Vaisala TMP1 Temperature Probe


  • Temperature accuracy up to ±0.1 °C (±0.18 °F).
  • Temperature measurement range: −70 … +180 °C (−94 … +356 °F).
  • Modbusâ RTU over RS-485.
  • Compatible with Indigo series transmitters and Insight PC software.
  • Traceable 2-point calibration certificate with calibration points at +20 and +70 °C (+68 and +158 °F).

Dpstar is a leading supplier of environmental measurement sensors for temperature, relative humidity, pressure, dew point, CO2, and other environmental condition monitoring for industrial process application and research. Since the ’90s, we earned a reputation as a trusted partner to our clients through our commitment and dedication. We are an authorized distributor and supplier of measuring sensors solutions from renowned manufacturers Vaisala. Vaisala is a global leader in environmental and industrial measurement. Building on 80 years of experience, Vaisala provides observations for a better world. Vaisala is a reliable partner for customers around the world, offering a comprehensive range of innovative observation and measurement products and services.

Vaisala Temperature Probe TMP1 is designed for demanding temperature measurements in industrial applications such as the pharmaceutical industry and calibration laboratories, where accuracy and robustness are essential. The TMP1 is part of the Indigo family and compatible with Indigo500 and Indigo200 series transmitters.


Key Benefits

  • Flexible Connectivity
    The probe is plug-and-play compatible with the Vaisala Indigo™ series of transmitters, or it can be used as a standalone digital Modbus RTU transmitter over RS-485 serial bus.
  • Part of Vaisala Indigo™ Product Family
    Indigo transmitters offer a variety of connectivity options through analog signals or digital outputs, configurable relays, and wireless (WLAN) configuration interfaces.
  • Relative Humidity Measurements In High Humidities
    When the TMP1 probe is connected to a control system with HMP7, it is possible to have relative humidity measurement in actual process temperature while using probe heating in the relative humidity probe HMP7.


Measurement Performance
Measurement range −70 … +180 °C (−94 … +356 °F)
Accuracy at +23 °C (+73.4 °F) 1) ±0.1 °C (±0.18 °F)
Factory calibration uncertainty 2) ±0.1 °C (±0.18 °F) at +23 °C (+73.4 °F)
Sensor Pt100 RTD Class F0.1 IEC 60751
1) Defined against calibration reference. Including non-linearity, hysteresis, and repeatability.
2) Defined as ±2 standard deviation limits. Small variations possible; see calibration certificate
Operating Environment
Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)
Operating temperature of probe head −70 … +180 °C (−94 … +356 °F)
Operating environment Suitable for outdoor use
IP rating
Probe body IP66
Probe head and cable IPX8/IPX9
Inputs & Outputs
Operating voltage 15 … 30 V DC
Current consumption 10 mA typical
Digital output RS-485, non-isolated
Protocols Modbus RTU
Output parameters Temperature (°C) Water vapor saturation pressure (hPa)
EU directives EMC Directive (2014/30/EU)
RoHS Directive (2011/65/EU)
EMC compatibility EN 61326 1, industrial environment
Type approvals DNV GL certificate no. TAA00002YT
Compliance marks CE, China RoHS, RCM, WEEE
Mechanical Specifications
Connector M12 5-pin A-coded male
Weight 224 g (7.9 oz)
Probe AISI 316L
Probe body AISI 316L
Cable jacket FEP
Duct installation kit for T probe 215003
Swagelok for 6 mm probe, 1/8″ ISO thread SWG6ISO18
Swagelok for 6 mm probe, 1/8″ NPT thread SWG6NPT18
Indigo USB adapter 1) USB2
1) Vaisala Insight software for Windows available at


Vaisala TMP1 Temperature Probe_DpstarGroup