Our Unit Converter

The ESI Unit converter allows you to quickly and easily access a conversion tool to work out your preferred unit of pressure measurement wherever you may be. Whether out on-site or in the office.

ESI logo in white

Download the ESI-USB© Software

The ESI-USB© software allows you to connect your ESI transducer to your laptop or PC and be up and running monitoring pressure data within ten minutes. The software auto-updates and is compatible with Windows 8, 10 & 11.


General Purpose Pressure Transmitter with RS-485 Interface

  • Silicon-on-Sapphire sensor technology
  • Pressure ranges to 1,500 bar
  • Excellent corrosion resistance
  • High strength titanium pressure port
  • High resistance to overpressure and pressure transients
  • High accuracy option
  • RS-485 communication up to 1200 m
  • Selectable baud rate
  • Resistant to interference from noise


The GENSPEC GS4400 pressure transmitter is designed to meet the operational requirements of demanding pressure measurement applications where good quality, fast delivery and low cost are of the highest priority.

Providing a half-duplex digital RS-485 output signal and 0-5V analog output, the GS4400 provides high stability and repeatability. It can be configured to suit a multitude of applications and with proprietary RS-485 protocol, each sensor can be allocated a unique device address and connected in series to other sensors and devices on the same communications link.

The unique Silicon-on-Sapphire sensor technology provides outstanding performance and gives excellent stability over a wide temperature range. Standard digital accuracy is 0.15%, with an exceptional overpressure limit. All models are supplied with integral 1/4″BSP male with a range of other process connection options. The titanium alloy wetted parts offer unbeatable corrosion resistance and the M12 electrical connection is rated IP67 for high levels of environmental protection.

Standard pressure ranges:

0 – 1 bar Vac; 0 – 0.5 bar; 0 – 1 bar; 0-2.5 bar; 0-6 bar; 0 – 10 bar; 0-16 bar; 0 – 25 bar; 0 – 100 bar; 0 – 250 bar; 0-400 bar; 0 – 600 bar; 0-1,000 bar; 0 – 1,500 bar (other ranges available)

Typical applications include:

  • Continuous monitoring of hydraulic systems
  • Oil, gas, water and other process liquids,
  • General Industrial environments
  • Medical and and clean room applications
  • Aerospace industries.

Also ideal for the measurement and control of pressure in refrigeration, pneumatic, compressor, HVAC and engine monitoring systems.

Technical Specifications

Electrical Connections

Pin no. Designation
1 RS485 (B)
2 RS485 (A)
3 Common ground
4 DS power IN
5 Analog output
Case Case GND


Get a quote..

For more information or to request a quote contact our sales team