HP125 Series Relative Humidity Probe
Smart, Field-Replaceable Humidity Probe for On-Site Measurements of RH, Temperature, Dew Point & Pressure
Starting at: $1,375.00
The HP125 Series from Edgetech Instruments is a next-generation relative humidity probe designed for portable on-site measurements in industrial and laboratory environments. It continuously monitors up to four key environmental parameters—relative humidity, temperature, dew/frost point, and pressure—using a smart sensor tip that simplifies calibration and maintenance.
Unlike typical temperature and humidity sensor probes, the HP125 humidity probe features a field-replaceable sensor tip that stores its own configuration and NIST-traceable calibration data. Users can simply replace the sensor tip on-site in seconds, eliminating costly and time-consuming off-site recalibrations and minimizing downtime.
Whether you’re validating conditions in a compressed air system, testing in environmental chambers, or monitoring RH% and dew point in HVAC systems, the HP125 Smart Probe delivers dependable, high-accuracy performance—with flexible output options and rugged stainless-steel construction.
Key Features
| Feature | Description |
|---|---|
| Multi-Parameter Probe | Measures relative humidity, temperature, pressure, and dew/frost point |
| Smart Sensor Tip | Auto-syncs calibration and config data; replaceable in seconds onsite |
| NIST-Traceable Accuracy | RH ≤1.8%, Temperature $0.5°C, Dew Point #1°C to $2°C, Pressure +1-5 mbar |
| Analog & Serial Outputs | 0-10 VDC for each parameter, plus RS-232 reporting interface |
| Wide Temperature Range | Operates from -40 °C to + 125°C, suited for demanding industrial applications |
| Rugged, Chemical-Resistant | Stainless steel enclosure and sintered metal filter for harsh environments |
| Modular System Compatibility | Can be used standalone or with HP125-DCM or SENTRY compressed gas alarm modules |
| Custom Fittings Available | Standard ½" NPT insertion, adjustable insertion lengths, optional fittings |
Measure 4 Parameters with One Probe Simultaneously captures RH%, temperature, dew/frost point, and pressure (absolute or barometric). No Downtime for Recalibration Replace the smart sensor tip in seconds—each is pre-calibrated and ships with a NIST-traceable certificate. Built for Real-World Use Designed for in-situ measurements in compressed air systems, labs, and environmental testing setups. Modular & Flexible Works as a standalone probe or pairs with Edgetech’s HP125-DCM display or SENTRY series for alarms. Low Maintenance, Long Service Life Sintered metal filter protects sensors, which have a typical lifespan of 5+ years.
- Compressed Air Testing
- Environmental Chambers & Ovens
- Building Automation & HVAC
- Clean Rooms & Pharmaceuticals
- Energy Management Systems
- Laboratory Research & Quality Control
- Enthalpy Control & Furnace Monitoring
- Headspace & Gas Analysis Applications
Q: What is a relative humidity probe used for?
A: It measures moisture content in the air as a percentage. The HP125 also reports temperature, pressure, and dew point, making it ideal for industrial monitoring, cleanroom validation, and compressed air systems.
Q: How does a relative humidity probe work?
A: The HP125 uses a capacitive sensor that changes electrical properties with moisture content. Combined with a temperature sensor, it calculates relative humidity and dew point with precision.
Q: Is the probe field-serviceable?
A: Yes. The Smart Sensor Tip can be replaced in seconds and will auto-sync its calibration and configuration data with the HP125 probe.
Q: Can the probe be used for standalone operation?
A: Yes, it includes standard 0–10 VDC analog outputs and RS-232 serial output. It can also be paired with Edgetech’s HP125-DCM or SENTRY series.
Q: What certifications are provided?
A: Each sensor tip includes a NIST-traceable calibration certificate, and the system is manufactured in an ISO 9001:2015 and ISO/IEC 17025:2017 accredited facility.
Q: How is the HP125 probe calibrated?
A: Each Smart Sensor Tip is factory-calibrated and delivered with a NIST-traceable certificate. The tip stores its own data and syncs with the probe when inserted, eliminating the need for off-site recalibration.
Q: What accessories are available?
A: The HP125 can be paired with the optional HP125-DCM Display Control Module or used with Edgetech’s SENTRY series for alarm and monitoring functions in compressed gas systems.
Ready to Upgrade Your On-Site RH Monitoring?
Contact Edgetech Instruments today to configure the right relative humidity and temperature probe system for your application.
Request Price & Availability
