DewPro MMR31 Moisture Transmitter
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
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 |