Crowcon Clip is a portable gas detector – a robust, easily transportable gas monitor specifically designed for detecting hydrogen sulphide (H2S), carbon monoxide (CO) or oxygen (O2) gases.
The Crowcon Clip is maintenance free, reliable and provides durable fixed life monitoring in a compact and maintenance-free package.
Easy to maintain, the Crowcon Clip portable gas detector has changeable alarm levels to ensure compliance with changing regulations or ever-changing company procedure.
C-Test bump solution with configuration update keeps the Crowcon gas detectors correctly configured to ensure the monitor is consistently up-to-date without the need for a service or technician team.
Contact T&D for price and delivery on Crowcon Clip gas detectors.
The Crowcon Clip is portable and lightweight and has a single button operation making the gas detector very user friendly and easy to use in hazardous areas and confined spaces. The portable gas monitor is extremely efficient working within a wide temperature range and is effective in many harsh environments.
The Crowcon Clip gas detector is also water and dust resistant to IP66 and IP67.
Portable gas detection equipment provides lightweight, constant protection against hazardous gases and vapours for any personnel carrying or wearing the Crowcon Clip detector. The lightweight nature of the detector makes it suitable for clipping onto clothing near the users breathing area to provide instant detection and notification of gas.
Gas detection in confined spaces
Gas detection for working in confined spaces such as underground manholes
Hazardous area industries including offshore oil/gas platforms and FPSOs, onshore oil refineries, processing plants, pipelines, storage farms and LPG/LNG plants all utilise or produce a wide range of hazardous flammable liquids and gases that can be detected using correctly specified flame and gas detectors.
Detecting toxic and flammable gases requires the detectors to be classified and certified according to the specific IECEx or ATEX standard – we distribute flame and fire detectors manufactured by Spectrex to operate in the harshest environmental conditions including self-contained stand-alone devices designed for direct connection to control and alarm systems or automatic fire extinguishing systems.
Our range of Hazardous Area Fire & Gas Detection System products also includes Explosion Proof Warning Systems & Hazardous Area Lighting – comprehensive range of intrinsically safe, flameproof and explosion proof alarm sounders, sirens, bells and horns, loudspeakers and beacons.
♦ LV Power Products | Junction Boxes & Enclosures ATEX | Plugs ATEX | Control Stations ATEX | Isolators ATEX
Thorne & Derrick | Detecting Flame | Heat | Gas
Follow our Showcase Page on LinkedIn to receive hazardous area product innovations, industry news, whitepapers, videos, technical tips and training webinars for professionals involved in the explosive atmosphere industries.
High Current | High Temperature | Explosion Proof | Multicontact Connectors
uploaded by Chris Dodds | Thorne & Derrick Sales Marketing Manager
Inertia and a resistance to change prevents progress even where the allure or reason for the initial attraction has long since past.
Working with Marechal, a world-leading manufacturer of industrial plug-socket assemblies, Thorne & Derrick can provide increased safety and improved reliability compared to the traditional “hard-wiring” approach to low voltage power distribution.
Marechal Decontactors can be disconnected under full electrical load for planned maintenance or rapid change out of equipment during plant shutdowns and turnarounds.
Marechal plugs feature a safety button placed on the upper section of the safety socket enabling the user with a single press of the button to disconnect the equipment up to 250A – no specialist skills or training is required to install the plugs.
Marechal plug-socket assemblies can be removed in complete safety – the power outlet installation is safe and does not represent an electrical hazard guaranteeing operating speed and time savings during installation operations or machine shutdown.
As an additional feature a safety shutter protects the user according to IP4X/IPXXD – the live contacts are inaccessible behind the closed shutter.
The Marechal decontactor is a plug and socket with an integral load-break switch – this unique design offers various benefits :
Marechal | The Decontactor
Out With The Old, In With The New. Contact T&D to arrange a UK site demonstration or survey of your power distribution requirement. No obligation. No cost.
We think we can meet any power challenge.
Automatic IP66/IP67 dust and liquid tightness – check. Hazardous area Zone 1 and Zone 2 – yes, compliant with ATEX and IECEx. Signal and control options – yes, up to 37 contacts. High current capability – got it covered, connect up to 700amps. Handle heat – we can cope, withstand 400°C.
See our series of industry sector Blogs below.
 Read More – FOOD & BEVERAGE
Read More –Â PROCESS & HAZARDOUS AREA
Read More –Â MINES & QUARRIES
Read More –Â OIL & GAS
Read More –Â TUNNELS (ROAD & RAIL)
Read More –Â CONSTRUCTION
 Read More – WATER
Read More –Â HEAVY INDUSTRY
Thorne & Derrick are leaders in the development and distribution of 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.
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access ControlÂ
You can Follow our Showcase Page on LinkedIn to receive updates about more hazardous area product innovations, industry news, whitepapers, videos, technical tips and training webinars for professionals involved in the explosive atmosphere industries.
