RH CAL Relative Humidity Calibrator
Portable Relative Humidity Calibration System with Primary Method Traceability
Starting at: $16,250.00
The RH CAL Relative Humidity Calibrator from Edgetech Instruments is a microprocessor‑based, programmable humidity calibration system designed for both metrology laboratories and on‑site field calibration. Unlike conventional humidity calibration systems, the RH CAL is entirely self‑sufficient, requiring no compressed air or water connection, making it a truly portable relative humidity calibrator.
Using Edgetech Instruments’ primary‑method chilled mirror dew/frost point measurement technology, the RH CAL delivers NIST‑traceable accuracy for relative humidity, temperature, and dew/frost point calibration. Temperature and relative humidity are controlled independently, allowing users to perform calibrations at conditions that are not constrained by ambient temperature.
At the heart of the system is an integral D2 chilled mirror sensor and precision temperature probe located directly in the sample chamber. Combined with Automatic Balance Control (ABC) and volumetric proportional control valves, the RH CAL generates, stabilizes, and maintains precise humidity levels with fast response and exceptional stability.
Manufactured and supported in the USA, the RH CAL is delivered standard with a multi‑point, ISO/IEC 17025:2017‑accredited, NIST‑traceable calibration certificate.
Key Features
| Feature | Description |
|---|---|
| Calibration Method | Primary-method chilled mirror dew/frost point measurement |
| Relative Humidity Range | 5% to 95% RH |
| Temperature Range | 10 °C to 50°C |
| Dew/Frost Point Range | -40 °C to +60°C (with D2 sensor) |
| RH Accuracy | $0.5% RH |
| Temperature Accuracy | $0.1 °C |
| Dew/Frost Point Accuracy | ÷0.2°C nominal |
| Control Scheme | Independent RH and temperature control using volumetric proportional valves |
| Chilled Mirror Sensor | D2 primary-method chilled mirror with integral PRT |
| Temperature Sensor | 3-wire platinum resistance thermometer (100 at 0°C) |
| Automatic Balance Control | Automatic correction for mirror contamination |
| Outputs | Analog (0-5 Vdc or 4-20 mA), RS-232C |
| Display | Multi-line graphical LCD |
| Power Requirements | 100-240 Vac, 50-60 Hz, 150 W maximum |
| Sample Flow Rate | 1 L/min (2.0 SCH) nominal |
| Operating Temperature | Control unit: 0°C to +50°C |
| Enclosure | Ultra-high-impact structural copolymer carrying case |
Primary‑Method Accuracy Uses chilled mirror dew/frost point measurement for true, drift‑free humidity traceability. Fully Self‑Sufficient & Portable No compressed air, water, or external utilities required, ideal for lab or field calibration. Independent Temperature & RH Control Calibrate at precise environmental conditions regardless of ambient surroundings. Fast Response & Superior Stability Integral chilled mirror sensor and proportional valve control deliver rapid stabilization and repeatable results. Built‑In Traceability Delivered standard with an ISO/IEC 17025:2017‑accredited, NIST‑traceable calibration certificate.
The RH CAL relative humidity calibration system is designed for demanding calibration environments, including:
Metrology & Calibration Laboratories
Primary‑method calibration of RH, temperature, and dew/frost point instruments.
On‑Site Field Calibration
Portable validation of humidity and temperature sensors without external utilities.
Manufacturing & Quality Assurance
Calibration of humidity transmitters used in regulated or controlled environments.
Environmental & Climate Testing
Verification of sensors used in chambers, cleanrooms, and controlled atmospheres.
OEM Sensor Development
High‑accuracy reference system for sensor characterization and validation.
,Q: What makes the RH CAL different from salt‑based calibrators?
A: The RH CAL uses a primary‑method chilled mirror sensor for direct dew/frost point measurement, delivering significantly higher accuracy and faster response than salt‑based systems.
Q: Does the RH CAL require compressed air or water?
A: No. The system is completely self‑sufficient, requiring only electrical power.
Q: Can temperature and humidity be controlled independently?
A: Yes. RH CAL independently controls temperature and relative humidity, allowing flexible calibration protocols.
Q: Is the system NIST traceable?
A: Yes. Each RH CAL is delivered with a multi‑point, ISO/IEC 17025:2017‑accredited, NIST‑traceable calibration certificate.
Configure Your System
Need a custom configuration? Edgetech Instruments can help you tailor a solution.
Call 978‑310‑7760 or request a quote to configure your relative humidity calibration system.
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