SF6 dew point and pressure transmitter

Product description

SF6 dew point and pressure transmitter (WFS-S6DPT) adopts new material polymer film sensor technology, which not only has the advantages of high humidity response of general polymer film sensors, but also has an excellent low humidity measurement response level. The sensor circuit design can automatically compensate for drift caused by temperature, pollution, and aging, ensuring long-term reliable high-precision measurement. Combined with the high stability of the new material polymer thin film sensor technology, the recalibration period can be extended to more than two years. The innovative temperature compensation algorithm and multi-point temperature compensation calibration before leaving the factory greatly improve the temperature drift of the sensor and ensure high-precision measurement in a wide temperature range.

Product performance/advantage

New polymer thin film sensor technology and MEMS-based pressure sensor; can simultaneously monitor dew point and online pressure (jue to pressure 0 … 17 bar);

Accurate measurement up to ±2℃TD, high response speed and excellent long-term stability; anti-condensation, anti-particulate pollution, oil vapor and most chemicals;

Multi-point temperature compensation calibration before leaving the factory; excellent anti-interference ability; IP65 protection level, can provide good protection even in harsh environments; provide comprehensive sensor settings through the standard RS485 interface and powerful service software , data transmission, software upgrade and maintenance functions.

Measurement parameters

Dew point measurement range: -80...+20℃TD

Pressure measuring range: jue to pressure 0 … 17 bar

Temperature measuring range: -40 …+100°C, SF6 or SF6/N2 mixture gas density 0 … 100 kg/m3

Measurement accuracy: Dew point accuracy (air or nitrogen) ±2℃TD

Temperature accuracy: 0…+50℃ ±0.3℃ (standard) 40…0℃ and +50…+100℃ ±0.5℃ (standard)

Pressure accuracy: 23℃ ±0.3%FS pressure drift with temperature ±0.01bar/10℃,

Density accuracy: (pure SF6, 0 … 17 bar)

0 … +40℃ ±1%FS-40…+60℃ ±2%FS

Response time: 63% [90%], 20℃, 1bar(gauge), 4L/min

Dew point sensor: -50 -> -10℃TD 10 seconds [20 seconds] -10 -> -50℃TD 30 seconds [2 minutes]

Pressure response time lt; 1 s

Current output: (range can be changed) 4…20mA (3-wire)

Current output resolution 0.002mA

Current output temperature drift 0.01% of span /°C

Current output load: maximum 500ohm

Digital output: RS485 Modbus RTU

Connector: 5-pin M12.

power supply 

Normal measurement: 16…30V /30mA + 4-20mA current output

Working environment Working temperature -20…+70℃

Storage temperature -30…+80℃

Relative humidity: 0…95%RH

Sample gas flow gt;1 L/min

Pressure environment: 0…50 bar

Housing stainless steel

Protection class: IP65

Mechanical parts connection: ISO G 1/2”

Stainless steel mesh filter: filter grade 30~45um

Electromagnetic Compatibility: Complies with IEC 61326-1.