DewPro_MMY35

DewPro MMY35 Dew Point Transmitters

The DewPro MMY35 is a compact, trace moisture transmitter probe designed to measure the dew point of dry air systems. The microprocessor-controlled DewPro MMY35 provides a 4-20 mA output signal that corresponds to the measured dew point.

The MMY 35 provides a measurement range of -90°C to +10°C (-130°F to +50°F) with ± 2°C (± 3.6°F) accuracy, and a proven, planar capacitive sensor. The instrument can be configured and controlled with a PC using DewPro Communication software. This software permits the user to set the dew point range, adjust the loop current and read the dew point. The MMY35 can interface with a PC via an 8 pin connector using 2 pins for the RS 485 communication and 2 pins for the current loop connected to 24 VDC power supply. All wetted parts are of 316 stainless steel except the sensor and its ceramic feed-through mount. The housing is of anodized aluminum. A three meter long, eight-core cable is standard.

Features:

4 to 20 mA loop-powered dry air streams

5.2" long, .55 lb. cable connected probe

Planar capacitive gold/aluminum sensor

Designed to meet the needs of OEM customers

Options:

DewPro Communication Software

Longer eight-core connection cable (specify length)

　

原廠目錄下載 (PDF Format, 1 pages, 132 KB.)
DewPro MMY35 Dew Point Transmitters

SPECIFICATIONS

Supply Power: 24 VDC nominal (9 to 32 VDC)

Current Loop: 4 mA to 20 mA corresponding to a standard dew point range of -90°C to +10°C (-130°F to +50°F)

Communication: RS 485, DewPro protocol

Cable Connector: Rating IP 65; Pins 1 (+) (red) and 2 (-) (black) = current loop supply power; 3 (-) (brown) and 4 (+) (yellow) = RS 485 communication. Pins 5 through 8 (green, white, orange, blue) are not being used for the loop-powered version.

Sensing Element: Planar gold, aluminum oxide, capacitance principle

Calibration Range: -90°C to +10°C (-130°F to +50°F) dew point temperature

Recommended Recalibration Cycle: 6 to 24 months, depending on application and required accuracy

Calibration Accuracy: ± 2°C ( ± 3.6°F) dew point at 20°C (68°F) ambient temperature

Repeatability: ± 1°C ( ± 1.8°F)

Maximum Relative Humidity: 50% at dew point temperatures >0°C (32°F)

Temperature Coefficient: < 0.2°C/°C (< .36°F/°F)

Ambient and Storage Temperature: -40°C (-40°F) to +50°C (+122°F)

Nominal Operating Temperature: -20°C (-4°F) to +40°C (+104°F)

Maximum Operating Pressure: 150 psig (10 bar)

Helium Leak-rate: < 10-6 mbar l/s

Maximum Gas Velocity: 50 m/s at 1 bar, 5 m/s at 10 bar

Probe Mounting Adapter: Stainless steel 316 (1.4571) with G 1/2 thread (DIN/ISO 228) and O-ring seal

Rating: IP 40

Wrench Width: 30 mm

Protection from Particles: Protective cap with 10 micron filter

Weight: 0.55 lbs. (250 grams)

Ordering Information MMY35
1 2 3 4

1 Certificate
R Standard (not certified)

2 Process Connection
G Thread G 1/2 to DIN ISO 228

3 Housing
B Bendix plug-in connection

4 Sensor Protection
2 Protection tube with 10(m fine filter