DewPro MMR31

DewProR MMR 31

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DewPro MMR31 Humidity Transmitter

The MMR 31 Loop Powered Moisture Analyzer represents a simple, cost-effective solution for mid-range moisture measurements. Whether you need to improve product economy, increase product quality, maintain comfort levels, or preserve the properties of stored foods or other supplies, the MMR 31 allows application flexibility. The MMR 31 can also be quickly recalibrated in the field using salt bottles. A second, isolated loop for temperature is optional. (U.S. patent # 5,677,476)

Features:

Economical, versatile analyzer measures relative humidity, dew point, absolute humidity, mixing ratio.
Proven polymer capacitive sensor for fast response and calibration stability.
0 to 100% RH or dew point measurement range of -15°C to +85°C.
Simple, two-wire connection (4 to 20 mA).
Easy mounting with standard compression fittings.
Simple field recalibration with salt bottles.
NEMA 4X (IP67) Enclosure.

Options:

Wall mount kit.
DewPro Communication Software.
Integral Display with user interface.
Second isolated loop (patented) for temperature.
English or Metric fittings.
External display available with loop-power supply and alarm contacts.

Specifications

Sensing Element: Silicon-based polymer, capacitance principle, IC electronics.

RH Range: 0 to 100%.

RH Accuracy: ±2% in the range of 0% to 90% ±3% in the range of 90% to 100%.

Dew Point Range: -15°C to +85°C. (+5°F to +185°F).

Dew Point Accuracy: Better than ±1°C (±1.8°F) if T>30°C. (86°F) and RH>40%, T<30°C (86°F) and RH>30%.

Repeatability: ±1°C (±1.8°F)

Operating

Temperature Range: -15°C to +85°C (+5°F to +185°F); temp. signal available with second loop.

Temperature Accuracy: 0.5°C (±0.9°F).

Absolute Humidity

Range: 1 to 350 g/m3.

Mixing Ratio Range: 1 to 830 g/kg.

Maximum Operating

Pressure: 250 psia (17 bar).

Outputs: Loop current 4 to 20 mA, 16 μA resolution Optional output for temperature.

Electronics: Microprocessor controlled.

EMI/RFI Protection: Meets IEC 801-1 through 6.

Moisture Units: % RH, dew point temperature in °F or °C, absolute humidity in g/m3, or mixing ratio in g/kg, hardware selectable.

Power Supply: 24 V DC nominal, 12 to 32 V DC range, or tolerance +8 V DC to -15 V DC.

Protection: NEMA 4X (IP 66).

Probe Tube: 316 SS, 1/2" (12.7mm) diameter, insertion length 3.0" (75mm) to 5.9"(150mm), adjustable.

Typical Probe

Mounting: 1/2" tube x 1/2" MNPT or 1/2" tube x G. 1/2 compression fitting.

Weight: 4.4 lbs (2 kg).