Vaisala HMS110 Humidity & Temperature Transmitter


  • Reliable outdoor transmitters with integrated radiation shields
  • ±2 %RH accuracy
  • Proven HUMICAPâ 180R sensor for long-lasting accuracy
  • 3-point traceable calibration (certificate included)
  • Default output parameters are relative humidity and temperature. Dew point temperature, wet bulb temperature, and enthalpy outputs are selectable with a PC connection.
  • Current output (4 … 20 mA)
  • On-site calibration with HM70 Hand-Held Meter or PC connection
  • 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.

The Vaisala HMS110 Series HUMICAP Humidity and Temperature Transmitters are designed for tough outdoor measurements in building automation. These transmitters, with an accuracy of ±2%, come with a built-in radiation shield to minimize the impact of solar radiation on temperature and humidity readings.


Proven Performance For Outdoor Measurements

Vaisala HMS110 transmitters come with the reliable HUMICAP 180R humidity sensor, known for its durability in high humidity. The sensor’s superior stability ensures long-lasting accuracy and minimal maintenance throughout the transmitter’s lifetime. Plus, the built-in radiation shield ensures precise measurements by minimizing the effects of sunlight on temperature and humidity, making it perfect for outdoor use.

Easy Installation & Maintenance

Vaisala HMS110 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. The HUMICAP sensor’s excellent long-term stability and high-quality materials ensure minimal need for maintenance. If adjustments are needed, the transmitter can be field calibrated using Vaisala HM70 Hand-Held Humidity and Temperature Meter or a PC connection.


Vaisala HMS110 Humidity & Temperature Transmitter is ideal for controlling cooling towers and economizers. It directly gives wet-bulb temperature, enthalpy, and dew-point, along with RH and temperature. These transmitters are accurate within ±2% and come with a built-in radiation shield to maintain accuracy outdoors. They come with a 5-year warranty for units purchased in 2021 or beyond. Equipped with the reliable HUMICAP 180R humidity sensor, known for stability even in high humidity, these transmitters require minimal maintenance. If needed, the transmitters can be field-calibrated using either the Vaisala HM70 Handheld Humidity and Temperature Meter or a PC connection.


Relative Humidity
Measurement range 0 … 100 %RH
Stability in typical HVAC applications ±0.5 %RH/year
Humidity sensor Vaisala HUMICAP 180R
Accuracy at temperature range +10 … +30 °C (+50 … +86 °F) 0 … 90 %RH ±2 %RH
90 … 100 %RH ±3 %RH
Accuracy at temperature range -20 … +10 °C, +30 … +60 °C (-4 … +50 °F, +86 … +140 °F) 0 … 90 %RH ±3 %RH
90 … 100 %RH ±4 %RH
Accuracy at temperature range -40 … -20 °C (-40 … -4 °F) 0 … 100%RH ±4 %RH
Measurement range -40 … +60 °C (-40 … +140 °F)
Accuracy at +20 °C (+68 °F) ±0.2 °C (±0.36 °F)
Temperature dependence ±0.01 °C/°C
Temperature sensor Pt1000 RTD Class F0.1 IEC 60751
Calculated Parameters
Factory calibration uncertainty at 20 °C (+68 °F) ±1.5 %RH/±0.2 °C
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 of the calculated parameters should be calculated at the actual condition based on the RH and temperature specification.
Accuracy at 20 °C (68 °F) and 80 %RH
Dew point ±0.7 °C (1.2 °F)
Wet bulb temperature ±0.5 °C (0.9 °F)
Enthalpy ±1.6 kJ/kg (0.7 BTU/lb)
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
Inputs and Outputs
Analog outputs 4 … 20 mA, loop powered
Loop resistance 0 … 600 Ω
Supply voltage 20 … 28VDC at 600 Ω load
10 … 28VDC at 0 Ω load
Data input for RDP100 Remote Panel Display RS-485
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
Remote Panel Display RDP100
Conduit fitting + O-ring (M16 × 1.5 / NPT1/2 Inch) 210675SP
Conduit fitting + O-ring (M16 × 1.5 / PG9, RE-MS) 210674SP
Fastening set HMS110 237805
Membrane Filter ASM210856SP
Terminal Block, Blue 236620SP
USB cable for PC connection 219690
Connection cable for HM70 hand-held meter 219980SP


Vaisala HMS110 Humidity & Temperature Transmitter_DpstarGroup