MDM50 Portable Hygrometer

Self-contained instrument weighs only 4kg, rapid spot-check measurements to –50°C dp, T95 to –35°C dew point in <10 minutes

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Simple to use and rugged, the MDM50 high-speed portable hygrometer is the ideal tool for a wide range of on-site maintenance spot checks. The robust integral sample system and fast-response polymer moisture sensor provide a quick, accurate moisture measurement in a broad range of dew-point applications.

• Rapid spot-check measurements to -60°C dew point

• 16 hours operation between recharging

• Sample at pressure or atmospheric

• Accuracy +/-2°C dew point

• Traceable 9-point calibration certificate

• Rugged industrial design

• Compact and simple to use

• Sample connection kits

• Response to -60°C dew point in 3 minutes

Performance
Measurement Technology	Polymer Capacitive
Measurement Range	–60 to +20°Cdp
Accuracy	±2°Cdp
Response Time	T95 to -60 °C dew point in <3 minutes
Repeatability	0.5 °C dew point
Electrical Specifications
Output	User configurable over range; 4–20 mA (2-wire connection, current source)
Moisture Display/Output	Dew point
Power Supply	Rechargable NiMH battery pack with 16-hour life from full charge
Battery Charger	Universal battery charger included
Electrical Safety	EN61010-1
Operating Specifications
Operating Temperature	-20 to +50°C
Compensated Temperature Range	-20°C to +50°C
Storage Temperature	-20°C to +60°C
Maximum Operating Pressure	Low-pressure version (LP): 2 MPag (20 barg) High-pressure version (HP): 10 MPag (100 barg)
Recommended Flow Rate	1 to 5 Nl/min
Sampling System Configuration	Pressurized or atmospheric
Mechanical Specifications
Ingress Protection	NEMA Type 6*
Display Type	Flush mounted 3.5 digit red LED
Carry Case	Yellow Peli propylene case with internal storage of charger, sample tube accessories and output connector
Weight	4kg
Sample Block	Stainless steel, fully self-contained sample system with fixed orifice ports for flow control/pressure or atmospheric measurement and built-in filtration using a standard drop-in cartridge
Filter Cartridge	Removes 99.5% of particles ≥0.3μm supplied with cartridge installed. Spare cartridges are available
Sample Connections	Optional: Legris pneumatic fittings 6mm Swagelok® tube fittings 1/4” Swagelok® tube fittings
Sample tubing	Low-pressure version (LP): 2m of 6mm O/D PTFE supplied High-pressure version (HP): Metering valve and port adaptor
NOTES * NEMA Type 6 when case closed