If you want to measure the consumption of the whole house or one device such as an electric boiler or a heat pump, the Sinotimer watmeter will come to the din rail.
For your money you get an excellent electricity meter with a display that can measure three-phase voltage 380V-400V and single-phase voltage 230V or electricity consumption. Sinotimer DDS024T supports IEC 62053-21
IEC 62053-21
IEC 62053-21:2003+A1:2016 Applies only to newly manufactured static watt-hour meters of accuracy classes 1 and 2, for the measurement of alternating current electrical active energy in 50 Hz or 60 Hz networks and it applies to their type tests only. It applies only to static watt-hour meters for indoor and outdoor application consisting of a measuring element and register(s) enclosed together in a meter case. I used info from this web.
Sinotimer DDS024T features:
Standard installation of 35 mm DIN rail
It can also measure single-phase 230V system
It has LED indication separately for each phase
Clear display that is backlit in blue
The screws for fixing the phase conductors to the meter are made of solid material and the power terminal is large enough even for thick conductors
It has good anti-electromagnetic interference, low power consumption, high accuracy, high overload, high stability, theft of electricity and long life
Demonstration of meter operation in practice:
I connected the 2000w heater via the AC power meter, the meter on the display showed the power consumption.
