Powell Industries, Inc. - Design, develop, manufacture, sell and service electrical power generation distribution, switchgear and control electrical equipment. Headquartered in Houston, Texas. (Nasdaq: POWL) Krohne GmbH - Manufacturer of a wide range of flow and level measurement instruments for technologies and custody transfer applications. Grabner Instruments - Fully automatic testing equipment for the petrochemistry. Lennart Hojer AB - Manufacture and marketing of fuel additives and instrumentation, such as flow meters. Located in Sweden. CVS-Controls - Control valves, pneumatic actuators, pressure controllers, regulators, chemical injection pumps, centrifuges, and control valve trim. Chandler Engineering - Supplier of instruments for testing oil, gas and geothermal well cements. Features products. Spartek Systems - Provides downhole gauges and surface readout equipment to monitor well temperature and pressure. Includes a catalog of products, downloadable application software, product description flyers and industry links. Oilfield Instrumentation USA - Design, manufacture and servicing of instrumentation, consoles and laboratories for the oil drilling industry. Avanti Elektronik Ltd - Electronic custom designs, quartz transducer simulators, telemetry testers and other specialised test gear for downhole equipment. Located in Scotland, UK. WIKA Instruments - Providing a wide range of temperature and pressure detectors and associated instrumentation. Dynamic Flow Computers - Flow computers for a variety of liquids and gases. Field or panel mounted applications. D-Jax Corporation - Pump-off controls and dynamometers. Based in Midland, Texas. Eztek Ltd - Design, development and manufacture of electronic instrumentation for the oilfield and other hazardous areas. Products, services, and brochure downloads. Located in Scotland, UK Phaze Technologies AS - Design and manufacture of hermetically sealed subsea canisters and electronic instruments. Located in Norway. Innovative Electronics - Design and manufacture of electronic and hydraulic instrumentation for monitoring and controlling drilling rig operations. Anthelion Systems Inc - Manufacturer of industrial instrumentation to monitor torque applied to tubular goods. RMC Internet Division - Online sales of process instrumentation equipment, regulators and parts. Centrpribor - Manufacturer producing instrumentation for control and measurement within the oil and gas industry. Located in Russia. Micro-Smart Inc. - Manufacturer of downhole memory and surface read-out gauges for recording well parameters such as pressure, temperature, flow and depth. Pioneer Petrotech Services Inc - Manufacturer of well test equipment, measuring downhole and surface pressure. Based in Canada. Welbor Technology Inc - Design and manufacture of actuators and electronics for use in downhole and subsea environments. Concept Controls Inc. - Supplier of gas detection, calibration and safety instrumentation products and services. Located in Calgary, Canada. Zencus International - Wellhead and field production wireless data acquisition and transmission instrumentation. Remote web-enabled data visualization software at the desktop. Poor Boy's Instrument - Repair and replacement of drilling instrumentation including weight indicators, recorders and auto drillers. Petrotest Instruments GmbH - Design and manufacture of petroleum test equipment such as flashpoint testers, distillation units and penetrometers. Based in Germany. Sensornet Ltd - Provider of real time fibre-optic monitoring systems to the oil and gas industries. Enables determination of flow in production wells, optimisation of gas lift, monitoring of ESP motors and sand screen integrity. EESITEC Technologies - A company performing research and development into flowmeters for air, gas and liquids using ultrasonic propagation technology. Specializing in prototype development for industrial applications and mass production. Based in Sweden. Eco-Fuel Technologist Pvt Ltd - Design and installer of LPG dispensing stations, bulk LPG storage and distribution systems for industrial applications. Located in India. Dynalco - Manufacturer of electronic instruments and controls for the oil and gas, petrochemical and maritime industries. Condition monitoring and asset management also performed. Rapidlogger - Data monitoring and recording on wellheads, wireline, slickline, coiled tubing and pumping units. Tandy Instruments - Repair, service and calibration of measuring devices including speedometers, rheometers and mud pressure gauges. MacGregor Services, Inc. - Provides sales and service of instrumentation, safety systems, and controls, both new and reconditioned.