Vaisala HMS80 Series Humidity & Temperature Transmitter


  • Reliable outdoor transmitters with integrated radiation shields
  • ±3 %RH accuracy
  • User-exchangeable INTERCAP sensor for easy field replacement
  • Default output parameters are relative humidity and temperature. Dew point temperature, wet bulb temperature, and enthalpy outputs selectable using DIP switches
  • Options for both current and voltage outputs
  • Ingress protection IP65

Dpstar is a leader in environmental and industrial measurements. Curiosity and innovation are core values in our company. Our extensive knowledge and expertise are materialized in our selection of innovative products. Accurate measurements are essential for healthy indoor air and improving the energy efficiency of buildings. The unique, cutting-edge Dpstar sensor technologies are manifested throughout our versatile range of products. The transmitters have an exceptionally long lifetime and excellent measurement stability, thus being practically maintenance-free. These are among the many reasons why Dpstar’s products are a sustainable choice.

Vaisala HMS80 Series INTERCAP Humidity and Temperature Transmitters are designed for outdoor use in different building automation tasks. These transmitters, with an accuracy of ±3%, come with a built-in radiation shield to minimize the impact of solar radiation on temperature and humidity measurements.


Easy Installation

Vaisala HMS80 transmitters are easy to install. They can be mounted directly onto a wall or pole without any extra accessories. There are no loose parts, screws are retained in the enclosure, all connectors are clearly labeled, and the connectors are within easy reach. For fast and convenient configuration, the most popular control parameters in free cooling control – dew point temperature, wet bulb temperature, and enthalpy – are selectable using DIP switches.

Low Maintenance

Vaisala HMS80 series transmitters require minimal maintenance thanks to their excellent sensor stability and high-quality materials. If necessary, the INTERCAP sensor can easily be replaced in the field with minimum downtime.


A reliable basic outdoor humidity sensor for a pole or wall installation. Dew point, wet bulb, and enthalpy outputs can be selected by dip switch instead of the default RH output. 5-year warranty is valid for instruments purchased in 2021 and beyond. Vaisala HMS80 Series Humidity & Temperature Transmitter are optimized for outdoor measurements HVAC. They feature an integrated solar radiation shield, which is a must for accurate humidity and temperature measurements in outdoor conditions. Both 2-wire Vaisala HMS82 and 3-wire Vaisala HMS83 versions are available.


Model Type Output IP Rating
HMS82 Outdoor, RH+T 2-wire, current output IP65
HMS83 Outdoor, RH+T 3-wire, voltage output IP65
Relative Humidity
Measurement range 0 … 100 %RH
Accuracy at temperature range +10 … +30 °C (+50 … +86 °F) 0 … 90 %RH
90 … 100 %RH
±3 %RH
±5 %RH
Accuracy at temperature range -20 … +10 °C, +30 … +60 °C (-4 … +50 °F, +86 … +140 °F) 0 … 90 %RH
90 … 100 %RH
±5 %RH
±7 %RH
Accuracy in temperature range -40 … -20 °C (-40 … -4 °F) 0 … 100 %RH ±7 %RH
Stability in typical HVAC applications ±2 %RH over 2 years
Measurement range -40 … +60 °C (-40 … +140 °F)
Accuracy at +20 °C (+68 °F) ±0.3 °C (±0.54 °F)
Temperature dependence ±0.01 °C/°C
Temperature sensor Pt1000 RTD Class F0.1 IEC 60751
Calculated Parameters (1)
Measurement range for dew point temperature and wet bulb temperature -40 … +60 °C (-40 … +140 °F)
Measurement range for enthalpy -40 … 460 kJ/kg (-10 … +190 BTU/lb)
Accuracy at 20 °C (68 °F) and 80 %RH Dew point: ±0.9 °C (1.6 °F)
Wet bulb temperature: ±0.7 °C (1.3 °F)
Enthalpy: ±2 kJ/kg (0.9 BTU/lb)
(1) Accuracy of the calculated parameters should be calculated at the actual condition based on the relative humidity and temperature specification.
Inputs and Outputs
Current Output Model HMS82 (2-wire)
Outputs 4 … 20 mA, loop powered
Loop resistance 0 … 600 Ω
Supply voltage 20 … 28 VDC at 600 Ω load
10 … 28 VDC at 0 Ω load
Voltage Output Model HMS83 (3-wire)
Outputs 0 … 10 V
Loop resistance 10 kΩ min
Supply voltage 18 … 35 VDC
24 VAC ±20 % 50/60 Hz
Operating Environment
Operating temperature -40 … +60 °C (-40 … +140 °F)
Operating humidity 0 … 100 %RH
Maximum wind/flow speed 30 m/s (67 mph)
Storage temperature -40 … +60 °C (-40 … +140 °F)
EMC compliance EN61326-1, Industrial Environment
Max. wire size 1.5 mm2 (AWG 16)
Standard housing color White (RAL9003)
Housing material PC + 10 %GF (UL-V0 approved)
Spare Parts and Accessories
INTERCAP sensor 15778HM
10 pcs of INTERCAP sensors INTERCAPSET-10PCS
Conduit fitting + O-ring (M16 × 1.5 / NPT1/2 Inch) 210675SP
Conduit fitting + O-ring
(M16 × 1.5 / PG9, RE-MS)
Fastening set HMS80 237805
Membrane Filter ASM210856SP
Terminal Block, Blue 236620SP




Vaisala HMS80 Series Humidity & Temperature Transmitter_DpstarGroup