- ReiTech Instrumentation manufacture thermometers, thermometer probes, probes, antibacterial wipes and provide a calibration service for thermometers. Their thermometers are used for haccp, food safety, food hygiene, or general temperature measurement. Contact thermometerrs and infra red non-contact thermometers to meet your haccp, iso9000 or qmark quality systems.www.reitechltd.com