HMP7 Relative Humidity and

Temperature Probe

For high humidities

Features

• 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

• Condensation prevention with

probe heating

• Sensor purge improves long-term

stability and chemical resistance

• Modbusâ RTU over RS-485

• Compatible with Vaisala Indigo

products and Insight PC software

• Traceable calibration certificate:

6 points for humidity, 1 point for

temperature

Vaisala HUMICAPâ Humidity and Temperature Probe HMP7 is designed for

applications that 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.

Proven Vaisala HUMICAPâ

performance

Vaisala is the original innovator of the

thin-film capacitive humidity

measurement technology, which has now

become the industry standard in

humidity measurement.

HUMICAPâ 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.

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.

Flexible connectivity

The probe can be used as a standalone

digital Modbus RTU transmitter over an

RS-485 serial bus, and it can also be

connected to Indigo transmitters and the

Indigo80 handheld indicator. For easy-

to-use access to field calibration, device

analytics, and configuration functionality,

the probe can be connected to Vaisala

Insight software for Windowsâ. For more

information, see www.vaisala.com/

insight.

Vaisala Indigo product family

Indigo transmitters extend the

capabilities of Indigo-compatible

measurement probes. The transmitters

can display measurements on the spot as

well as transmit them to automation

systems through analog signals, digital

outputs, and relays. Cable length

between probe and transmitter can be

extended to up to 30 meters.

The Indigo80 handheld indicator is ideal

for spot-checking and process

monitoring, as well as for configuring,

troubleshooting, calibrating, and

adjusting the probe. For more

information, see www.vaisala.com/

indigo.