User 's Manual

The T/H probe HMP4 is designed for high pressure applications such as Marine, breathing air and compressed air systems in industrial applications that focus on measurement performance and chemical tolerance. HMP4 is an integral part of the Indigo product range and is compatible with the Indigo200 series of mainframe devices and the free Insight PC software.

Features:

• ? Relative humidity (RH) accuracy up to 0.8 %RH, temperature accuracy up to 0.1 °C (0.18 °F)
• ? Temperature measuring range -70... +180 °C (-94... + 356 ° F)
• ? Working pressure range 0... 10 MPa (0 ... 100 bar)
• ? Sensor clearance provides good chemical tolerance
• ? Support for Modbus RTU communication protocol based on RS-485
• ? Plug and play, compatible with Indigo? series of transmitters
• ? Traceable calibration certificate: 5 points for humidity, 1 point for temperature

Main Advantages:

Proven Vaisala HUMICAP® performance

Vaisala has thin-film capacitive humidity measurement technology, which is widely accepted and commonly used in the field of humidity measurement, and is also widely followed in the field of humidity measurement standards.

Chemical removal reduces the effects of contaminants

In environments with high concentrations of chemicals and cleaners, the chemical removal option helps maintain measurement accuracy between calibration intervals.

Flexible connection

The probe is plug and play, compatible with the Visala Indigo host device, and can be used as a standalone digital Modbus RTU transmitter, or connected to the Visala Insight? PC software.