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Model Ex

alphamoisture
S Y S T E M S

Intrinsically Safe Portable Dewpoint Meter

Features :-

Intrinsically Safe - ATEX Ex ia IIC T3 / T4 Ga
Overall Range -110°C to +20°C Dewpoint
User Friendly - Simple Operation

Guaranteed accuracy +2°C Dewpoint
Portable - Fully Self Contained
Self-Diagnostics on Start-up

Digital Indication in °C (°F scale optional)
Stainless Steel Couplings

"C" Type Disposable Batteries

Excess of 150 Hours of Continuous Operation
Desiccant Dry-Down Chamber For Rapid
Measurements

Model Ex is a fully self-contained portable hygrometer
from Alpha Moisture Systems which will deliver
dependable moisture measurement in industrial and
laboratory applications. Designed with the operator in
mind, Model Ex is extremely easy to use and the
microprocessor technology ensures accurate and reliable
readings over long periods with little or no maintenance.
Model Ex is certified intrinsically safe to Ex ia IIC T3/T4
Ga for use in hazardous areas without the need for any
additional accessories.
Designed to operate at
atmospheric pressure, Model Ex is available in a total of
eight different ranges, encompassing an overall range from
-110°C to +20°C dewpoint.

Sensor surrounded
by desiccant

sensor exposed
to gas sample

sample
gas inlet

sample
exhaust

sensor

Dry-Down
Position

Read
Position

figure 1

Desiccant Head assembly

Model Ex is supplied ready for use with batteries installed,
calibration certificate traceable to National and
International Humidity standards, two metres of stainless
steel braided PTFE sampling hose, instruction manual and
an anti-static carrying case.
Alpha Moisture Systems
Alpha House, 96 City Road
Bradford, BD8 8ES
England

To allow rapid spot checks it is essential that the measuring sensor is
kept drier than the sample to be measured. The desiccant dry-down
chamber is designed to do just this by keeping the sensor surrounded by
desiccant when the instrument is not in use, only exposing it to the
sample gas when taking measurements. At no stage is the sensor
allowed to come into contact with ambient air.

Tel

BSI

Fax

UKAS
QUALITY
MANAGEMENT

OO3

Email

+44 (0) 1274 733100
+44 (0) 1274 733200
info@amsystems.co.uk

Website www.amsystems.co.uk
1678 Model Ex Data Sheet
Issue 2