GE Sensing MG101 Specifications

GE

Sensing & Inspection Technologies

MG101

Panametrics Hygrometer
Calibration System

The MG101 hygrometer calibration system is used
to generate precise, repeatable levels of water
vapor in a carrier gas stream. This primary dew/
frost point generation system achieves an accuracy
of ±1.8°F (±1°C) within a continuously adjustable
range.

The MG101 employs the elementary principle of gas
dilution. Dry gas is piped into the system, where it is
divided into two streams. One stream is saturated
with water vapor at a known temperature, while
the other stream remains dry (see ow schematic
on next page). The two streams are then mixed. The
saturated stream is diluted with varying amounts of
the dry gas to produce the desired gas/water vapor
mixture.

The MG101 employs either single stage or two
stage dilution to generate gas with a dew/frost
point range of -103°F (–75°C) to 18°F (10°C) at 20°C
ambient temperature. The MG101 may be used to
verify a wide variety of instruments, including GE
Sensing aluminum oxide moisture probes. When
used with a chilled mirror reference, the system
provides an economical calibration system.

Features

• Generates precise, repeatable levels of
water vapor in a carrier gas

• Generation range is -103°F to 50°F (–75°C
to 10°C) frost/dew point (at typical ambient
temperatures)

• Accurate eld calibration/verication of
moisture sensors

• No power required to operate

• Requires dry nitrogen source gas

Applications

Portable eld calibration system for verifying
moisture and humidity sensors

MG101 Specications

Generated Dew/Frost Point Temperature Range

–103°F to 50°F (–75°C up to 10°C) below ambient
temperature (equivalent to 1.2 ppmv to 12,120 ppmv
in gases at one atm at 68°F (20°C) ambient temperature)

Accuracy

±1.8°F (±1°C) dew/frost point temperature

Dry gas,

rst dilution

owmeter

Dry gas

inlet

Wet gas

owmeter

Vent valve

Dry down

valve

5μ lter

Saturator

bottle

Temp

Gas outlet

Dry gas,

second
dilution

owmeter

Wet gas,

diluted,

owmeter

Inlet Gas Supply

Nitrogen preferred, supply gas must be 45°F (25°C) drier
than driest dew/frost point temperature to be generated

Maximum Flow Rate

19.5 SCFH (9.2 Liters/minute)

Inert Gas Supply Pressure

55 psig to 60 psig (4 bar to 5 bar)

Outlet Pressure

Ambient to 10 psig (1 bar), adjustable

Power Requirements

None

Dimensions (w x h x d)

12 in x 18 in x 6 in
(304.8 mm x 457.2 mm x 152.4 mm)

Weight (Dry)

25 lb (11.3 kg)

Pressure

regulator

MG101 with Moisture Image® Series 1 analyzer to demonstrate

Flow schematic

moisture sensor calibration

Inlet and Outlet Connections

1/4 in Swagelok® tube tting

www.gesensinginspection.com

920-018C

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