Our Converter App

The ESI Pressure 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.


Our range of Ex certified pressure transmitters have both ATEX and IECEx approval

ATEX is an EU Directive (94/9/EC) that ensures products are safe to use in explosive environments.

IECEx scheme certifies worldwide conformity to international standards and provides assurance that equipment for use in explosive atmospheres are manufactured and operated according to the highest International Standards of safety.

The most common protection method for process instrumentation is Intrinsic Safety (IS) and this is the protection method used in ESI transmitters. With these instruments the low voltage electronics is designed in such a way that it is incapable of releasing enough energy thermally or electrically to cause an ignition of flammable gases or liquids. To achieve this there are limitations set on levels of voltage, current, capacitance and inductance such that the available energy at a sparking device is below the minimum ignition energy of the potentially explosive atmosphere.

Intrinsic safety equipment must undergo Type Examination by an approved third party. It involves a detailed process of examination, testing and assessment of equipment confirming and demonstrating that the product is safe to use within potentially explosive atmospheres. The certification process must be undertaken by a Notified Body.

Our Ex Certification

ESI has an extensive range of intrinsically safe transmitters, all ATEX and IECEx approved for explosion protection for flammable gases (zone 0), dusts (zone 20) and mining areas (group I M1).

Technical Marking

  • II 1 G Ex ia IIC T4 Ga
  • II 1 D Ex ia IIIC T135°C Da
  • I M 1 Ex ia I Ma

Safety Description

Explosion protection for flammable gases (Zone 0), dusts (Zone 20) and mining areas (Group I M1) is by intrinsic safety alone (“ia”) and the pressure transmitters have the following safety description (note the different Ci value for different models):

Ui = 28V

Ii = 119mA

Pi = 0.65W

Li = 0.1?H

Applying standards


  • EN 60079-0:2012
  • EN 60079-11:2012
  • EN 60079-26:2007 ATEX
  • EN 50303:2000 Mining


  • IEC 60079-0:2011
  • IEC 60079-11: 2011-6
  • IEC 60079-26: 2006