Tekview envirotxt power loss temperature alerts socket via gsm mobile network tekview envorotext p envirotxt is a new and innovative gsm mobile network device that monitors both temperature and power loss it has a built in temperature sensor which sends sms alerts at pre programmed user defined thresholds from 10 to 50 deg c envirotxt needs a sim card to send sms text message alerts through the mobile network it needs a standard sized sim card on any network except the three netwo