1. Sensing resistance in air R 0 is measured under controlled ambient conditions, i.e. synthetic air at 23 ?5?C and 50 ? 10% RH. Sampling test. 2. Sensitivity factor is defined as R s in air divided by R s at 1 ppm of NH 3 . Test conditions are 23 ? 5?C and 50 ? 10% RH. Indicative values only. Sampling test. IMPORTANT PRECAUTIONS: Read the following instructions carefully before using the MiCS-5914 described here to avoid erroneous readings and to prevent the device from permanent damage. ? The sensor must be reflow soldered in a neutral atmosphere, without soldering flux vapours. ? The sensor must not be exposed to high concentrations of organic solvents, silicone vapours or cigarette-smoke in order to avoid poisoning the sensitive layer. ? Heater voltage above the specified maximum rating will destroy the sensor due to overheating. ? This sensor is to be placed in a filtered package that protects it against water and dust projections. ? SGX sensortech strongly recommends using ESD protection equipment to handle the sensor.