Experts In Equipment for Explosive Atmospheres | Leaders in ATEX Innovation
ASCO Valves
ASCO Valves
By Chris Dodds | Estimated reading time: 5 minutes
ASCO solenoid valves provide fluid control solutions for a wide range of industrial applications. Selected models are available with hazardous-area certifications, including ATEX and other market-specific approvals.
Choosing the right valve for a potentially explosive atmosphere requires you to check the certification, equipment marking and suitability for the intended application. Explore our range of ATEX-certified solenoid valves for hazardous areas to find out more.
Hazardous Area Classifications
Below, we answer common questions about ASCO Numatics ATEX solenoid valves, including accessories, assembly, traceability and maintenance.
Yes, but you must check that the accessories are suitable for the valve and its intended hazardous-area application. ASCO Numatics assesses the risks associated with compatible accessories. If you want to use an accessory outside the manufacturer’s approved combinations, assess its suitability on a case-by-case basis.
You can assemble ATEX-certified components, such as a pneumatic valve with a CNOMO interface solenoid valve, or a cylinder with an electro-pneumatic valve. However, you must check the suitability of the complete assembly before installing it in a hazardous area.
Consider the following points:
ASCO ATEX Valves – Contact Thorne & Derrick for Advice
Manufacturers maintain product information to support traceability throughout the equipment lifecycle. The original ASCO Numatics information identifies records such as customer details, product codes, serial numbers, manufacturing dates and order numbers.
Keep the valve’s identification and supporting documentation available so you can confirm its specification and service history when required. For product-specific traceability requirements, consult the manufacturer’s current documentation.
Before replacing a valve on an existing installation, check its certification, condition and suitability for the hazardous-area classification. Review the equipment documentation and the installation’s risk assessment to determine whether the valve remains suitable.
If the existing valve does not meet the requirements for the application, select a suitable replacement with the correct certification and protection level. Explore ATEX solenoid valve options or contact Thorne & Derrick for help identifying suitable equipment.
You may be able to maintain or repair an ATEX-certified valve using the manufacturer’s approved spare parts and procedures. Always follow the instructions for the specific model and ensure the work does not compromise its certified protection.
Before carrying out repairs, check that:
Do not return equipment to service until a competent person has confirmed that it remains suitable for its intended hazardous-area application.
ASCO manufactures fluid-control equipment for industrial applications, including solenoid valves designed for use in specified hazardous areas. The suitability of each valve depends on its exact model, certification, marking and operating conditions.
ATEX Solenoid Valves
When selecting an ATEX solenoid valve, check the requirements of the installation and confirm that the certification covers the equipment supplied. For electrically operated valves, this includes checking the solenoid coil and valve assembly against the manufacturer’s documentation.
Some electro-pneumatic configurations use a separate CNOMO solenoid pilot. In these cases, check the documentation and certification requirements for both the solenoid operator and the pneumatic valve.
ASCO Hazardous-Area Solenoid Valves
Other equipment installed in a zoned hazardous area may also need to meet applicable requirements. Always assess each component according to its construction, intended use and the conditions in the hazardous area.
Thorne & Derrick can help you identify hazardous-area solenoid valves for your fluid-control application.
Thorne & Derrick can help source ASCO solenoid valves for industrial fluid-control applications. Availability and delivery times depend on the model and current stock position.
Ask Thorne & Derrick About ASCO Valve Availability and Delivery
Watch the video below to learn more about ASCO valve solutions.
Thorne & Derrick supplies electrical and process instrumentation equipment for potentially explosive atmospheres. We support onshore and offshore oil and gas, petrochemical and process industries, as well as infrastructure and maintenance projects.
Our team can help you identify suitable equipment for new installations, maintenance requirements and planned replacement of legacy products. Always confirm the equipment’s certification and suitability against the hazardous-area classification and the manufacturer’s documentation.
Explore related product categories:
Explore process instrumentation:
Join the Process & Hazardous Area Industries LinkedIn group to connect with professionals working across heat tracing, gas detection, fluid control and flow measurement.
Hazardous Area Heating Specialists For Paint Spray Booths (Zone 1 Zone 2 ATEX Certified)
Ad: Portable Heaters For Hazardous Areas
For further info about hazardous area heaters for Paint Spray Booths click the links below.
Also: Plugs & Sockets | Lighting | Junction Boxes & Electrical Enclosures
Thorne & Derrick International distribute an extensive range of electrical heaters to provide paint spray booth heating:
The heat trace cable ranges stocked and supplied by Thorne & Derrick International includes electric heating cables for process temperature maintenance, pipe and vessel freeze protection and roof and gutter de-icing applications where snow and ice removal is required – cables and systems are available for commercial, industrial safe area (non-hazardous area) and hazardous area heating applications with ATEX certification.
Electric heat tracing is a cable based system used to maintain, raise temperature and protect process pipework and vessels against freezing temperatures and associated frost damage – heat tracing cables mitigate and counteract cold weather effects as part of a Winterization strategy for industrial and process applications against low (sub-zero) ambient temperatures on both onshore and offshore locations.
