Siemens T230-C21C ULTRAHEAT is an ultrasonic heat and cooling meter with a nominal flow rate of 1.5 m³/h, designed for measuring energy consumption in heating and cooling systems. It features a compact construction length of 110 mm and a G 3/4 connection, making it suitable for installation in the return (cooler) pipe. The device is suitable for installers and apartment building managers who need reliable measurement without moving parts in the flow section.

Features

Ultrasonic measuring principle without moving parts in the flow section
Measuring range 1:100 according to EN 1434:2007, total range 1:1000
Removable evaluation unit with a large, easy-to-read display
Measurement of flow and power including maximum values
Two adjustable billing days within 24 months and an annual billing day
Battery life of up to 11 years
Optical interface according to EN 62056-21:2003 and interface for remote reading
Self-diagnostics of the device
Permanently integrated Pt500 temperature sensors
Flow section made of plastic, consumption display in kWh
Possibility of separate installation of the flow and evaluation sections (1.5 m connecting cable)

Technical data

Series	ULTRAHEAT T230 (Siemens / Landis+Gyr)
Nominal flow qp	1.5 m³/h
Flow range	0.015 to 3 m³/h
Construction length	110 mm
Connection	G 3/4"
Pressure loss at qp	135 mbar
Kv	4.1 m³/h
Temperature sensors	Pt500, type PS, 16 bar / 95 °C
Connecting cable	1.5 m

How it differs from the WFM5.. series: The T230 measures by ultrasound, so it has no moving parts in the flow section, and its measuring range is 1:100 according to EN 1434:2007. The WFM5.. series meters are vane-type (mechanical), with a temperature measurement cycle of 36 seconds and a battery life of 10 years.