Bray Series 54 Inductive Proximity Sensors for Valves

Non-contact open and closed indication in place of mechanical switches

The Bray Series 54 is a family of inductive proximity sensors that provide position indication for quarter-turn valves. Two independent sensors give open and closed signals, and because the sensing is non-contact there is no mechanical wear and no switch welding, arcing or sparking. The housing is hermetically sealed, maintenance free and resistant to shock, vibration, UV and corrosion, and the sensor mounts directly on VDI/VDE 3845 actuators, which gives a smaller actuator profile than a conventional switch box.

Bray splits the family into general service (extreme low profile, 2-wire or 3-wire), industrial service (compact, with 3-wire PNP, AC/DC or AS-i interface outputs), and hazardous location (intrinsically safe NAMUR or a non-sparking 2-wire design). Choosing a model is therefore a matter of output type, connection style and activator rather than a single part number.

Technical specifications

Source: Bray Series 54 technical sales manual EN_TSM_S54 dated 2025-08-27 and individual technical sheets (TM-1062 to TM-1076). Sensor numbers are Bray part number prefixes; the full order code ends in -71104533.

AS-i, hazardous-area and washdown options

The AS-i versions let up to 62 devices share one two-wire network that powers the sensor and low-power solenoids, cutting junction boxes and cabling, and give solenoid coil health status. A Y-connector and S-connector reduce site cable needs by carrying power and signal for the sensor and the solenoid on a single cable.

For harsh environments Bray offers the non-sparking sensor with a stainless steel impact shield, removable terminal block, captive cover bolts and IP69K rating for high-temperature, high-pressure washdown. The intrinsically safe NAMUR sensors suit classified zones when connected through the right barrier. Activator kits fit Bray Series 92/93 sizes 63 to 210 (imperial) and 63 to 255 (metric) and all Series 98 actuators; kits are listed by part number such as 54063A, 54063B and 54063C in the manual.

Choosing a sensor and what to confirm

Pick the general service sensor for light indoor and outdoor duty, the industrial one where AS-i, AC/DC or a temperature to 100 deg C is needed, and the hazardous-location models for intrinsically safe or non-sparking installations. Please confirm the actuator model and size for the activator kit, supply voltage, output type, connector or cable gland style, and the certificate required for the area.

How the Bray Series 54 works

Each sensor sits near a metal activator on the valve shaft. When the activator moves into range, the sensor changes its output state. Two sensors give the open and the closed signal. Nothing touches, so nothing wears.

Where the Series 54 is used

• Quarter-turn ball valves
• Quarter-turn butterfly valves
• Valve position feedback to a PLC
• Actuated valve packages
• Process plant valve skids

Selection checklist for the Series 54

• General, industrial or hazardous location service
• Output type
• Supply voltage
• Connector style
• Activator type
• Mounting pattern
• Ambient temperature
• Ingress protection

Installation, commissioning and maintenance notes for the Series 54

Mount the sensor bracket on the actuator. Fit the activator on the shaft. Set the sensing gap for the open and closed positions. Wire the sensor output to the controller. Check the signals with the valve cycled.

Requesting a quotation for the Bray Series 54

Please send the output type, the supply voltage and the actuator pattern. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

Series 54 sensor type

It is an inductive proximity sensor.

Series 54 function

It gives open and closed valve indication.

Series 54 sensing

The sensing is non-contact.

Series 54 wear

There is no mechanical wear.

Series 54 switch welding

There is no switch welding, arcing or sparking.

Series 54 housing seal

The housing is hermetically sealed.

Series 54 maintenance

It is maintenance free.

Series 54 profile

It gives a smaller actuator profile than a switch box.

Series 54 general service

General service sensors have an extreme low profile.

Series 54 industrial service

Industrial service sensors are compact with PNP, AC/DC or AS-i outputs.

Series 54 hazardous location

Hazardous location sensors use a NAMUR output or a non-sparking 2-wire design.

Series 54 mounting patterns

The mounting patterns are 30 x 80 mm and 30 x 130 mm.

Series 54 housing material

The housing is PBT thermoplastic or polycarbonate.

Series 54 non-sparking housing

The non-sparking housing is powder-coated aluminum.

Series 54 ingress protection

The ingress rating is IP66/67.

Series 54 general temperature

General service works from minus 25 to 70 degrees C.

Series 54 industrial temperature

Industrial service works from minus 25 to 100 degrees C.

Series 54 non-sparking temperature

The non-sparking type works from minus 40 to 75 degrees C.

Series 54 activators

The activators are non-adjustable, adjustable or high-visibility adjustable.

Series 54 model 540001

The 540001 is a 3-wire PNP sensor for 10-30 V DC.

Series 54 sensing distance

The rated distance of the 540001 is 3 mm.

Series 54 model 540022

The 540022 is a 2-wire general service sensor for 5-30 V DC.

Series 54 model 540004

The 540004 is an AC/DC sensor for 20-253 V AC.

Series 54 model 540005

The 540005 is an AS-i sensor with an output.

Sensor records for the Series 54

Record the model, the sensing gap and the valve tag.

Choosing the right Series 54 output

Choose the output from the controller input you use.

Documents and quotation

The Bray technical sales manual (61 pages, 2025-08-27) is attached as the datasheet. Product page documents also include the Series 54 operation manual and a hazardous-location selection guide.

See the wider range of valve positioners and accessories on our catalogue, or send the model name and order number for a quotation.