HMP7 Relative Humidity and Temperature Probe

Vaisala is the original innovator of the thin-film capacitive humidity measurement technology, which has now become the industry standard in humidity measurement. HUMICAP technology results from Vaisala's 40-year experience in industrial humidity measurement, providing the best stability, fast response time, and low hysteresis in a wide range of applications.

♦   RH accuracy up to 0.8 %RH
♦    Temperature accuracy up to 0.1 °C (0.18 °F)
♦    Temperature measurement range -70 ... +180 °C (-94 ... +356 °F)
♦    Vapor and pressure proof construction
♦   Probe and sensor warming functions minimize condensation on probe
♦    Sensor purge provides superior chemical resistance
♦    Modbus RTU over RS-485
♦    Plug & play compatible with Indigo™ series of transmitters
♦    Traceable calibration certificate: 5 points for humidity, 1 point for temperature

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HMP7 Relative Humidity and Temperature Probe

Avoiding Condensation at Extreme Humidity

Probe heating functionality heats up not only the sensor, but the whole probe head. When probe temperature is heated above dew point temperature, condensation on the probe can be avoided while measuring the dew point temperature of the process. By setting the temperature compensation value obtained, for example, with the TMP1 temperature probe, true relative humidity at process temperature can be measured while avoiding condensation by elevated probe temperature.

Vaisala Indigo Product Family

Indigo transmitters offer a variety of connectivity options through analog signals or digital outputs, configurable relays, and wireless (WLAN) configuration interface, providing a suitable solution for all industrial humidity measurements. The cable length between the probe and transmitter can be extended to up to 30 meters.

Flexible Connectivity

The probe is plug and play compatible with Vaisala Indigo series of transmitters, or it can be used as a standalone digital Modbus RTU transmitter over RS-485 serial bus. For easy-to-use access to field calibration, device analytics, and configuration functionality, the probe can be connected to Vaisala Insight Software.

Services You Can Count On

Each probe is manufactured and individually calibrated in Vaisala's world class facility in Finland. The traceable factory calibration certificate is included also in electronic format in the probe. Validate and maintain the accuracy by calibrating the instrument on the field, or use Vaisala's easy and thorough calibration services.