Www.hvac.vn Series RHP Temperature and Humidity Transmitter The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential.
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Series RHPTemperature and Humidity Transmitter
The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employees as a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness, product names, and logos, included within these compilations may not be used without specific,
Accuracy, Thermistor Temp Sensor: ±0.2°C @ 25°C (±0.36°F @ 77°F)Accuracy, RTD Temp Sensor: DIN Class B; ±0.3°C @ 0°C (±0.54°F @ 32°F)Output signal: 4 to 20 mA/ 0 to 10V @ 5 mA max
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General Specifications
RH Sensor: Capacitance polymerTemperature Sensor:
Types 1, 2, 3: Solid state band gapCurves A, B, C: ThermistorCurves D, E: Platinum RTD DIN 385
Enclosure: Duct mount: PBT; OSA: Polycarbonate.Enclosure Rating: NEMA 4X (IP66) for OSA mount onlyAgency Approvals: CE
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Relative Humidity
Relative humidity (RH) is the amount of water vapor in a volume of air as a proportion of the amount of water vapor the same volume of air will hold at saturation (100% RH) at any given temperature
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Capacitance Polymer Humidity Sensors
Works similar to a plate capacitorConsists of hygroscopic polymer between two electrodesOne of the electrodes is a sensing surface
Porous to allow water to pass in and out of polymerKeeps out condensation and contaminants
As polymer absorbs water, its dielectric constant changes, creating changes in capacitance proportional to changes in relative humidity
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Features
SensorRH range: 0-100%15 second response timeSensor recovers 100% from saturationFactory calibrated, field replaceable sensors available
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Features
Wall mountOptional remote or integral LCD displayUniversal current/voltage output for humidity/temp.Resistive temp. Outputs availableReplaceable sensorsWell ventilated for more accurate measurements