973-SF6 Analyzer

RH Systems 973-SF6 Analyzer


The RH Systems Model 973-SF6 Analyzer was specifically designed for measurement of humidity and SF6 purity in gas insulated switchgear systems. Humidity measurement data is displayed in ppmv, ppmw and dew/frost point at either system pressure or standard pressure. Purity measurement is displayed directly in % volume SF6. Both the humidity and purity measurements utilize accurate and reliable condensation techniques.

Gas Recovery

The 973-SF6 is equipped with a gas recovery system that stores the sampled gas during the measurement process in its internal storage tank. After completion of the measurement, the stored gas may be pumped back into the original compartment or into another container. Starting and ending system pressures are also measured.

Easy, Automated Usage

User configurable via the full color active matrix LCD touch screen, the 973-SF6 may be configured for measurement of humidity, % volume SF6, or both, with either automatic or manually initiated pump back. Using the bi-directional RS-232 communications port, all measurement data may be easily transferred into a PC for electronic storage and report generation.

Verifiable Calibration

Easily check the calibration at any time using the built-in Ice Test function which provides instant verification of system accuracy and integrity.

Connect and Go

The system is supplied ready for immediate use complete with industry standard quick connect fittings and sampling tube.


We reserve the right to change design or technical data without notice.


Measuring range:
Frost/Dew Point -55 …+20°C at atmospheric pressure
Humidity content by volume 20 …20,000 ppmv
Humidity content by weight 2.5 …2500 ppmw
% Volume SF6 80 …100%
Pressure 1.25 …10 bar abs.
Frost/Dew point ±0.5°C
ppmv/ppmw ±6% of reading
% Volume SF6 ±0.5%
Pressure ± 3 kPa (± 0.4 PSIA)
Frost/Dew Point ± 0.2°C
% Volume SF6 ± 0.3%
Pressure 0.1% FS
Thermoelectric Mirror cooling: 3-stage
Cooling: Air
Display: Active Matrix Color Graphic LCD
Digital I/O: RS-232
Gas couplings: Quick connect fitting
Mirror temperature sensor: PRT-100
Sample gas pressure: 1 …30 bar
Sample gas flow rate: 0.5 …1 l/min
Operation temperature: -10 …+40°C
Storage temperature: -20 …+50°C
Ambient humidity: 90% RH max., non condensing in operation
Voltage: 100…240 VAC, 50/60 Hz
Power consumption: 200 Watt
Width: 440 mm (490 mm with transport case)
Height: 155 mm (360 mm with transport case
Depth: 410 mm (650 mm with transport case)
Weight: 15 kg (27 kg with transport case)