DewPro® MMY30
Dew point transmitter

The DewPro MMY30 is a loop-powered transmitter with4 to 20 mA output. The DewPro MMY30 is specificallydesigned to measure dew point or ppm in gases atline pressure or atmospheric pressure. The planar
aluminum oxide sensor provides excellent corrosion
resistance, longer calibration stability, quick response
times, and an exceptionally low temperature coefficient.
The optional integrated display with user interface
provides full programming and diagnostic capability.
The DewPro MMY30 features an integral flow cellfor filtration and flow regulation making it ideal formonitoring the moisture content in various processenvironments. Several options are available for theprocess connection allowing easy installation ofthe transmitter. Applications include desiccant airdryers, pipeline natural gas and industrial gases.

Features• Loop-powered, 4 to 20 mA transmitter• Fast response planar aluminum oxide sensor• Integral filtering and flow regulation• Trouble-free indoor or outdoor mounting• Field validation with the MMY245 moisture analyzer• Microcontroller electronics in Type 4X/IP67 enclosureOptions• Integrated display with user interface• FM approved intrinsically safe/explosion-proof,
Class I,II,III, Division 1 and 2, Groups A,B,C,D,E,F&G
hazardous (classified) locations• English or metric fittings• External display available with loop-powered
supply and alarm contacts

DewPro MMY30 specifications
Sensing element

Planar aluminum oxide sensor
3.22 in[82]

Measurement range-130°F to 50°F (-90°C to 10°C) dew point temperature; 0 to10, 0 to 100, 0 to 1000 ppmv (fully adjustable with integraldisplay)

5.56 in[141]

M20 or
1/2 in NPTconduit orcablegland

Recommended recalibration cycle
Calibration accuracy

7.36 in[187]

12 months, depending on the application±3.6°F (±2°C) dew point at 77°F (25°C)
Maximum sensor relative humidity

3.82 in[97]

50% at dew point temperature > 32°F (0°C)
Operating and storage temperature range

1/2 in NPT-M or
G 1/2 in inlet
processconnection

Process: -40°F to 122°F (-40°C to 50°C)
Electronics: -40°F to 185°F (-40°C to 85°C)
Air bleed off at 100 psig (7 bar)Approximately 1 SCFH (28 sl/h)
Maximum operating pressure
450 psig (31 bar, 3.1 MPa)
Inlet filter: 2 micron sintered stainless steel
Helium leak-rate<10-6 mbar 1/s
Output4 to 20 mA loop-powed, 16 :A resolution
Flow block
316 stainless steel with 1/2 in MNPT or G 1/2 thread(DIN ISO 228)
Wrench width for flow block
1-5/8 in (42 mm)
Electronics
Microcontroller operated

Epoxy-coatedcastaluminum
housing thatmeets
Type 4X/IP67
requirements

DewPro MMY30 with display option

Optional display
Four-digit numeric display with bar graph and matrix
position indication. Four user interface keys for unit
selections, output adjustments and ranging.
Power supply
24 VDC nominal, 12 to 30 VDC range
Protection
Type 4X/IP67
Weight4.4 lb (2 kg)European compliance
Complies with EMC Directive 89/336/EEC and PED 97/23/EC
for DN<25
Optional certifications/approvals• FM IS Class I,II,III, Division 1, Groups A,B,C,D,E,F&G, T5• FM XP-IS Class I, Division 1, Groups A,B,C&D, T5• FM NI Class I, Division 2, Groups A,B,C&D, T4A DIP Class II,III,Division 1, Groups E,F&G, T5• ATEX and IECEx
Ex db IIC T6 GbEx tb IIIC T85°C Db
IP66

Panametrics, a Baker Hughes Business, provides solutions in
the toughest applications and environments for moisture,oxygen, liquid and gas flow measurement. Experts in flaremanagement, Panametrics technology also reduces flareemissions and optimizes performance.
With a reach that extends across the globe, Panametrics’
critical measurement solutions and flare emissions
management are enabling customers to drive efficiency
and achieve carbon reduction targets across criticalindustries including: Oil & Gas; Energy; Healthcare; Water andWastewater; Chemical Processing; Food & Beverage andmany others.
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