Datasheet Contact Us Buy Now Relative Humidity and Temperature Probe HMP8 for pressurized processes Vaisala HUMICAP? Humidity and Temperature Probe HMP8 is designed for pressurized applications in compressed air systems, refrigerant dryers, and other pressurized industrial applications where easy insertion and removal of the probe and adjustable installation depth into the pipeline are needed. The HMP8 is part of the Indigo product family and compatible with Indigo500 and Indigo200 series transmitters and free Insight PC Software. 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) Sensor 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 Traceable calibration certificate: 5 points for humidity, 1 point for temperature + Show more Key Benefits Proven Vaisala HUMICAP performance Vaisala is the original innovator of the thin-film capacitive humidity measurement technology, which has now become the industry standard in humidity measurement. Chemical purge minimizes effects of contaminants In environments with high concentrations of chemicals and cleaning agents, the chemical purge option helps to maintain measurement accuracy between calibration intervals. Flexible connectivity The probe is plug and play compatible with Vaisala Indigo series transmitters, can be used as a standalone digital Modbus RTU transmitter, or connected to Vaisala Insight? PC Software. Watch the video Vaisala Indigo Family humidity and temperature probes Downloads Datasheet (503.48 KB) HMP8 Relative Humidity and Temperature Probe Download the Datasheet Datasheet: Indigo200 Series Transmitters For Vaisala Smart Probes (724.12 KB) Datasheet: HMP8 Relative Humidity and Temperature Probe (503.48 KB) Datasheet: Insight PC Software For Easy Access to Indigo Compatible Probes (592.8 KB) Datasheet: Indigo520 Transmitter (569.98 KB) Manual: HMP Series Multilingual Quick Guide (EN, JA) (1.26 MB) Manual: HMP Series User Guide (1.78 MB) Order Form: HMP8 order form global (329.19 KB) Brochure: Vaisala Indigo Family (3.36 MB) All downloads Product Resources Humidity calculator Read more Indigo500 series dual-probe support Read more What is a smart measurement probe and what makes it special? Read more Services Standard calibration Accredited calibration Calibration Care Agreement Repair service Need support? Need to calibrate? Sign up for news Contact us