Westlock

Compact position monitors combining switches, sensors, wiring terminals, enclosure and local visual indication, offered in stainless steel, aluminium and engineered resin, in explosionproof/flameproof, intrinsically safe, non-incendive, increased safety and weatherproof versions.

Use it whenuse AccuTrak as the standard monitoring-only choice, and let the area classification and the enclosure material pick the specific version - the reason to specify it is the breadth of certifications from general purpose right through to hazardous.

A magnetic switch option rated by Westlock for up to 100 million cycles, with standard LED indication confirming both switch and solenoid performance, and dual certification for intrinsically safe and non-incendive locations. Fitted into Quantum and AccuTrak models.

Use it whenuse MagPAC when you want to carry one switch box that covers both intrinsically safe and non-incendive locations - the dual certification is an inventory decision as much as a technical one - and where high cycle life matters.

A modular 4-20 mA loop current position transmitter combining switch options with HART protocol for continuous valve monitoring.

Use it whenuse it when open and shut is not enough and you want continuous travel feedback plus HART diagnostics, but you do not need partial stroke or shutdown functions.

Control monitors integrating position sensors and low-power solenoid valves in a single unit with pre-wired solenoid pilot valves, options for materials, coil voltages and number of coils, hermetically sealed proximity switches and explosionproof junction housings. Available explosionproof/flameproof, intrinsically safe, non-incendive, increased safety encapsulated and weatherproof.

Use it whenuse Quantum when you want the solenoid and the position feedback to arrive as one pre-wired assembly - the argument is faster commissioning and fewer field connections than mounting a switchbox and a solenoid separately.

Valve monitoring and control with field networking, using embedded I/O to connect field devices to a host PLC or DCS. Dual Hall-effect position sensors, optional low-power solenoid, a network interface module, and cycle count diagnostics. Supports FOUNDATION Fieldbus, Profibus, DeviceNet and AS-Interface.

Use it whenuse Intellis when there are enough automated valves that home-running every one back to the PLC is the dominant installed cost - the networking is what saves the wire, and the cycle counting is what gives you maintenance data you did not have before.

A position and control monitor built specifically for sanitary applications, monitoring and controlling rotary and linear sanitary diaphragm valves, compatible with major sanitary valve makers, with DeviceNet or AS-Interface networking and NEC/CEC non-incendive classification.

Use it whenuse it on sanitary diaphragm valves in pharmaceutical and hygienic processes - this is the version to specify when the valve is a sanitary diaphragm valve rather than an industrial ball or butterfly valve.

An integrated transmitter for complex process applications requiring partial stroke testing or remote emergency shutdown initiation over HART.

Use it whenuse it on shutdown and isolation valves that must be proof-tested without interrupting the process - partial stroke testing on demand from the control room is the reason to move up from a D200.

An intelligent position transmitter with discrete position control, non-contact feedback and HART communication, plus advanced diagnostics covering emergency shutdown, partial stroke testing, solenoid operated valve testing, pulse pressure and full stroke testing.

Use it whenuse it when the valve is safety-critical enough that you want the solenoid tested too, not just the valve - solenoid operated valve testing is the differentiator here, since a stuck solenoid is a common hidden failure on an idle shutdown valve.

Certification and enclosure variants of the three base series, spanning intrinsically safe through explosionproof with aluminium or stainless steel enclosures.

Use it whenpick the variant from the area classification and enclosure material after you have chosen D200, D400 or D500 on function - the base series decides what it does, the variant decides where it can live.

A smart positioner for modulating valve applications using non-contact Hall effect sensing to eliminate linkages, with a spool valve manifold Westlock states was tested for two billion operational cycles, rapid auto-calibration, a standard 4-20 mA positioner transmitter, optional limit switches and HART 7.

Use it whenuse the K20 as the modern default for a modulating control valve where you want HART 7, quick auto-calibration and no mechanical linkage to wear - the very high spool valve cycle rating is the pitch for high-frequency control loops.

A digital positioner with over fifteen years of service across oil and gas, chemical, power and food and beverage, using non-contact sensing, supporting remote mounting, and integrating over HART with FOUNDATION Fieldbus and Profibus PA network capability.

Use it whenuse ICoT when the plant is on FOUNDATION Fieldbus or Profibus PA rather than HART, or when the positioner has to be remote-mounted away from a valve that vibrates or runs hot.