Compound range pressure transmitters for measuring plus and minus pressures using the same device. Compound range transmittters are calibrated with the most negative reading at 4mA and the most positive reading at 20 mA.
Since the same sensing diaphragm is used to measure both the negative and the positive pressure, there is a limit to how great the ratio between positive and negative pressure can be, before the lower range of the two becomes too inaccurate. In the case of a -1 to 10 bar (-15 to +300 psi range which is accurate to 0.25%, will be accurate to only 2.5% over the vacuum range.
Gauge reference pressure transmitters can be configured to measure from -1bar (-15psi) which is approximately zero vacuum up to a positive pressure such +2 bar (+60psi). For ranges below 1 bar (15psi) the compounds range is typically bidirectionally symmetric such as -500 to +500 mbar, but it is also possible to provide ranges such as -200 to +500 mbar if required.
Products
DS200P Sanitary Low Range Pressure Gauge, Switch and Sensor - All in one electronic switch, gauge and sensor designed specifically for use in the food, drink and biomedical industry for measuring process pressures.
DMP331 Precision Pressure Transmitter - Stainless steel pressure transmitter with ranges from 100mbar up to 40 bar gauge or absolute. Special options for ATEX , SIL2 and compound ranges.
IMP Low Cost Pressure Sensor
x|act i Rangeable Flush Pressure Transmitter with LCD Readout
XMPi Process Plant Gauge and Absolute Pressure Transmitter
DS200 Combined Pressure Switch, Gauge and Sensor
Applications
-760mmHg to +20 kg/cm² pressure transmitter with HART coms - Compound range transmitter for sensing pressure from -760 mm of mercury vacuum to 20 kilograms per sq cm positive pressure with HART communication.
+/- 30 inches of water compound range pressure transmitter - Compound range pressure sensor for measuring a negative & positive gauge pressure of 30 inH2O
DP sensor for -1 to 3 bar differential water pressure and 16 bar overpressure - I am looking for a 4-20mA output DP sensor with a -1 to 3 bar differential range for use on water. The sensor will need to withstand an overpressure of 20 bar on the positive side and 1.5 bar on the negative side.
-3 to 3 psi dp range high accuracy 4-20mA air pressure transmitter for water treatment use - A high accuracy low bi-directional range differential pressure transmitter for water treatment use to measure pressure of air over a range of -3 to 3 psi differential from two 1/4”-18 NPT internal process connections, and sending the corresponding 4-20mA signal through the 1/2" NPT internal cable gland electrical connection.
-1 to +5 bar relative 4-20mA out low cost combined vacuum and pressure sensor
-2 to 2 inHg g 4-20mA out intake and exhaust air pressure sensor for building management use
-200 to 200 Pa bi-directional range 4-20mA output dp pressure transmitter for venturi tube
-3 to 4 mbar dp range 4-20mA ATEX approved biogas pressure sensor for process control use on a 1bar line
-1 to 20 bar g compound range IS 4-20mA propane pressure sensor for process control use
-0.1 to +0.1 inH2O g range 4-20mA signal air pressure sensor and display for pharmaceutical manufacturing use
-10…30 kPa g compound range inert gas pressure transmitter for ship IG system
-5 to +5 psi g low compound range 4 to 20 mA output OEM pressure sensor
- Bi-directional 15psig 4-20mA out air pressure sensor for research use
- Under and Over pressure monitoring -10…+200 mb pressure transmitter
- Hastelloy diaphragm -100 to 50 kPa g range manometer
- Compound +/-200 mb g pressure transmitter with 1/2 BSPT
- Marine and IS approved, -1 to 3 mWG compound range pressure transmitter
- -1 to 10 bar ATEX pressure sensor
- Solvent compatible +/-100mWG dp transmitter with PTFE seals
- Compound range -1 to 6 barg pressure transmitter & display
- 15,000 Pa DP Transmitter with built-in digital display
- 1000 pascal bidirectional range dry gas pressure transmitter
- Compound vacuum and pressure HART transmitter for +/- 500 mmWG
- -10 to +10 inH2O Air Pressure Sensor for Ventilation & Extraction