Process Instrumentation | Industrial Processes, Explosive Atmospheres & Hazardous Areas

Process Instrumentation

Process Instrumentation | IECEx & ATEX | Industrial, Hazardous Area & Explosive Atmospheres

Thorne & Derrick International supply instruments, gauges, meters, probes, sensors and transmitters for all process instrumentation applications including liquids, gases and bulk solids – suitable for non-hazardous (“safe”) and hazardous area locations in accordance with ATEX & IECEx classifications for use in potentially explosive atmospheres, Zone 1 and Zone 2 (Gas).


Process Instrumentation 

KROHNE Flowmeters

KROHNE Flowmeters

  • Temperature Measurement
  • Dew Point Measurement
  • Relative Humidity Measurement
  • Carbon Dioxide Measurement
  • Level Control & Measurement
  • Pressure Measurement
  • Flow Metering & Measurement

Process Instrumentation

Thorne & Derrick are Explosive Atmosphere specialists distributing Process & Instrumentation Equipment to the hazardous area industries where ATEX & IECEx certified equipment is required (Class/Division/Zones 1 & Zone 2).

  • ASCO – Solenoid Valves
  • Ashcroft – Pressure Gauges
  • Deeter Electronics Ltd – Level Sensors & Float Switches
  • Fisher – Control Valves (Rotary, Sanitary & Sliding Stem)
  • IFM Electronic – Sensors (Temperature, Flow, Pressure & Level Measurement)
  • Katronic – Ultrasonic Flowmeters & Flow Measurement
  • KROHNE – Hazardous Area Process Instrumentation, Meters & Measurement
  • Micronics – Flow Meters (Ultrasonic Clamp-On Fixed & Portable Meters)
  • Rotronic – Sensors, Probes, Indicators, Transmitters & Measurement Instruments
  • SICK – Temperature, Level, Pressure & Flow Sensors
  • Sika – Temperature Calibrators, Flow Meters, Magnetic Flow Sensors (Magmeters), Flow Switches and Pressure Gauges
  • VEGA – Level, Point Level & Pressure Measurement Sensors, Instruments & Transmitters
T&D, Specialist Distributors Of Process Instrumentation Equipment.

T&D, Specialist Distributors Of Process Instrumentation Equipment.


Know Your Zones

Hazardous Area Zones

Hazardous Area Zones

What is Hazardous Area Zone 1?

  • Zone 1 – a potentially explosive atmosphere in which an explosive liquid or gas atmosphere is likely to occur in normal operation. Although not officially quantified according to IECEx or ATEX but commonly accepted by hazardous area industries as being prevalent for more than 10, but less than 1000 h/yr.

What is Hazardous Area Zone 2?

  • Zone 2 – a potentially explosive atmosphere in which an explosive liquid or gas atmosphere is not likely to occur in normal operation and if it occurs will exist only for a short time. “Short time” is not officially quantified according to IECEx or ATEX but commonly accepted by hazardous area industries as being prevalent for less than 10h/yr.

➡ See hazardous area zones for futher technical information about explosive atsmospheres, explosion proof protection concepts, T-Class ratings and equipment classification according to IECEX ad ATEX.

Contact Thorne & Derrick if in doubt, we can provide expert technical support and specification recommendations for Hazardous Area Process Instrumentation.

➡ For further information about Process Instrumentation please see the product sections below – process instruments are available to measure pressure, temperature, flow or level in both non-hazardous and hazardous area locations.


Explosion Proof & Hazardous Area Electrical Equipment

Hazardous Area Electrical Distributors

Integrity | Knowledge | Reliability | Electrical HVAC Process Instrumentation Equipment

EXPERTS IN EQUIPMENT FOR EXPLOSIVE ATMOSPHERESExplosion Protection Ex d

Thorne & Derrick are leaders in the development and distribution of ATEX & IECEx Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.

Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.

Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to UK and international projects.

Panels | Plugs | IsolatorsEnclosures | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame DetectionProcess InstrumentationProcess Heating | Fans | Security Locking & Access Control

Hazardous Area Electrical Equipment

Competitive Prices | Extensive Stocks | Technical Support | Express Delivery