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Edwards WRH Active Hot Cathode Wide Range Gauge | WRH-NW25

The Edwards WRGH Active Hot Cathode Wide Range Gauge offers the ability to measure from atmosphere to 10-10 mbar with a single gauge, with accuracy and repeatability.

Measurement Range: 750.06 to 3.750 × 10⁻¹⁰ Torr
Accuracy: 1000 to 10 mbar ±30% | 10 to 1×10-8 mbar ±10%

The Edwards WRH gauge utilizes 2 measurement methods (bayard-alpert & pirani) in a single package, giving you everything you need to measure and control your system. With analogue and RS485 output available via the D-SUB connector, 2 onboard relays and easy calibration, control and monitoring is simple.

Features and Benefits

  • All in one wide pressure measurement
  • Dedicated software package included to allow full control/monitoring/modification
  • Bakeable up to 180°C
  • Analogue and RS485 output on same gauge
  • LED status indicators
  • 2 adjustable set points


Utilizing the included software, you can easily track and log your system’s performance and also make adjustments to the gauges behavior, such as setting the set points or changing the output scaling. This gauge is the perfect companion for many applications, from R&D institutes to high end mass spectrometry and through to general industry.

Broad Range Vacuum Gauging

Broad range vacuum gauges are the best choice when the pressure needs to be measured over a wide range and when good accuracy is needed across the whole range. Reliable vacuum gauges are essential to ensure your system’s accuracy and control. Our vacuum gauging solutions include the WRG Series Cold Cathode Combination Gauge, AIM Series Cold Cathode Gauge, and APG Series Pirani Gauge.

DigiVac Recommendations

DASH Portable Capacitance manometer Gauge. The DigiVac Bullseye DASH is the first portable high vacuum display and capacitance manometer gauge in the world; it also powers and displays CM readings and contains patented vacuum graphing technology.

FYRA Vacuum Controller | Multi-Gauge Controller with Touchscreen | ATM to High Vacuum | UL/CSA/CE. The FYRA is a versatile vacuum controller with a touchscreen or dial interface, the ability to measure and control from atmosphere to high vacuum, and the capability to drive different types of sensors. Measurement range is sensor dependent (1000 Torr (10+3) down to 10-10 Torr). Available as Bench top, Panel Mount or Rack Mount.


Data Sheet | Instruction Manual | Brochure

Technical Specifications

General Product Information
Connection Vacuum Inlet Flange
DN 25 ISO-KF (NW25)
Weight 0.475 kg
Supply Voltage DC 20-30V
Dimension Length 2.72 in
IP Rating IP40
Supply Frequency DC Voltage
Dimension Height 5.63 in
Dimension Width 2.72 in
dimensionsCombinedLengthWidthHeight 2.72 in
2.72 in
2.72 in
Connection Power
DSUB 15-PIN – Male
Environmental Conditions
Temperature Ambient Operation Max 60 °C
Temperature Ambient Operation Min. 5 °C
Temperature Ambient Storage Min. -40 °C
Temperature Ambient Storage Max. 65 °C
Product Pressure Range
High Vacuum – 1*10-3 – 1*10-7 mbar
Ultra High Vacuum – 1*10-7 – 1*10-11 mbar
Medium Vacuum – 1 mbar – 1*10-3 mbar
Principle Of Measurement
Hot-cathode (Bayard Alpert) Pirani combination vacuum gauge
Material of Construction
Material Exposed To Vacuum
Stainless steel 1.4307; tungsten; nickel; glass; platinum; iridium; yttria oxide
Material Filament Platinum/Iridium
Performance Data
Measurement Uncertainty
1000 to 10 mbar ±30%
10 to 1×10-8 mbar ±10%
Power Consumption Max
Max 8W, 9W for degas, 0.8W for relays
Pressure Measurement Max. 750.06 Torr
Pressure Measurement Min.. 3.750 × 10⁻¹⁰ Torr
Connectivity – Communication Interface
Communication Interfaces Customer RS485 (serial)
0-10 V (analog output – linear)
Connection electrical comms interface connector
DSUB 15-PIN – Male
Operation Conditions – Limitations
Temperature Baking Max. 180 °C
Variant Gauges WRH

Product Inquiry

Edwards WRH
Edwards WRH-NW25 | Active Hot Cathode Wide Range Gauge (WRH) | 750.06 to 3.750 × 10⁻¹⁰ Torr