Michell Instruments Easidew Portable Specifications

Portable Instruments

Easidew Portable

Portable Universal Hygrometer

Simple to use and rugged, the Easidew portable hygrometer is the ideal tool for a wide range of
on-site maintenance spot checks and dry dew-point online measurements. The robust integral
sample system and wide measurement range ceramic metal-oxide moisture sensor provide an
accurate moisture measurement in a broad range of dew-point applications.

Highlights

• Spot-check measurements to -60°C dew point

• 16 hours operation between recharging

• Sample at pressure or atmospheric

• Accuracy +/-2°C dew point

• Traceable 13-point calibration certicate

• Rugged industrial design

• Compact and simple to use

• Sample connection kits

• Online moisture measurements -100 to +20°C
dew point

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Applications

• Compressed air

• Gas generators

• Railway pneumatics

• Plastic moulding dryers

• Additive manufacturing

• Instrument air

Portable Instruments

Easidew Hygrometer

The Universal Moisture Portable

The Easidew Hygrometer has been designed to make
dew-point spot checks down to -60°C dew point, and
online measurements across -100 to +20°C dew point,
as simple as possible. This completely self-contained
instrument weighs just 4kg and is delivered ready to use.
Simply connect your sample gas to the Quick Connect (or
optional Swagelok®) ttings, turn on the instrument and it
will begin to measure/display the dew point of the applied
sample.

Extended Field Use

The Easidew uses a rechargeable NiMH battery pack and is

delivered complete with a universal battery charger that ts

neatly into the instrument lid. It will operate for up to 16
hours on a full charge.

Fully Integrated Sampling System

The Easidew is unique among portable hygrometers. Michell
Instruments has built into the standard design, a complete
sampling system that easily allows you to measure the
dew point of any air or gas line, at up to 2 Mpa (20 barg)

pressure. The two interchangeable inlet/outlet ttings allow

you to choose between dew point measured at atmospheric
or line pressure, by simply swapping the position of the

ttings. An integrated lter housing uses standard lter

cartridges and provides 99.5% protection against particles
down to 0.3µm. Optionally, Swagelok® tube couplings can

be specied to allow operation of the unit at up to 30 Mpa

(300 barg).

Measurement Performance

Field Replaceable Integral Sensor

The ceramic metal-oxide moisture-sensing technology is
coupled with the latest microprocessor-based measurement
circuitry to produce a 13-point traceable calibrated and
interchangeable sensor transmitter module. All calibration
data is stored in the sensor memory, so on-site sensor
exchange for calibration or service can be performed quickly,
by untrained personnel.

Easy to Read

The hygrometer features an extremely clear and bright

0.5” red LED display, making it easy to determine the
dew point of your process even in dim conditions or direct
sunlight. Michell also provides a 4–20 mA analog output
for connection to a chart recorder, data-logger or computer
system, so dew-point trends can be analyzed over time.

Rugged Field-Use Design

The Easidew is rugged, and easy to carry and use. It is
small, with an ergonomic carrying handle, and weighs only
4kg. The case of the hygrometer provides NEMA 6 protection
and the outer case is covered by a lifetime guarantee, so can
be returned to the factory for repair or replacement, free
of charge.

Reproducibility and Calibration Integrity

The Easidew ceramic metal-oxide moisture sensors are
subject to a 13-point calibration, where their performance is
characterized against a fundamental reference hygrometer.
This process, and subsequent quality testing, ensures that all

sensors behave optimally before they are used in the eld.

The transmitter uses Michell’s market-leading ceramic
metal-oxide measurement technology coupled with the
latest-generation, sophisticated microcontroller electronics to
provide accurate and stable measurement across the product
life of the transmitter.

• Accuracy ±2 °C dew point

• Excellent long-term stability

Traceable Calibration

Each Easidew is supplied with a calibration traceable to
national standards (NPL & NIST) from Michell Instruments’
accredited laboratory.

Accessories and Spares

The Easidew is available with a supporting range of practical
accessories and spares that can be stored within the lid of
the portable, whilst being used on site:

• Connector ttings

• Filters

• Guards

• Tubing

• Battery pack

• Charger

Customization

If your application requires a customized portable, we have
specialized design and manufacturing capability to cover
your requirements.

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Portable Instruments

Technical Specications

Performance Specications

Measurement Range

(Non-standard ranges available on request)

Accuracy

Repeatability 0.5 °C dew point

Calibration 13-point calibration certicate traceable to national standards

Electrical Specications

Output Signal User congurable over range; 4–20 mA (2-wire connection, current source)

Moisture Display/Output

Power Supply Rechargable NiMH battery pack with 16-hour life from full charge

Battery Charger Universal battery charger included

Electrical Safety EN61010-1

Operating Specications

Operating Temperature

Compensated Temperature Range

Storage Temperature

Spot-checking: -60 to +20 °C dew point

Online monitoring: -100 to +20°C dew point

±2 °C dew point

Dew point

-20 °C to +50 °C

-20 °C to +50 °C

-20 °C to +60 °C

Maximum Operating Pressure

Recommended Flow Rate

Sampling System Conguration

Low-pressure version (LP)

High-pressure version (HP)

2 MPag (20 barg)

30 MPag (300 barg)

1 to 5 Nl/min

Pressurized or atmospheric

Mechanical Specications

Ingress Protection NEMA Type 6*

Display Type

Carry Case

Weight 4kg

Sample Block

Filter Cartridge

Sample Connections

Sample Tubing

Low-pressure version (LP)

High-pressure version (HP)

NOTES * NEMA Type 6 when case closed

Stainless steel, fully self-contained sample system with xed orice ports for ow control/pressure

Yellow Peli propylene case with internal storage of charger, sample tube

or atmospheric measurement and built-in ltration using a standard drop-in cartridge

Removes 99.5% of particles ≥0.3μm supplied with cartridge installed.

Flush mounted 3.5 digit red LED

accessories and output connector

Spare cartridges are available

Optional: Legris pneumatic ttings

6mm Swagelok® tube ttings
1/4” Swagelok® tube ttings

2m of 6mm O/D PTFE supplied

Metering valve and port adaptor

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Portable Instruments

-30.5

1/8” BSPT thread

Particulate filter
cartridge

274mm

10.8”

124mm

4.8”

250mm

9.8”

Storage pocket

for battery

charger

Storage pocket for
tubing and spare
filters

IP67 (NEMA 6)
polypropylene case

Gas in/out ports with
interchangeable fittings

Power switch, fuse and
current output socket

Easidew sensor

Easidew Hygrometer

Product Dimensions

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MDM50 Portable

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Michell Instruments Ltd 48 Lancaster Way Business Park, Ely, Cambridgeshire, CB6 3NW
Tel: [phone], Fax: [phone], Email: [e-mail], Web: www.michell.com/uk

Michell Instruments adopts a continuous development programme which sometimes necessitates specication changes without notice.
Issue no: Easidew Portable_97157_V5.2_UK_0620

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