Heat tracing systems utilising self-regulating, constant wattage and mineral insulated (MI) heating cables are available to provide the optimum electrical heating system for your application – we provide a trace heating system design service.
Heat Trace Cables: Ramp Heating | Roof & Gutter Heating | Water Pipework Frost Protection | Hopper Heating | Tank Heating | Hazardous Area Heating | Fire Escapes
Trace Heating & Heat Tracing Cable Systems Specialists | Thorne & Derrick
VEGA – World Leading Manufacturers Of Level & Pressure Sensors
VEGAFLEX81 level sensor provides a temperature operating range of -60 to 200°C and up to 75 metres measuring distance.
A large butchery requires the measurement of the level of ammonia in the storage room of its meat-packing facility. Level monitoring is required in the low-pressure receiving tank in the system.
The upper part of the tank contains ammonia vapour which is transformed into liquid form in the compressor before being pumped back into the tank.
When pumped back into the lower part of the tank the liquid ammonia passes through the cold storage room where it heats up and becomes ammonia vapour again. It rises to the top part of the tank and the cooling cycle begins again.
Monitoring the level of the liquid ammonia is particularly important for the operation of the system because if the liquid phase in the vessel gets too high, liquid ammonia would be sucked into the compressor, thereby causing serious damage.
The biggest challenges in this application arise from the special properties of ammonia, its relatively low dielectric constant and the process temperature of -30° C. In a gaseous state, ammonia can diffuse through standard industrial seals and destroy the electronics in the instrument housing within a very short time.
The VEGAFLEX 81 level sensor is used to measure the ammonia effectively.
VEGA VEGAFLEX 81 is an intrinsically safe sensor which can be equipped with a borosilicate glass feedthrough (second line of defense) for ammonia applications. This feedthrough is gas tight and resistant to ammonia vapour.
The temperature range of the sensor, -60 … +150° C, matches the requirements perfectly. The coaxial measuring probe protects the borosilicate glass feedthrough and is ideal for liquids with a low dielectric constant.
The VEGAFLEX 81 guided radar level sensor can be used for all liquids including bitumen and liquefied gas. It can be used for storage containers, standpipes, in a metering tank or in tank farms. The VEGAFLEX 81 measures the level or interface (separation layers) of liquids with great reliability and accuracy.
VEGA Level Sensor – VEGAFLEX 81 Guided Wave Radar Level Sensor
VEGA VEGAFLEX 81 guided wave radar level transmitter is available in hazardous area options to meet ATEX & IECEx directives.
Approval C: ATEX II 1G, 1/2G, 2G Ex ia IIC T6
Approval D: ATEX II 1G, 1/2G, 2G Ex d ia IIC T6
Approval E: ATEX II 1G, 1/2G, 2G Ex d IIC T6
Approval R: ATEX II 1D, 1/2D, 2D, IP6x T
Approval C: IECEx ia IIC T6
Approval D: IECEx d ia IIC T6
Approval E: IECEx d IIC T6
Approval R: IEC IP6x T tD
For more information click:Â VEGA Guided Wave Radar Level Measurement
Guided Wave Radar Level Measurement Using VEGA VEGAFLEX Sensors
Radar Level Measurement Using VEGA VEGAPULS Sensors
Thorne & Derrick International, based in the UK, distribute Explosion Proof & Hazardous Area Process Instrumentation Equipment (ATEX & IECEx Certified): this includes industrial measurement probes, humidity sensors, data loggers, handheld instruments and transmitters for temperature measurement and monitoring of relative humidity. Additionally, hazardous area instrumentation is also available for monitoring carbon dioxide, differential and process pressure, flow, dew point, water activity and analog signals.
Thorne & Derrick are inviting you to join LinkedIn’s fastest growing Discussion Group – Process & Hazardous Area Industries : Heat Tracing, Gas Detection, Fluid Control & Flow Measurement. News, projects, videos, promotions, whitepapers, jobs, webinars, press plus much more. 
ABOUT US
Thorne & Derrick International are your single-source supplier of Electrical, Mechanical, Process & Instrumentation Equipment. T&D provide an outstanding service to UK and international customers – we are highly customer responsive and absolutely committed to providing a world-class service.
T&D supply utilities, power, renewable energy, construction, rail, manufacturing, food/beverage, mining, oil, gas and petrochemical industries – distributing 100,000+ products from 100+ manufacturers from multi-million pound stocks. Since 1985 we have established a solid reputation based on service, integrity and trust.
Published 13 Mar 2020
Press release date: 2 April 2020 | Originally uploaded by Chris Dodds, T&D Sales & Marketing Manager Dynaco ATEX Doors: Certified High-Speed Doors for Hazardous Areas Thorne & Derrick International announced an exclusive UK distribution agreement with Dynaco in...
Published 04 Jul 2019
Press Release Date: 04.07.2019 uploaded by Chris Dodds (T&D Sales + Marketing Manager) Category: Stockist Distributor Agreement Announcement Thorne & Derrick International announce that they have signed a Preferred Distributor Agreement with Raytec, the world leading manufacturer of LED...
