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Essential for HVAC applications where water is present, Vaisala has introduced their HMW112 Wall Mounted Analog Humidity and Temperature Transmitter. The HMW112 has an IP65 certified enclosure, safeguarding the sensor and electronics from possible water splashes.
The HMW112’s HUMICAP 180R sensor has excellent long-term stability, thus reducing maintenance needs during the lifetime of the transmitter. More still, users can field-calibrate the transmitter with an HM70 Hand-Held Humidity and Temperature Meter or PC connection for utmost efficiency. With an RH accuracy of +/-2%RH, Vaisala’s HMW112 Humidity and Temperature Transmitter is outfitted for an array of requirements in HVAC applications.
Note - Analog outputs are preset at the factory to:
Channel 1: 4 ... 20 mA = 0 ... 100% RH
Channel 2: 4 ... 20 mA = -40 ... +60 °C (-40 ... +140 °F) T
| Performance | |
| RELATIVE HUMIDITY | |
| Measurement range | 0 ... 100 %RH |
| Accuracy | |
| Temperature range | +10 ... +30 °C (+50 ... +86 °F) |
| 0 ... 90 %RH | ±2 %RH |
| 90 ... 100 %RH | ±3 %RH |
| Temperature range | -20 ... +10 °C, +30 ... +60 °C (-4 ... +50 °F, +86 ... +140 °F) |
| 0 … 90 %RH | ±3 %RH |
| 90 … 100 %RH | ±4 %RH |
| Temperature range | -40 ... -20 °C (-40 ... -4 °F) |
| 0 ... 100%RH | ±4 %RH |
| Stability in typical HVAC applications | ±0.5 %RH/year |
| Humidity sensor | Vaisala HUMICAP® 180R |
| 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 | |
| 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 | ±1.6kJ/kg (0.7 BTU/lb) |
| Factory calibration uncertainty at 20 °C (+68 °F) | ±1.5%RH/±0.2 °C |
| Operating Environment (All Models) | |
| Operating temperature range | -40 ... +60 °C (-40 ... +140 °F) |
| Operating humidity range | 0 ... 100 %RH |
| Maximum wind/flow speed | 30 m/s |
| Storage temperature | -40 ... +60 °C (-40 ... +140 °F) |
| Electromagnetic compliance | EN61326-1, Industrial Environment |
| Mechanics | |
| Max wire size | 1.5 mm2 (AWG 16) |
| Standard housing color | White (RAL9003) |
| Housing material | PC + 10%GF (UL-V0 approved) |
| Inputs and Outputs | |
| Analog output | 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 | RS485 |
| Panel Display | Vaisala proprietary protocol |
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