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UK supplier of TopWorx limit switch boxes & valve position monitors

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UK supplier · Discrete valve position sensing

TopWorx Limit Switch Boxes & Valve Position Monitors

Find the exact TopWorx part number you need across the DXP, DXS, DXR, DVR, TXS, TVA, TVF, TVH and TVL families, then request a quotation from our UK team.

Browse TopWorx products Search by part number

  • 1,700+ individual part numbers
  • 10 TopWorx product families
  • Quotation service, no online ordering

Know your TopWorx part number?

Search our catalogue using a full or partial part number to locate the exact product you require. Spaces and hyphens are optional, so DXS ZX1GSEB, dxs-zx1gseb and ZX1GSEB all work.

TopWorx product families

TopWorx valve position monitors are grouped into three series. The D-Series (DXP, DXS, DXR) offers heavy-duty enclosures with worldwide hazardous-area certification options. The TX-Series (TXP, TXS) packs full functionality into compact, direct-mount housings. The TV-Series (TVA, TVF, TVH, TVL) provides light, compact monitors for intrinsically safe, non-incendive and general-purpose duty. The DVR is a compact resin switchbox for confined, non-hazardous installations.

TopWorx DXP switchbox range D-Series TopWorx DXP Rugged aluminium D-Series valve controller with worldwide hazardous-area certification options. 14 part numbers TopWorx DXS switchbox range D-Series TopWorx DXS 316 stainless steel D-Series valve controller for corrosive and hazardous environments. 485 part numbers TopWorx DXR switchbox range D-Series TopWorx DXR Corrosion-resistant composite resin D-Series valve controller. 231 part numbers TopWorx DVR switchbox range D-Series TopWorx DVR Compact engineered-resin switchbox for confined spaces in general-purpose areas. 2 part numbers TopWorx TXP switchbox range TX-Series TopWorx TXP Compact direct-mount TX-Series valve controller in aluminium. Available on request TopWorx TXS switchbox range TX-Series TopWorx TXS Compact direct-mount TX-Series controller for corrosive and washdown duty. 337 part numbers TopWorx TVA switchbox range TV-Series TopWorx TVA Cost-effective composite resin TV-Series monitor for IS, non-incendive and general-purpose duty. 84 part numbers TopWorx TVF switchbox range TV-Series TopWorx TVF Compact TV-Series monitor with an aluminium base and clear resin lid. 239 part numbers TopWorx TVH switchbox range TV-Series TopWorx TVH 316 stainless steel TV-Series monitor for corrosive and washdown duty. 99 part numbers TopWorx TVL switchbox range TV-Series TopWorx TVL Light, compact aluminium TV-Series monitor with up to four sensors. 295 part numbers

Featured part numbers

A selection from each TopWorx family. Every part number has its own page with documentation and a quote form.

Why TopWorx valve position monitors?

A limit switch box, or valve position monitor, mounts on top of an automated valve actuator and tells the control system whether the valve is open or closed. It also gives operators a clear local indication at the valve.

TopWorx, part of Emerson, makes discrete valve controllers in aluminium, 316 stainless steel and engineered or composite resin enclosures. Sensor options include mechanical switches, GO Switch leverless limit switches, proximity and inductive NAMUR sensors, and 4-20 mA position transmitters. Bus options include AS-Interface, FOUNDATION Fieldbus, DeviceNet and PROFIBUS, depending on the family.

The exact sensors, approvals, indicator, shaft, conduit entries and seals are set by each part number. That is why every TopWorx part number has its own page on this site.

Compare the TopWorx ranges →

Choosing a switchbox

  • Enclosure material for the environment
  • Hazardous-area approval, if required
  • Sensor or switch technology
  • Fieldbus or analogue output
  • Mounting to the actuator (ISO/NAMUR)
  • Conduit entries and visual indicator

Industries we supply

Chemical industryChemical ProcessingCorrosion-resistant and hazardous-area options for process valves.Marine industryMarine & OffshoreStainless steel monitors for salt-laden, exposed locations.Switchboxes in the water industryWater & WastewaterReliable feedback for treatment and distribution valves.Food and beverage productionFood & BeverageStainless and compact units for washdown and hygienic plants.

Need help identifying a TopWorx switchbox?

Contact our team with your existing part number, technical requirements or application details and we will help you find the right unit.

Request a quote Contact our team