• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
SensorsONE

SensorsONE

Measurement Instrumentation Products

  • Products
  • Tools
  • Contact

Transforming a 2 wire Current Loop into a Voltage Output Signal

If you are running a signal cable over a long distance or have a spare current output pressure transmitter, it is possible to convert the output signal to a voltage type to make it compatible with voltage only input devices.

A typical current output is 2 wire 4 to 20 mA which is designed to be connected in a series with the power supply and other components included in the circuit. The pressure transmitter acts as a current source regulating the current at a particular pressure for a range of load impedances as long as there is sufficient supply voltage to power it.

If a load resistor is added to the circuit in series this will cause a voltage drop across the resistor which is directly proportional to the current being generated by the pressure transmitter. The potential of this voltage drop can be easily measured by connecting two voltmeter probes or an analog to digital converter to the circuit on either side of the resistor.

4-20mA current signal related products
  • LMP307 Submersible Level Transmitter
  • LMK387 Cleanable Sewage and Sludge Pressure/Level Sensor
  • KX ATEX Intrinsically Safe SIL2 Approved Pressure Sensor
  • 4-20mA to 0-20mA Signal Conversion

Request info on 4-20ma current signal related products for your application.

The voltage output generated by different values of load resistance on 4 to 20mA current loop are as follows:

Load Resistor (Ω) Min Volts Max Volts
50 0.2 1
100 0.4 2
150 0.6 3
200 0.8 4
250 1.0 5
300 1.2 6
350 1.4 7
400 1.6 8
450 1.8 9
500 2.0 10
550 2.2 11
600 2.4 12
650 2.6 13
700 2.8 14
750 3.0 15
800 3.2 16
850 3.4 17
900 3.6 18
950 3.8 19
1000 4.0 20
Voltage signal related products
  • AS Autosport Pressure Transducer Ratiometric 0.5-4.5 Volts Output Pressure Transducers
  • Analog Output Pressure Gauges
  • Steam Pressure Transducers
  • OEM sensor for diesel tank level measurement

Request info on voltage signal related products for your application.

Primary Sidebar

Pressure Sensor Specifier

Specify a pressure sensor
Select your pressure sensor requirements

Product Selection Guides

  • Differential Pressure Sensors
  • Digital Pressure Gauges
  • Digital Pressure Sensors
  • Digital Readouts
  • Hydrostatic Liquid Level Sensors
  • Millivolt Output Pressure Transducers
  • Pressure Transducers
  • Pressure Transmitters
  • Voltage Output Pressure Transducers

Application Selection Guides

  • Absolute Pressure
  • Dual Temperature and Pressure
  • Flush Diaphragm
  • High Frequency Response
  • Leak Testing
  • Low Pressure Range
  • Oxygen Service
  • Submersible
  • Vacuum

Help Guides

  • Using absolute pressure sensors to measure hydrostatic level
  • Measuring vacuum with negative gauge or absolute ranges
  • Measuring the difference in air pressure between rooms
  • What does negative and positive gauge pressure mean
  • Measuring the Pressure of Hot Media
  • Determining water tank volume using hydrostatic pressure
  • How to get a 10 volt signal from a 4-20mA output pressure sensor

Product Enquiry

Send us your enquiry for a product associated with this Transforming a 2 wire Current Loop into a Voltage Output Signal page, and get assistance with selecting a product for your application.

Email Your Enquiry

enquiries@sensorsone.com

© 2022 SensorsONE Ltd, all rights reserved

  • Home
  • Products
  • Tools
  • Legal
  • Contact