DewPro MMR31 Moisture Transmitter

Product Options

Overview

The DewPro MMR31 loop-powered moisture transmitter represents a simple, cost-effective solution for mid-range moisture measurements. The DewPro MMR31 uses a proven polymer capacitive sensor to provide a measurement range of 0 to 100% RH with an accuracy of ±2% in the range of 0 to 90% and ±3% in the range of 90 to 100%. A patented second isolated loop for temperature measurement is also available. The optional integrated display with user interface provides full programming and diagnostic capability. In addition, the unit is available with FM approval for hazardous area use.

The DewPro MMR31 provides a wide range of process humidity measurements, including relative humidity, dew point temperature, absolute humidity, and mixing ratio. These key parameters will help monitor and control critical processes. Whether you need to improve product economy, increase product quality, maintain comfort levels, or preserve the properties of stored foods or other supplies, the DewPro MMR31 allows application flexibility.

Manufactured by: Panametrics
Model: DewPro MMR31 Moisture Transmitter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance
  • IoT Cloud Compatible

Specification

Sensing element Silicon-based polymer, capacitance principle, IC electronics
RH range 0 to 100%
RH accuracy at 77°F (25°C) ±2% in the range of 0% to 90%
±3% in the range of 90% to 100%
Dew point range 5°F to 185°F (-15°C to 85°C)
Dew point accuracy ±1.8°F (±1°C) above 32°F (0°C) dewpoint @ 25°C
Operating temperature range Process: 5°F to 185°F (-15°C to 85°C); temperature signal available with second loop
Electronics: -40°F to 185°F (-40°C to 85°C)
Temperature accuracy ±0.9°F (±0.5°C)
Absolute humidity range 1 to 350 g/m3
Mixing ratio range 1 to 830 g/kg
Maximum operating pressure 250 psia (17 bar)
Filter element: 100 microns sintered stainless steel
Outputs Loop current 4 to 20 mA, 16 :A resolution. Optional output for temperature
Hardware selectable units % RH, dew point temperature in °F or °C, absolute humidity in g/m3, or mixing ratio in g/kg
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
Probe tube 316 stainless steel, 1/2 in (12.7mm) diameter, insertion length 3.0 in (75mm) to 5.9 in (150mm), adjustable
Typical probe mounting 1/2 in tube x 1/2 in NPT-M or 1/2 in tube x G 1/2 compression fitting
Weight 3.3 lb (1.5 kg)
European compliance Complies with EMC Directive 2004/108/EC and PED 97/23/EC for DN<25
Hazardous (classified) location option FM approved XP-IS Class 1, Div. 1 Groups A, B, C and D Type 4X T5 Ta=60°C