




Dwyer Instruments RHPX-2SDA0-00 | Relative Humidity/Temperature transmitter | 2% small enclosure | Duct | Analog output
The humidity and temperature are precisely monitored by the Series RHPX, Model RHPX-2SDA0-00 Humidity and Temperature Transmitter for building management functions to enhance occupant comfort and decrease operating expenses. Models using capacitance polymer humidity sensors come in 2% and 3% accuracy options. There is a two-line alphanumeric LCD display available as an alternative. The Series RHPX is a great option for temperature and humidity monitoring in commercial HVAC systems, clean rooms, data centers, museums, and building energy management systems due to its high precision, long-term stability, and dependable performance in a variety of enclosure types. In addition to enthalpy, the Series RHPX can be set to offer absolute or relative humidity as well as the dew point.

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Accuracy | Humidity Sensor: Model specific, +/-2 % or +/-3 %, at 10 % - 90 % RH and 25 °C (77 °F) |
Accuracy | Temperature Sensor Accuracy, RTD: DIN Class B; +/-0.3°C @ 0°C (+/-0.54°F @ 32°F) (analog models only) |
Accuracy | Temperature Sensor Accuracy, Solid State Band Gap: +/-0.9°F @ 77°F (+/-0.5°C @ 25°C) |
Accuracy | Temperature Sensor Accuracy, Thermistor: +/-0.2°C @ 25°C (+/-0.36°F @ 77°F) (analog models only) |
Approvals | BTL, CE, UL 2043*, UL-60335-2-40** |
communication | Network: BACnet MS/TP protocol or Modbus® RTU (communicating models only) |
Connection | Wiring: Removable terminal block |
Display | Optional: Two (2) lines of alphanumeric characters with eight (8) characters per line |
ENCLOSURE MATERIAL | UL 94 V-0 |
Enclosure Rating | IP66 |
Humidity | 4-20 mA or 0-5 V dc, 0-10 V dc at 5 mA max, field selectable |
Humidity | Sensor: Capacitive polymer |
Measurement range | Humidity: 0 % to 100 % humidity |
Measurement range | Temperature: -40 °C to 60 °C (-40 °F to 140 °F) |
Operating Temperature | Range: -40°C to 60°C (-40°F to 140°F); With LCD: -20°C to 60°C (-4°F to 140°F) |
Power | Communications model: 14 to 35 Vdc or 10 to 32 Vac; Analog model: 4-20 mA: 10 to 35 Vdc; Vout: 15 to 35 Vdc or 15 to 29 Vac |
Resolution | Relative humidity: 0.1%; temperature: 0.1°F/°C; absolute humidity: 0.1 g/m3 |
Sensor Type | Types II and III: Solid state band gap Curves A, B, and F: Thermistor Curves D and E: Platinum RTD DIN 385, Balco 1K (analog models only, availability is sensor configuration dependent) |
Storage Temperature | -40°C to 70°C (-40°F to 158°F); With LCD: -30°C to 70°C (-22°F to 158°F) |
Temperature | 4-20 mA or 0-5 V dc, 0-10 V dc at 5 mA max, field selectable |
Termination | Load: 120 © (communicating models only) |
Type | Relative Humidity/Temperature transmitter |
Weight | Duct: 198.4 g (0.44 lb); wall mount: 170 g (0.38 lb); large housing: 340.2 g (0.75 lb); large housing with radiation shield: 1247.4 g (2.75 lb) |
- Less expensive installation thanks to several on-board sensors.
- Outdoor fences with UV protection require little upkeep.
- Installation in the plenum space is permitted due to UL 2043 compliance.
- With the detachable terminal block, fixed lid, and cable management, installation is simple.
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