
- Modbus RTU over RS-485
- Plug & play compatible with Indigo™ series of transmitters
- Includes a traceable calibration certificate: 5 points for humidity, 1 point for temperature
Datasheet HMP8
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Compact humidity and temperature probe HMP9 - for rapidly changing environments
Features:
- Miniature probe head with low thermal mass for superior response time
- RH accuracy up to 0.8 %RH
- Temperature accuracy up to 0.1 °C
- Temperature measuring range -40 ºC ... +120 ºC
- Chemical purge provides superior chemical resistance
- Modbus RTU over RS-485
- Compatible with Indigo
- transmitters and Insight PC software
- Traceable calibration certificate: 6 points for humidity, 1 point for temperature
- M10×1.5 cable gland included for mounting the probe head
Datasheet HMP9
Carbon Dioxide Probe (CO2)
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Carbon Dioxide Probe for %-Level Measurements
Carbon Dioxide Transmitter (CO2) – intelligent, stand-alone probe for measuring carbon dioxide. Typical Applikations are Horticulture and Storage and Transport, Greenhouses and mushroom farming, leakage monitoring, Demand controlled ventilation in harsh environments as well as life science incubators and cold storages.
- 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
Data sheet
Hydrogen peroxide probes
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Vaporized Hydrogen Peroxide, Humidity and Temperature Measurement in Bio-Decontamination Processes
The Vaisala PEROXCAP® HPP272 is a new, intelligent 3-in-1 measurement probe with both digital and analog outputs. It has been developed for manufacturers, service providers and end-users who use vaporized H2O2 for bio-decontamination processes. In addition to H2O2, the compact HPP272 measures temperature and humidity, referring to both relative humidity and relative saturation. This 3-in-1 probe is ideal for applications such as isolators, transfer hatches, and room bio-decontamination. The probe can measure reliably and accurately even in high humidity.
- Superior long-term stability and repeatability
- Traceable calibration certificate
- Corrosion-resistant stainless steel housing (IP65)
- Compatible with Indigo Output Transmitters when preferred
Data sheet
Information Peroxcap-Technology
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Test Cabinets for
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