Dwyer Instruments RP1 | Thermo hygrometer humidity & temperature probe with coiled cable
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Part No. RP1 | Humidity & Temperature Probe
Product Overview
The Dwyer RP1 is a wired thermo-hygrometer probe designed for use with the Dwyer Model 485B base unit. It measures relative humidity and temperature and enables the compatible base unit to derive dew point and wet bulb temperature readings for HVAC surveys and environmental monitoring.
The probe covers 0-100% RH, non-condensing, with ±2% RH accuracy at 25°C across the 10-90% RH range and ±4% RH accuracy at the specified extremes. Temperature measurement covers -29 to 60°C (-20 to 140°F) with ±0.54°F accuracy.
An 8-inch (203 mm) insertion depth allows the RP1 to reach into suitable ductwork and conditioned spaces. The coiled cable provides practical flexibility during field measurements, while the rubber-overmolded housing and protective caps are designed for routine site use.
When connected to the 485B, the RP1 supports humidity surveys where technicians need to assess temperature, relative humidity, dew point and wet bulb conditions. Manual and automatic data logging on the compatible base unit can also be used for surveys and trend monitoring.
The RP1 weighs 0.8 lb and is CE and RoHS approved. It is suited to HVAC engineers, facility teams and service contractors checking humidity conditions in ducts, conditioned spaces, cold rooms and other environments where moisture control is important.
Key Benefits
- 0-100% RH non-condensing measurement range for broad humidity monitoring.
- ±2% RH accuracy at 25°C across the specified 10-90% RH range.
- -29 to 60°C temperature range with ±0.54°F accuracy.
- Dew point and wet bulb readings derived through the compatible 485B base unit.
- 8-inch (203 mm) insertion depth for suitable duct and space measurements.
- Coiled cable provides flexibility during field surveys.
- Rubber-overmolded housing with protective caps for routine site use.
- Manual and automatic data logging when paired with the Dwyer 485B.
- CE and RoHS approved for applicable conformity requirements.
Who This Product Is Best For
- Owners of a Dwyer 485B who need to add humidity and temperature measurement.
- HVAC engineers checking coil, cooling and dehumidification performance.
- Facility teams investigating humidity and condensation conditions.
- Technicians monitoring cold rooms and controlled spaces.
- HVAC and indoor air quality professionals performing humidity surveys requiring RH, dew point and wet bulb data.
How to Use / How It Works
- Connect the RP1 probe to the compatible Dwyer 485B base unit.
- Remove the protective cap and position the probe at the required measurement location.
- Insert the probe up to the specified 8-inch (203 mm) depth where appropriate.
- Allow the readings to stabilise, then observe relative humidity and temperature.
- Use the 485B to obtain derived dew point and wet bulb readings and record measurements manually or through automatic logging.
Frequently Asked Questions
Which instrument does the Dwyer RP1 work with?
The RP1 is designed for use with the Dwyer Model 485B base unit.
What humidity range does the RP1 measure?
It measures 0-100% RH, non-condensing. Accuracy is ±2% RH at 25°C from 10-90% RH and ±4% RH at the specified 0-10% and 90-100% RH ranges.
Does the RP1 measure temperature?
Yes. The RP1 measures temperature from -29 to 60°C (-20 to 140°F) with ±0.54°F accuracy.
Can the RP1 provide dew point and wet bulb readings?
Yes. When connected to the compatible 485B base unit, dew point and wet bulb temperature are derived from the probe's humidity and temperature measurements.
How deep can the RP1 be inserted?
The probe has an 8-inch (203 mm) insertion depth, making it suitable for appropriate duct and space measurement locations.
Can readings be logged with the RP1?
Yes. When paired with the Dwyer 485B, the system supports manual and automatic data logging for measurement surveys and trend checks.
Is the RP1 suitable for duct humidity measurement?
Yes. Its 8-inch insertion depth and humidity/temperature measurement capability make it suitable for compatible duct and conditioned-space surveys.
Is the Dwyer RP1 supplied as a complete meter?
No. The RP1 is a probe designed for the Dwyer 485B base unit. Confirm your base-unit model before ordering.
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Get the genuine Dwyer RP1 thermo-hygrometer probe with free Saudi Arabia shipping.
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