Vaisala HMP1 Humidity and Temperature Probe


Vaisala HUMICAP® Humidity and Temperature Probe HMP1 is designed for measuring ambient measurement in indoor spaces. HMP1 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.



  • Probe for wall mounting when combined with Indigo series transmitters
  • RH accuracy up to ±1 %RH and temperature accuracy up to 0.2 °C (0.36 °F)
  • Temperature measurement range -40 … +60 °C (-40 … +140 °F)
  • 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