PDM75-X3SF Portable Dewpoint Hygrometer
Drift-Free Chilled Mirror Hygrometer Built for Field-Ready Dew/Frost Point Accuracy
Starting at: $11,675.00
The Edgetech Instruments PDM75-X3SF is a rugged, portable dewpoint hygrometer engineered for industrial field use where accuracy, durability, and NIST traceability matter. Built around a primary-method, chemically resistant chilled mirror dew/frost point sensor, the PDM75-X3SF delivers drift-free accuracy, low maintenance, and reliable performance in a high-impact portable case.
The system includes the proven performance of Edgetech’s DewMaster platform—packaged for portability and configured to match your specific sampling needs. Use it as a field transfer standard, to spot check process gas dryness, monitor compressed air and dryer performance, or measure endo gas dew/frost point in heat treating environments. Choose from positive pressure or vacuum-sampling configurations, and benefit from flexible sensor mounting and multiple output options.
Looking for a more economical portable chilled mirror system?
The 1500 Portable Dewpoint Monitor offers primary-method dew/frost point measurement in a durable, compact design—ideal for calibration labs, spot checks, and general industrial use. Starting at a lower price point ($4,900), it offers great value with proven chilled mirror accuracy and optional battery-powered operation.
All Edgetech dew/frost point hygrometers are manufactured and supported in the USA in an ISO 9001:2015 registered facility with an ISO/IEC 17025:2017 accredited calibration laboratory. The PDM75-X3SF is delivered with a NIST traceability certificate.
Key Features
| Feature | Description |
|---|---|
| Measurement Method | Primary-method, chemically resistant chilled mirror dew/frost point sensor |
| Drift-Free Performance | Stable, repeatable dew/frost point readings certified to NIST-traceable standards |
| Measurement Range | +70 °C to −65 °C dew/frost point (X3SF High Efficiency; custom ranges available) |
| Air-Cooled Depression | Up to 90 °C depression with no liquid cooling required |
| Accuracy | ±0.20 °C (±0.36 °F) dew/frost point accuracy |
| Automatic Balance Control | ABC mode provides automatic correction for optics contaminants; supports unattended operation |
| Portable Industrial Enclosure | Rugged, high-impact plastic carrying case built for field use |
| Sampling Flexibility | Configure for positive pressure sample gas or sample extraction with optional vacuum pump |
| Sensor Construction | 316 stainless steel, Teflon, Viton seals; chrome mirror standard (platinum optional); flip-top mirror access |
| Display | 8-line backlit graphic LCD; displays up to 3 parameters simultaneously |
| Sample Connections | 1/4” compression fitting; integral flow meter |
| Sample Pressure | 0 to 150 psig (higher available—consult factory) |
| Sample Flow Rate | 0.5 to 5 SCFH (0.25 to 2.4 L/min) |
| Power | 90–230 VAC ±10%, 50–400 Hz |
| Outputs | Analog: 0–5 Vdc, 0–10 Vdc, 0–20 mA, 4–20 mA (user scalable); Serial: RS-232 |
| Relay Alarms | Two user-configurable Form C relays; latching or auto-reset |
| Operating Temperature | 0 °C to 50 °C (32 °F to 122 °F) |
Key Benefits
Field-Ready, Primary-Method Accuracy Get true chilled mirror dew/frost point measurement—ideal for spot checks, audits, and critical moisture verification. Designed for Harsh Industrial Use Chemically resistant sensor materials and a rugged portable case support real-world environments from plant floors to compressor rooms. Low Maintenance & Easy Mirror Access Flip-top mirror access and Automatic Balance Control reduce service time and keep performance stable. Flexible Sampling for Real Processes Choose the sampling system you need—positive pressure or extraction—so the unit matches how your gas is actually available. Integration-Ready Outputs & Alarms User scalable analog outputs, RS-232, and configurable relay alarms make it easy to connect to peripheral devices and monitoring systems.
Applications
Compressed Air & Dryer Performance
- Compressed air moisture verification
- Air brake dryer monitoring
- Spot checks for process air dryness
Heat Treating & Furnace Gases
- Endo gas dew/frost point measurement
- Furnace and heat treating environments
Industrial Processing & Manufacturing
- Fluidized bed dryers
- Plastic molding and materials processing
- Power and energy systems
Labs, Metrology & Controlled Environments
- Metrology and calibration workflows
- Laboratories and R&D test & measurement
- Clean rooms and pharmaceutical environments
Frequently Asked Questions
Q: What dew/frost point range does the PDM75-X3SF cover?
A: The X3SF High Efficiency configuration measures from +70 °C down to −65 °C dew/frost point, with up to 90 °C depression and no liquid cooling required.
Q: What makes it “industrial duty” for field use?
A: The system is built around a chemically resistant chilled mirror sensor, rugged portable enclosure, and practical sampling configurations that support real process conditions—plus low maintenance features like ABC and flip-top mirror access.
Q: Can the unit be configured for different sampling setups?
A: Yes. The PDM75-X3SF can be configured for positive pressure sample gas or ordered with an optional vacuum pump for sample extraction. Custom ranges and higher pressure options are also available.
Configure Your System
Need a specific setup for your gas line, dryer, or measurement protocol? Available options include:
- Vacuum pump for sample extraction
- Pressure transducer for automatic pressure compensation
- Serial-to-Bluetooth data acquisition
- Platinum mirror option
- Custom measurement ranges and higher pressure configurations
Call 978-310-7760 or request a quote to configure your PDM75-X3SF portable dewpoint hygrometer.
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