Steam prepayment metering controller generally needs to be used at a temperature of -30 ～ 60 ℃, then its technical parameters: 1. Adaptable working voltage range: 380V ± 10%; 2. Steam prepaid metering controller adapts to environmental humidity: ≤90% RH; 3. Display range: 0 ～ 99999; 4. The size of the controller of the steam prepayment metering controller: 95mmX115mmX50mm; 5. IC card size: 54mmX85mmX0.8mm; 6. Service life:> 1 million hours. The steam prepaid metering controller is used in accordance with the correct method to extend its service life.