The loop-powered Panametrics DewPro MMR31 moisture transmitter is a simple, cost-effective solution for mid-range moisture measurements . It 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, with both loops powered by a single supply.

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

The MMR31 is available with an optional integrated display with user interface to provide full programming and diagnostic capability. Simple field recalibration is possible using salt bottles. The instrument offers various process connection options and is available with standard certification (non-certified) or other certifications as specified .

Key Features

• RH range: 0 to 100%
• RH accuracy: up to ±2% (0-90%), ±3% (90-100%)
• Dew point range: -15 to 85°C (5 to 185°F)
• Dew point accuracy: ±1.8°F
• Temperature range: -15 to 85°C (5 to 185°F)
• Temperature accuracy: ±0.5°C (±0.9°F)
• Proven polymer capacitive sensor
• One or two isolated 4-20mA loops
• Patented second loop for temperature powered by same supply
• Optional four-digit display with bar graph
• Four user interface keys
• Simple field recalibration with salt bottles

Applications

• HVAC systems
• Industrial process control
• Pharmaceutical manufacturing
• Food storage monitoring
• General purpose humidity measurement