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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 and 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 videos 
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
ProSense digital panel meters are available in 1/32 DIN and 1/8 DIN meter sizes with simple menu-driven pushbutton configuration.
- 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
Power and process monitoring overview
Hour Meters and 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
Hour meters and counters overview
Temperature Sensors and Transmitters
Newest Additions!
- 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!
- Aschcroft 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 sensors and gauges overview
Pressure Gauges and Dial 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
Pressure sensors and gauges overview
Level Sensors and Controllers
Newest Additions!
- Endress+Hauser Soliphant® FTM20 vibration level switches
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
Newest Additions!
- ICON Process Controls Truflo® TKM series paddle wheel flow meters
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
Weight / Force Sensors & Electronics
New!
Load cells convert mechanical force into electrical signals that can be easily measured and displayed and are available in a variety of types to suit different environments and accuracy requirements. Load cells, transmitters and electronics, and mounting accessories deliver reliable performance while solving real-world challenges in weighing applications. Components include:
- Load cells
- Transmitters
- Configuration software
- Controllers and display units
- Equalization junction boxes
- Mounting accessories
Vibration Switches and Transmitters
Vibration sensors help avoid unplanned downtime by providing vibration monitoring of typical industrial machinery for implementing predictive maintenance strategies. ProSense vibration sensors measure the RMS vibration velocity of the device to which it is attached.
- Transmitters offer an analog output for vibration measurement; their IP rating and wide operating temperature range make them ideal for harsh industrial applications
- Switch/transmitter models provide a switch output that operates at a setpoint; an analog output supplies an actual measurement
Signal Conditioners
Newest Additions!
- Define Instruments Twin Link series point-to-point wireless I/O
Signal conditioners convert process, temperature, and other electrical signals into voltage, current, or frequency signals for use with PLCs, loop controllers, encoders, digital displays, or any application requiring an isolated or analog signal.
- DC voltage or current input signal conditioners offer isolation and conversion to/from unipolar to bipolar signals
- Universal input signal conditioners provide isolation and accept RTD, thermocouple, milliamps, volts, or potentiometer inputs
- Temperature transmitters include head mount or DIN rail mount styles with thermocouple or RTD inputs
- Frequency input signal conditioners accept frequency signals up to 100 kHz and provide analog, frequency, or relay outputs
- High-speed optical isolators (encoder input) connect encoders to PLCs, drives, and other devices while addressing electrical noise issues and converting signal types
- Limit alarms accept analog inputs and provide low-limit, high-limit, or other discrete output indications based on the input value
- Point-to-point wireless I/O devices transmit signals over long distances where wiring is impractical or costly
Signal Conditioners Buying Guide
Pneumatic Transducers
Electro-pneumatic transducers (I/P or E/P) are regulators that control air pressure based on an analog input signal. These transducers convert a 4-20 mA current signal (I) or a 0-5/0-10 V voltage signal (E) from a PLC or other controller to a linear pneumatic output pressure (P).
- Current and voltage inputs compatible with PLCs and other controllers
- Several output pressure ranges applicable for industrial pneumatic and process control applications
- Rated for NEMA 4X (IP65) environments
- Regtronic models accept current, voltage, and RS232 serial inputs, and feature an integral digital display that eliminates the need for external pressure gauges
- Select models approved for hazardous locations
Potable Water Pressure Regulators
HydroMode food grade potable water regulators are compact units that provide economical, high-performance pressure regulation of drinkable water.
- NSF electrodeposited chromium plated zinc body
- FDA acetal bonnet, valve seat
- Food grade nitrile/nylon diaphragm, O-ring
- Lead-free brass and food grade nitrile valve plug
Solenoid Process Valves
Solenoid process valves work by energizing an electrical coil that causes a valve body to move from one position to another to allow or halt the flow of fluid. Solenoid process valves are available as singular process valves, stacking or manifold process valves, and media-separated process valves. A variety of valve types and their accessories are available, including:
- High pressure valves
- High performance valves
- Zero differential valves
- Piloted diaphragm valves
- Direct acting valves
Power Monitoring
Power meters are highly accurate devices that measure all the standard power parameters plus metering and harmonics. Meters are available in various mounting styles and operating voltages, and provide the following advantages:
- Reduced costs and production losses
- Improved efficiency
- Easy-to-use solution for industry, infrastructure, and data centers
- Integrated temperature sensor on certain models
- Detects wiring errors
- Select models compliant with ANSI C12.20 and IEC 61557-12
Power and process monitoring overview
Cloud Data Logger with I/O
Using discrete I/O, analog inputs and/or Modbus RTU communication, the STRIDE Pocket Portal connects industrial assets including sensors, meters, and Modbus RTU-capable devices to the cloud for data monitoring and control.
STRIDE® Pocket Portal IoT Bridge offers an end-to-end solution for small-count remote data collection.
- Faster Monitoring: Unmonitored assets can get connected and become monitored assets in minutes with Modbus RTU
- Remote Control: Control Modbus device and up to four digital outputs using mobile app
- Reduce Costs: Enterprises can implement IoT capabilities without needing technical expertise and without modifying equipment
- Retrofit solution: industrial controls, commercial buildings, retail spaces, or factories can be entirely retrofitted with IoT capabilities in days instead of months
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