My existing provider (MSI) turned-up 1/2 day late for sceduled calibration last week, costing me at least four MOT slots. This was despite my calling them two days before hand to remind them (they've done this before)

They then sent me an invoice for a replacement exhaust probe: £91.99 +VAT. disposible filter £10.84+VAT.

I've just ordered a replacement probe from Prosol for £49+VAT and a box of 10 filters for £19+VAT. I wouldn't say prosol were cheap...

I have a Bradbury 1141 4gas (Omitec machine and Bradbury headlamp aligner/brake tester, so need a firm capable of carrying out calibration on this type of analyser.

TIA,

Joe