Gas Measurement Instruments (GMI), manufacture a range of portable monitors and fixed gas detection equipment.. We have long term and very close relationships with customers in the oil and gas, petrochemical, shipping, water and sewerage, construction, telecommunications, landfill and brewing industries world-wide. With over 60 years experience in the service of gas detection systems, GMI have industry specialists on hand, committed to providing exceptional customer service and support throughout the UK. Calibration and maintenance need’s can be tailored to specifically meet the most demanding requirements. All systems in the UK are supported by our dedicated Milton Keynes service and calibration division, to provide round the clock repair, calibration and maintenance to our customers. Equipment installed overseas is fully supported around the globe by a network of industry specialist distributors, giving total assurance that your instrument is receiving the most comprehensive maintenance programmes available.