T20 GSM GPRS Remote Temperature and Humidity Controller

T20 GSM GPRS Remote Temperature and Humidity Controller Skype: glare.wang WhatsApp: 0086-13420971345 The temperature and humidity of refrigerator & freezers used for storage of critical goods such as, cold room, warehouse, medicine, vaccine etc. need to be continuously monitored and recorded. If the temperature goes above or below the permitted temperature levels, the operating personnel need to be alerted as well so that the items can be well protected. Our systems for