A selection of calibration and reference test instruments suitable for checking temperature and pressure measurements of related instruments plus leak detectors, flame simulators and pressure generators. Temperature instruments include thermocouple simulators, drywell calibrators, non-contact infrared temperature sensors and thermometer for K type thermocouples. An ultrasonic leak detectors can be used to detect ultrasounds generated by gas and liquid leaks or wear detection in bearings with rotating parts. Pressure calibrators are available for both low and high pressure generation using pneumatic and hydraulic pressure generation techniques for testing and calibrating pressure sensors. Test instruments include SharpEye flame simulators and FlameGard test lamps for testing their respective flame detectors.