Home › Articles & Blog › Comprehensive Guide to Smart Water, Electricity & Gas Meters Smart Metering Comprehensive Guide to Smart Water, Electricity & Gas Meters A guide to the types of smart meters and how to choose the best option for residential and commercial complexes — from ultrasonic water meters to miniature electricity submeters. Types of Smart Meters Choosing the right meter is one of the most important decisions in utility submetering projects. This guide introduces the types of meters used in residential complexes. Smart Water Meter Ultrasonic water meters operate with no moving parts and offer very high accuracy. These meters can measure both cold and hot water consumption. Miniature Electricity Submeter Single-phase and three-phase DIN-rail miniature electricity submeters take up minimal space and support Modbus communication for data logging. Energy Meter (BTU Meter) For buildings with a central boiler room, the BTU meter precisely measures each unit's share of heating consumption.