Smart Buildings MANHOLE SENSOR V3.0-LR demo_14 ₦13.90 NETOP Manhole sensor is a long range wireless sensor which can be used for Manhole opened/closed application that provide manhole cover’s status information. This sensor is compatible with LoRaWAN technology. The standard version of this sensor is powered by one replaceable 3.6 V AA sized battery (included with purchase). View