Michell Instruments DryCheck Specifications

Dew-Point Transmitters

DryCheck

Self-Contained Dew-Point Instrument

A simple and effi cient, self-contained dew-point hygrometer, with fi ltration and fl ow control, for
measurement of dew point or moisture content.

Highlights

• Integrated instrument and sampling system

• Simple installation

• Wide measurement range

• Dew point or moisture content

• Analog output, display and dual alarms

• IP65 (NEMA 12) enclosure

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Applications

• Compressed air dryers

• Plastic moulding

• Ozone generators

• Medical gases

• Pneumatics

• Breathing air

• Welding gases

• ... and many more

Dew-Point Transmitters

DryCheck
Self-Contained Dew-Point Instrument

Background

The DryCheck system was designed by Michell Instruments
in response to demands from customers for an economic
instrument package with good accuracy and stability, inclusive
of a comprehensive sampling system, which could be easily
installed for use in a number of dew-point measurement
applications.

In air drying and many other applications a cost effective and
reliable hygrometer that is quick and simple to install is vital to
ensure that dew-point measurement can be made at the point
of use.

Fast Response and Accurate Measurement

The DryCheck utilises the Michell Instruments Easidew Online
to measure dew point in the range –100 to + 20°C (-148 to
+68°F) dew point, or moisture content in the range 0-3000
ppm. This well-proven instrument has Michell’s advanced
Ceramic Moisture Sensor at its heart, providing accurate and
stable measurement. The calibration data for each sensor
is stored within the transmitter’s fl ash memory. This allows
Michell Instruments to offer the unique sensor exchange
scheme, keeping calibration costs and downtime to an absolute
minimum.

Integral Sampling System

The DryCheck sampling system includes a 0.3 μm particulate
fi lter element, a monolithic sampling block to house the Easidew
Transmitter, and a valve and fl owmeter for setting the sample
fl ow. The fi lter element is easily replaceable to ensure that
the sensor is protected. All components are rated to 1 MPa
(10 barg/145 psig) and the DryCheck can be confi gured for
measurement of dew point at either system, or atmospheric
pressure.

Display and Outputs

The DryCheck features an extremely clear 20 mm (¾”) red LED
display, which can be programmed to display dew point, in °C or
°F and moisture content in ppmv. The instrument also provides
a 4-20 mA output and 2 off alarm relays. All these features are
easily confi gurable by the user via the front panel of the display,
making DryCheck one of the most versatile instruments on the
market.

Simple Installation

All components are housed in a rugged IP65 (NEMA 12) rated
polycarbonate case. This can easily be wall mounted at a
convenient point close to the gas sample.

A clear cover protects the display and the sample fl owmeter.
Gas connection (gas in and gas out) is provided using “quick
connect” push-fi ttings suitable for use with 6 mm (¼”) OD
Tefl on tubing. Mains power input, and connection to the
4-20 mA analogue output, and the two user programmable
voltage free relay contacts are all easily accessible behind the
lower panel.

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