Fibre optic amplifiers are extensively used in industrial automation systems and manufactured by well known brands such as Riko, Omron, Honeywell, Keyence, Takex and Pepperl Fuchs. They are an economical, mass produced product eliminating reliance on specific vendors. One relay is required per PyrOptic loop which may monitor anywhere from one to literally hundreds of connections!
Amplifier relays are very compact, around the same dimensions as a DIN terminal block, in fact most other temperature monitoring solutions in the market have larger field sensors. For really tight applications even smaller relays such as the ultra compact Takex F2R are available.
Alternatively a loop inspection plate (PyrOplate) can be used to facilitate routine checks. This option is suited to applications where a relay is may be impractical, such as motor terminal boxes. The person performing the task applies a light source to one side of the test plate and visually confirms the return path on the other side. In this way, from one to literally hundreds of points can be checked in seconds.
PyrOptic supply quality amplifiers and optical components.