Precise dew point measurement of SF6

Precise dew point measurement of SF₆

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MBW 973-SF6

zero emmission measurement
measurement of dew point & SO₂
fully automated SF₆ measurement

Measuring dew point of Sulphur hexafluoride (SF₆) with zero emissions.

The MBW973-SF6 analyser allows measurements to be made without venting the measured gas. The system combines an integral pump and cylinder, passing sample gas through the measurement head to be stored. When testing is complete, the gas can be returned by pumping it back into the gas system.

Sulphur Dioxide (SO₂) measurements

An optional and integrated electrochemical cell monitors SO₂ levels with a measurement range of either 0 to 100 ppm_v or 0 to 500 ppm_v.

SF6 SO2 measurement MBW973 SF6

The precision chilled mirror device to accurately determine dew point, and a simultaneous sulfur dioxide measurement combine to indicate sulfur hexafluoride (SF₆) purity.

GENERAL
Measuring range
Frost/Dew point	-50 to +20 °C
Humidity content by volume	40 to 20,000 ppm
Humidity content by weight	5 to 2,500 ppm
Volume SF₆	80 to 100 %
Inlet pressure	120 to 1,000 kPa abs.
Accuracy
Frost/Dew point	≤ ± 0.5 °C
ppm_v/ppm_w	≤ ± 1 ppm +6 % of reading
Volume SF₆	≤ ± 0.5 %
Pressure	≤ ± 3 kPa
Standard Features
Digital I/O	RS-232
Thermoelectric mirror cooling	3-stage
Mirror Temperature Sensors	RTD (Pt100)
Display	5.7" LCD with touch screen
Internal gas tubes	Stainless steel 316L / FEP
SO₂ preparation	Mechanically and electrically prepared, measurement cell cover fitted
Gas connections	Self-sealing quick connect fitting (Swagelok® QM series)
Couplings	Self-sealing SF₆ coupling DN8 (VK/F-02/8) and DN20 (VK/F-02/20)
External sample gas tube	Self-sealing 6 m stainless steel armoured PTFE tubing
ORIS	Optimum Response Injection System
Transport case	Custom fit foam lined Peli 1620
Power cable	2.5 m
Operating instructions	English, German, French, Italian or Spanish
Calibration certificate	Pressure calibration, 2-point dew/frost point, 3-point %volume SF₆
Optional Features
Internal SO₂ module	Measuring range	0 to 100 ppm or 0 to 500 ppm
	Accuracy	< 2 % of range
	Sensitivity drift	≤ 5 %/year
	Lifetime	2 years in normal operation
Additional Information
Pump back pressure maximum	900 kPa
Cooling	Air
Operating conditions	-10 to +40 °C, maximum 98 %rh non-condensing, altitude up to 2000 m
Storage conditions	-20 to +50 °C
Outdoor use	Permissible, instrument must be protected against exposure to water
MECHANICAL
	Instrument		In Transport Case
Width	420 mm		650 mm
Height	155 mm		370 mm
Depth	390 mm		510 mm
Weight	16.5 kg		32 kg
ELECTRICAL
Supply voltage	100 to 120 VAC / 200 to 240 VAC, 50/60 Hz (auto switching)
Supply voltage fluctuations	up to ±10 % or nominal voltage / overvoltage category II Rated pollution degree 2
Power consumption	200 Watt
All specifications subject to change