+31 (0) 33-2300039 contact@degrootinstruments.nl

FITOK Valves and Fittings

Fitok is manufacturing compression type tube fittings, instrumentation valves, sample systems, high pressure equipment, semiconductor equipment and gas valves since 1998 They have facilities in Germany, China and the USA.

CLASSIC filters

Extended line of Gas- Liquid- and Coalescing filter housings in Stainless Steel, Aluminum, PTFE and Plastic housings for disposable bonded microfibre filter elements manufactured from precise mixtures of borosilicate glass microfibres to the very highest standards of quality control, using different binder types. They also manufacture elements 5 layer sintered SS filter and SS single layer woven Mesh Elements, PTFE Filter Elements, PE filter Elements and absorber products.


Special on application made filter houses and filter solutions.


E.I.F. Filtres has developed a new 3 D solution based on the NeSSI platform (New Sampling/Sensor Initiative). The ASTUTE system permits the analyzer, along with the sample conditioning system and sensors, to be mounted directly on the fast loop of the sample system, nearest to the process.


Since 1973, Shelco has used state-of-the-art research and development to design high-quality filters that increase performance and reduce costs. Our proven single shell design has become an industry standard – and today, our entire product line offers innovative solutions for each customer. Shelco’s complete range of industrial filter cartridges offer high performance, cost-effective solutions for every filtration challenge. When absolute retention and high purity are essential, MicroVantage is the obvious choice. Shelco Filter’s housings are ASME Code certified. This new certification allows for worldwide distribution and follows globally accepted engineering standards.


Gas detection systems with universal transmitters with automatic sensor recognition and configuration.


Senko Co. Ltd had developed sensors of the carbon monoxide, hydrogen sulfide by our own technology, starting the oxygen sensor. They develop the more efficient, convenient products for the customers, using new technology as well as conventional gas safety equipment. Including the sensors and the battery life.

Pressure Tech

Extensive range of high quality stainless steel pressure regulators for use on gas and liquid applications. Our ability to work closely with our customers and listen to their specific needs, has helped ensure we design products that provide accurate control to their systems, with long term reliability in service. Pressure Tech regulators are manufactured within the UK and covered by ISO-9001 accreditation.


UHP & Industrial Pressure Reducing Regulators for corrosive liquid & gas control. Panel and gas bottle regulators.


Line of pneumatic valves, solenoid valves, manual valves, air cylinders, check valves, spray guns, fittings etc.
from PTFE, PFA, PVDF, PEEK, Polypropylene, PVC and other specialized polymers.

King Instrument Company

Choosing to partner with King Instrument Company means that you’re backed by over 28 years of flow meter and flow control industry experience.
High quality Rotameters. King Rotameters provide flow measurement assurance.


Pressure gauges, chemical seals (Diaphragm seals), thermometers, limit switch contact assemblies for pressure gauges and thermometers, pressure transmitters, dead weight testers since 1903. Beside the production of our quality standard products according to DIN/EN we also consult our customers in all matters concerning pressure and temperature. We develop numerous custom-made products especially for our customers!

Winters Instruments

Comprehensive product lines of pressure gauges, thermometers, diaphragm seals, transmitters, switches and accessories.


Founded in 1981, Malema designs and manufactures measurement and control instruments for abrasive slurries, surfactants and high purity and corrosive chemicals.
Experienced in sensors, electronics, and process instrumentation, Malema’s products are based on proven designs and are manufactured to meet the highest quality standards in the semiconductor, medical, laser, biotechnology, water treatment, chemical, and petrochemical industries.

DEKORON Unitherm

Traced and / or insulated instrument impulse Lines and sample Lines bundles.


ATEX heated lines, ATEX drum heaters and ATEX heating jackets as well as ATEX temperature controllers for different applications. Winkler ATEX heated lines are found in systems and plants to monitor air pollutants in power stations and incineration plants and for process analytics in industrial plants. The explosion protected heating jackets and drum heaters are suitable for heating containers with viscous or crystalline content. In order to ensure optimal and smooth use of our ATEX heated lines and ATEX heating jackets, we have specially matched the Winkler ATEX temperature controllers to explosion hazard areas. All our ATEX products are suitable for Zones 1/2 (gas) and 21/22 (dust). All our ATEX products are approved as complete systems and certified with a single EC Prototype Test Certificate (system approval)

SMB Gesellschaft für Automatisierungs – Technik GmbH

Special air headers, pressure vessels and autaclaves.

BULK s.r.l. instrument bulk material

Designs and manufactures compression type double ferrule fittings, needle valves and 2,3,4,5 way manifolds, GRP instrument enclosures, sunshades and flexible soft instrument enclosures.

Almatec AG

Almatec AG is a leading resource for customized, innovative and intelligent enclosure systems in light metal and GPR technology for telecommunications, transport engineering, energy and industry.
We create for our customers a measurable added value with the lowest costs over the entire life cycle of the product.