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Continuously changing variable data and control methods are often required in process control. Process variables such as pressure, flow, level, and temperature are sensed, transmitted, and converted for continuous or batch processing by a wide variety of instrumentation.
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Process Control & Measurement
Process control and measurement devices monitor variables such as pressure, flow, level, and temperature, providing signals to represent changing values or discrete (ON/OFF) outputs to indicate conditions such as limit thresholds or alarms. These signals enable monitoring and control, triggering actions in valves, actuators, or other devices to maintain optimal process conditions.
- Pressure sensing devices measure pressure at a specific point in a process and may be used for monitoring or paired with a control device to perform functions such as opening or closing a valve to regulate pressure.
- Flow sensing devices measure the flow rate (volume per unit of time) and/or consumption (total flow) of liquid traveling through a system.
- Level sensors monitor the level of liquids, pellets, powders, and other similar products in tanks and process systems.
- Temperature switches integrate sensing and a setpoint-tripped output; transmitters receive the measured variable from a sensor (or have an integral sensor) and convert it to an output more typically compatible with industrial monitoring or control devices; controllers combine sensing and control of the variable in one unit.
- Vibration detection devices are used to monitor, analyze, and identify vibrations of industrial equipment, which may indicate a malfunction, pending failure, or process restriction.
- Weight / force sensors, like load cells, provide reliable measurement of compression, bending, and tension forces and are vital for weighing applications.
- Other devices used for process control systems include displays for monitoring process values, signal conditioners, and process valves.
Process control and instrumentation overview
Process control videos For part listing and specifications, go to Shop Now
Temperature / Process Controllers
Process controllers take a signal from a temperature device, such as a thermocouple, RTD, or a pressure/flow/level sensor, and maintain a setpoint using a relay, voltage pulse, current, or linear voltage output (depending on model). Various controllers are available that support modes such as PID, ON/OFF, Ramp/Soak and Manual.
- Basic and standard temperature controllers offer single-loop control of heating or cooling processes
- Modular temperature controllers offer the same functionality as single-loop controllers but can be expanded with multiple modules to create a low-cost multi-loop temperature control system
- Advanced process controllers accept analog and thermocouple signals for ON/Off or PID control of temperature, pressure, level or other applications
- Accessories include mounting hardware, cables, and software
Digital Panel Meters
Newest Additions!
- ProSense LPD5-A series large process meters
Digital panel meters precisely display process measurements on bright LED screens, and support various input types, alarms, and analog / discrete output options. They are ideal for real-time monitoring, automation, and control in industrial environments.
- Panel meters accept a wide variety of input signals for process, temperature, load cell, and other applications
- Output options include alarm relays, analog signal retransmission, and sensor excitation voltage
Graphical Panel Meters
Graphical panel meters combine the instant visual representation of an analog meter with the accuracy of a digital meter. This style of panel meter features a curved bar that provides an instant visual display, plus a digital readout for reading accuracy.
- Standard graphical panel meters measure voltage, current, frequency, or temperature process variables, or directly monitor high voltage or current sources
- Advanced panel meters feature a large 4-inch display, Modbus communication, accept inputs such as voltage, current and frequency, and are ideal for a variety of industrial applications
Analog Panel Meters
New!
Analog panel meters visually display electrical measurements, such as voltage, current, or frequency, using a moving pointer over a printed scale. They provide real-time, easy-to-read indications of the measured value, and the moving needle is helpful for quickly observing trends or fluctuations.
Hour Meters & Counters
Trumeter hour meters and counters provide reliable counting and run hours tracking metered from processes, equipment, or machinery. These units are available in a variety of input voltage ranges and mounting options.
- Battery powered LCD hour meters
- Electromechanical hour meters
- Battery powered LCD counters
- Electromechanical counters
- Gaskets and accessories
Temperature Sensors & Transmitters
Newest Additions!
- ProSense XTD2/XTH2 series fixed-range temperature transmitters
- WAGO JUMPFLEX® 857 series high density temperature transmitters
- Endress+Hauser iTHERM and iTEMP series temperature transmitters
Temperature switches, sensors, and transmitters provide accurate temperature monitoring and control.
- Temperature switches
- Digital temperature switches and transmitters
- Thermocouple, RTD, and thermistor probes and sensors
- Temperature transmitters with or without integral sensor
- IO-Link and HART compatible transmitters available
- Infrared pyrometers
- Thermowells and fittings
- Thermocouple wire and RTD extension wire
Pressure Sensors
Newest Additions!
- MP Sensor P.Touch series pressure transmitters
- Ashcroft B-Series mechanical pressure switches
Pressure switches and sensors measure system pressure for monitoring and control in a wide range of compatible liquid and gas applications. Offerings include:
- Electronic and mechanical pressure switches for simple pressure detection
- Compact pressure and vacuum transmitters
- Digital pressure switches / transmitters with LCD display
- Pressure transmitters with ceramic or stainless steel sensing element
- Hygienic models and models for potable water applications
- DIN-rail or process mounted differential pressure transmitters
- Accessories including siphons, snubbers, and isolation needle valves
Pressure Gauges & Thermometers
Gauges with digital or dial displays offer simple variable measurement and readout for industrial applications.
- Mechanical dial pressure gauges are available in a variety of configurations for displaying pressure readings in most pneumatic, hydraulic, HVAC, plumbing, industrial and commercial applications
- Digital pressure gauges are ideal for industrial and general purpose applications requiring an accurate and reliable device with easy-to-read digital display
- General purpose dial thermometers have bi-metallic sensing elements for reliable readings
Level Sensors & Controllers
Newest Additions!
- ProSense SBLT series small bore submersible level sensors
Level sensors monitor the level of liquids, pellets, powders, and other similar products in tanks and process systems.
- Float level switches
- Ultrasonic level sensors
- Pulsed, guided wave, and frequency modulated continuous wave (FMCW) radar level sensors
- Vibration fork and rod level switches
- Capacitance level switches
- Rotating paddle level switches
- Submersible level sensors
- Differential pressure level transmitters
- Level controllers
- Level sensor accessories
Flow Sensors
Flow sensors accurately measure the flow rate of a fluid, such as a gas or liquid, in a pipe or conduit and provide reliable feedback for monitoring and control in industrial processes.
- Mechatronic sensors use a spring supported piston to monitor the flow of liquid media
- Magnetic-inductive flow meters reliably detect the flow rate of conductive media up to 198 gallons per minute
- Thermal flow sensors, with no moving parts, are a reliable alternative to mechanical flow switches
- Vortex flow sensors offer a very cost-effective solution optimized for monitoring water and deionized water flow
- Paddle wheel flow meters count the rotations of a wheel turned by the fluid flow
- Differential pressure flow transmitters accurately measure the pressure drop across a restriction in the flow stream
- Variable area mechanical flow meters provide visual indication of flow rate for water or petroleum based fluids
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