| Absolute Process Instruments http://www.api-usa.com/ Manufacturer of plug-in industrial signal conditioners to convert industrial analog signals to the signal or alarm type needed. | |
| Acromag http://www.acromag.com/ Provides industrial I/O solutions for measurement and control applications. Signal conditioning, PC data acquisition, VME boards, 'LonWorks,' and IP modules for analog and digital I/O. Instrumentation products include transmitters, isolators, and alarms. | |
| Acuity Research Laser Sensors http://www.acuitylaser.com/ Develop and manufacture laser distance sensors and laser measurement systems for industrial and OEM use. | |
| Almeg Controls http://www.almegcontrols.com/ Manufacturing controls and probes for level, flow, pressure and temperature. | |
| Althen GmbH http://www.althensensors.com/ German manufacturer of sensors for pressure, force, weight, torque, distance, position, acceleration, inclination and levelling. Product catalogue, tech notes and newsletter. | |
| American Aerospace Controls, Inc. http://www.a-a-c.com/ Manufacturer and provider of AC and DC current, voltage, power and frequency transducers for industrial, laboratory, rail transit, defense and space applications. | |
| Ameritrol Inc. http://ameritrol.com/ Manufactures flow, level and temperature switches for the process control industry. | |
| AMETEK http://www.ametek.com/ A Global manufacture of electric motors and electronic instruments. | |
| AMRA http://www.amra.be/ Portable instruments and transmitters for temperature, pressure and humidity including a line of panel meters and data loggers. | |
| Analytical Technologies, LLC http://www.filmthickness.com/ Specialist process film thickness measurement and control. Applicable for optically transparent thin films to opaque dielectric films. Integrated measurement solutions. | |
| Anderson Instrument Co. http://www.andinst.com/ Designs and manufactures a line of sanitary process instrumentation, for use in the fluid food and beverage, dairy and biopharmaceutical industries. | |
| Anly Electronics Co., Ltd. http://www.anly.com.tw/ Manufacturer of timer, counter, controller, floatless relay, relay, solid state relay and digital temperature controller. | |
| Aqua Measure Instrument Company http://www.aquameasure.com/ Online moisture measurement systems for paper, powders, chemicals, solids processing. Also, portable moisture meters. | |
| Aquasant Messtechnik Ltd http://www.aquasant-mt.com/ Manufacturers automatic interfacial layer control, level, product monitoring, concentration, turbidity, for liquids, powders or foams. | |
| Aquilar Ltd http://www.aquilar.co.uk/ Leak detection solutions for liquids and gases, including flood prevention, for water, oil, fuel, chemicals and detection of toxic, explosive gases and refrigerant gas. | |
| Arjay Engineering Ltd. http://www.arjayeng.com/ Industrial and environmental controls: level, flow, suspended solids, turbidity, oil in water, gas detection, spill alarms, claritek, hydrosense.. | |
| Aseko http://www.aseko.cz/ Manufacturer of gas and vapour detectors, humidity and temperature measurement equipment, and control systems. Site in English and Czech. | |
| Ashe Controls Private Limited http://www.ashecon.com/ Design, development and manufacture of process control instrumentation and automation products. | |
| ASM GmbH http://www.asm-sensor.com/ Manufacturing of sensors and measuring instruments including thermometers and recorderscopes. Headquartered in Germany. | |
| ATEQ http://www.ateq.ca/ Produces leak and flow detectors with local calibration, service and support. | |
