• Humidity and Temperature Transmitter

Humidity and Temperature Transmitter

  • ±2%RH outdoor sensors for HVAC​
  • Integrated solar radiation shield
  • Minimal maintenance

±2%RH outdoor sensors for HVAC​

Vaisala HUMICAP Humidity and Temperature Transmitter Series HMS110 are ideal for cooling tower control and differential enthalpy control of economizers. The HMS110 directly outputs wet-bulb temperature, enthalpy and dew-point in addition to RH and temperature. These ±2% transmitters include an integrated radiation shield to reduce the influence of solar radiation on temperature and humidity measurements and to ensure measurement accuracy in outdoor conditions.

Key Benefits

Minimal maintenance

The sensor’s superior stability ensures long-lasting accuracy and minimal maintenance throughout the transmitter’s lifetime.

HMS110 transmitters are easy to install

They can be mounted directly on to a wall or pole without any extra accessories.

Integrated radiation shield

The integrated radiation shield allows unrivaled measurement performance, reducing the impact of the sunshine on temperature and humidity measurements and ensuring measurement accuracy in outdoor conditions.


HMS110 transmitters are equipped with the trusted HUMICAP 180R – a robust, general-purpose humidity sensor that functions well in high humidity. The sensor’s superior stability ensures long-lasting accuracy and minimal maintenance throughout the transmitter’s lifetime. If necessary, the transmitters can be field-calibrated using either the Vaisala HM70 Handheld Humidity and Temperature Meter, or a PC connection.


Two product models are available: HMS110 and HMS112.


Features

  • Integrated solar radiation shield
  • Calibration certificate included
  • Proven HUMICAP® 180R sensor for long-lasting accuracy
  • 3-point traceable calibration (certificate included)
  • Current output (4...20 mA)
  • On-site calibration with HM70 Hand-Held Meter or PC connection
  • Ingress protection IP65
Model 
Type 
Output
IP Rating
HMS110
Outdoor, RH+T
2-wire, current output
IP65
HMS112
Outdoor, RH+T
2-wire, current output
IP65

HMS110 is delivered with customer specific output settings, including calculated humidity parameters and special scaling of outputs.

Relative Humidity

Measurement range
0 ... 100 %RH
Stability in typical HVAC applications
Stability in typical HVAC applications
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

Temperature

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 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
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 Vaisala proprietary protocol
Max. wire size 
1.5 mm2 (AWG 16)
Standard housing color
White (RAL9003)
Housing material
PC + 10 %GF (UL-V0 approved)
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
HUMICAP 180R sensor
HUMICAP180R