Series RHPTemperature and Humidity Transmitter

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Introduction

Combined humidity and temperature sensingThe polymer capacitance humidity sensor is not affected by condensation, fog, high humidity, or contaminants

General Specifications

Accuracy, RH:RHP-2XXX ±2% 10-90% RH @ 25°CRHP-3XXX ±3% 20-80% RH @ 25°CRHP-5XXX ±5% 20-80% RH @ 25°C

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

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

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

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

Features

SensorRH range: 0-100%15 second response timeSensor recovers 100% from saturationFactory calibrated, field replaceable sensors available

Features

Wall mountOptional remote or integral LCD displayUniversal current/voltage output for humidity/temp.Resistive temp. Outputs availableReplaceable sensorsWell ventilated for more accurate measurements

Features

Duct mountWeather resistant PBT constructionDual temp./RH output

Optional display reads both temp. And RH

Field replaceable sensor cap of filterTwist-off cover, no screwsAvailable with membrane or sintered filter

Features

Outside airNEMA 4X / IP66 housingField replaceable sensorMultiple knock outs for conduitScrews anchored inside lid topAvailable w/ SS sintered filter or radiation shield

Applications

Wall mount humidity/temp.Mounted in a room – sends signal to controller on vav system to adjust amount of air flow supplied to the space

Duct mount humidity/temp.Monitors the humidity of the air after a humidifier and the humidity in return duct for economizer applications.

Applications

Applications

Outside air humidity/temp.Used to determine if additional hot or cold water is needed to feed AHU