For the measurement of performance there are various wind tunnels available in which cooler systems with outputs of between a few kilowatts and several hundred kilowatts can be thermodynamically characterised. The range of available media including water/glycol, oil and intake air covers the commonest operating substances for our coolers.Performance measurement in cooling systems with built-in fans is as a rule supplemented by a check on noise emissions. Both acoustic pressure and sound power when operating may be measured.In addition, special studies are often required for which, if necessary, new testing equipment is also specially developed and built.Our portable measurement technology is often also used to record the conditions of use and operating parameters in the field together with the customer. Measurements of temperature and pressure are often supplemented by acoustic measurements and thermographic imaging. In the event of unclear mechanical loads on components in use, from time to time they are also recorded directly with accelerometers or strain gauges in order to derive realistic specifications from them.