Sauermann is the German company specializing in making pumps for air conditioning, heating and refrigeration application. The manufacturer is a very well known brand in US, due to the product quality and endurance. Sauermann now supplies a broad line of dataloggers for HVAC/R technicians and engineers. The data loggers are designed to accurately measure and monitor temperature, humidity, pressure, CO2 and other environmental IAQ factors. The Sauermann data loggers are very accurate and priced to provide great value and utility.