VP Dew Point Sensor

Ren Engineering Solutions: VP Dew Point Sensor Energy Monitoring Device

Prevent high maintenance costs by monitoring and maintaining the right dew point in your system. Too much water in your system can lead to e.g. forming of rust, freezing of valves, and even product loss when the moist content is too high for your coating or paint process. Stay in control of your dew point with the VP Dew Point Sensor.
The VP Dew Point Sensor is the smart dew point meter with a large measurement range of -70..+60 ⁰C, so you can measure downstream a refrigerant type dryer as well as a desiccant-type dryer. The sensor has multiple outputs for easy connection to any management system. The alarm LED shows a critical dew point level right on the factory floor and this dew point meter has a built-in autocalibration for high accurate readings.

Efficiency Component
1. Energy Efficiency – Smart monitoring devices reduce energy demand through increased awareness of energy consumption. With smart meters, end-users can monitor, evaluate and reduce energy consumption.

Technical Information
MEASUREMENT PERFORMANCE
Sensor: Thin film polymer
Sensor: protection Stainless steel sintered filter
Calibration interval: Recommended calibration interval to confirm the specified accuracy of 2 years
Sample flow rate: No effect on measurement accuracy, only on response time
RESPONSE TIME 63% [90%] AT 20 °C | 68 °F GASTEMPERATURE AND 1 BAR (14.5 PSI) PRESSURE
-60 → -20 °C Td (-76 → -4 °F Td) 5 s [15 s]
-20 → -60 °C Td (-4 → -76 °F Td) 45 s [10 min]
DEW POINT TEMPERATURE
Measurement range: (typical) -70..60 °C | -94..140 °F
Accuracy in air or N2: ±2 °C | ±3.6 °F | ±68 °F of reading
Temperature (°C) > 12 bar: Accuracy ±4 °C | ±7.2 °F of reading
WATER CONCENTRATION BY VOLUME (PPM)
Accuracy at 20°C | 68 °F, 1 bar pressure: 1 ppm + 20% of reading
INPUTS AND OUTPUTS
Analog output (scalable): 4..20 mA
Resolution for current output: ±0.002 mA
Accuracy for current output at 20 °C: (68 °F) ±0.05 mA
Typical temperature dependence: 0.005% of span / °C
LED: For dew point level alarm and transmitter diagnostics
Digital output: RS485 2 wire, non-isolated, RS485 (Modbus RTU)
ELECTRICAL
Supply voltage with current output: 18..28 VDC
Supply voltage with RS485: 12..28 VDC
Supply voltage, in pressures over 20 bara (290 psia): 24..28 VDC or temperatures below 0 ⁰C (32 °F)
Supply current during normal measurement: Max. 10 mA + load current
Supply current during self-diagnostics: Max. 220 mA pulsed
Load for current output: Max. 500 kΩ
Load for voltage output: Min. 10 kΩ
MECHANICAL
Mechanical connection: ISO G1/2”
Housing material: Stainless steel (AISI316L)
Weight: G-thread version 90 g | 3.2 oz
Ingress Protection: IP66 | NEMA4
OPERATING ENVIRONMENT
Target gases: Non-corrosive gases
Temperature: -40..60 °C | -40..140 °F
Relative humidity Pressure: 0..100% RH 0..50 bara | 725 psia