Fibre optic amplifiers are a commercial product manufactured by well known brands such as Omron, Honeywell, Keyence, Takex, Riko and Pepperl Fuchs. 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.
We also supply a loop inspection plate (PyrOplate) for manual periodic checks. This option is suited to applications where a relay may be impractical, such as in motor terminal boxes. The person performing the task applies any visible light source to one side of the test plate and 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.