I have one of these on my hot water cylinder and it has lost its calibration.
It is a discontinued product and has been replaced by model PTT2, which requires a live feed to run it, to which I don't have easy access in my airing cupboard.
Does anyone know from where I can still get a PTT1, or can anyone recommend a direct replacement from another manufacturer? The Honeywell L641A1039 has attracted my attention and I'm currently asking Honeywell if it would be suitable.
It is a discontinued product and has been replaced by model PTT2, which requires a live feed to run it, to which I don't have easy access in my airing cupboard.
Does anyone know from where I can still get a PTT1, or can anyone recommend a direct replacement from another manufacturer? The Honeywell L641A1039 has attracted my attention and I'm currently asking Honeywell if it would be suitable.