measure, monitor, control

Rayleigh Instruments Limited


Rayleigh Instruments Limited was established in 1964. The business of the company is to supply to industry a wide range of control, instrumentation and relay products.

Our Range of Products

Our product portfolio comprises distributed goods and in-house manufactured products. We are also the exclusive UK distributor for a number of prominent manufacturers in Germany, Italy, India, China and the United States.

Our product range includes:-

Electrical Instrumentation and Control

  • Analogue, digital and bargraph instruments
  • Electrical transducers, voltage and current transformers
  • Kilowatt hour meters
  • Multi-function power monitors
  • Earth leakage relays
  • Measuring relays: current, voltage powerfactor, load, frequency, speed
  • Timing relays
  • Easywire metering system
  • Rayleighconnect remote monitoring and control software

Safety Products

  • Safety relays: emergency stop, two handed, protective gate, safety timers
  • Light curtains
  • Coded, magnetic, safety interlock switches

Rotational Measurement and Control

  • Shaft encoders: incremental, absolute and linear
  • Proximity sensors: inductive, capacitive, optical, magnetic and ultrasonic
  • DC Tachogenerators
  • Tachometer – analogue and digital
  • Speed Controllers
  • Motorised potentiometer and gearboxes

Temperature and Pressure Products

  • Thermostat – mechanical and electronic
  • Temperature transmitters and indicators
  • Pressure transmitters and transducers
  • Differential pressure transmitters
  • Pressure switches: pressure indicators
  • Ex-proof – temperature and pressure products

In-House Manufacture

The Company markets products manufactured in-house by the Raytel Group. The range includes:

  • Multi stage electronic thermostats (railways)
  • Passenger operated pushbuttons (railways)
  • Door control interface system (railways)
  • Electronic control system and products (railways)
  • Ex-proof electronic thermostats
  • Electronic control system and products

Client Services

An expanding area of our business activity is the provision of special control/instrumentation equipment to client specification. We are well positioned to do this by virtue of our many years of experience in the general control and instrumentation field coupled to the electronic design expertise of the Development, Design and Manufacturing Department of the Raytel Group. A particular area of specification is the Railway Industry where we have business links going back many years. The considerable experience gained from this and other areas of work enable us to offer the following services:

  • The development of a “niche” product for which the clients sees a personal need/wider market potential.
  • The development of a product or control arrangements to modernise an existing control process.
  • The development of a product which the client needs but finds difficult or expensive to procure.


Quality Policy

To see the statement of our Aims – Vision, Mission and Values Click Here

Links and Affiliations

To see a comprehensive list of our Links and Affiliations please Click Here

Quality Management System – ISO 9001:2015

Rayleigh Instruments Limited
BSI Certificate of Registration No. FS 12165
Visit Site / View Certificate

* Excluding clause 7.5.2. There are no processes that need validating because all processes are measurable

Raytel Production
Design, development and manufacture of electronic-based products.


Company Registration No. 808961
Vat No. GB 394 960 700

For more information on the products and services offered by Rayleigh Instruments, you can visit our website at

the first choice supplier of control, instrumentation and relay products


Raytel House, Cutlers Road, South Woodham Ferrers, Chelmsford, Essex CM3 5WA. UK
+44 (0) 1245 428500
Mon - Fri 8:30AM - 5:30PM


Rayleigh Instruments Sp. z o.o. ul. Aleje Jerozolimskie 214, 02-486 Warszawa, Poland
+48 22 290 27 76
Mon - Fri 10AM - 6PM

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