Ultrasonic heat meter

Kamstrup MULTICAL® 303
Ultrasonic heat meter with remote reading
Ultrasonic measuring principle for high accuracy and long service life
Ultrasonic measuring principle for high accuracy and long service life
Remote reading: integrated Wireless M-Bus or wired M-Bus; customizable telegrams and increased transmission power of 25 mW – suitable for fixed networks with fewer concentrators
Built-in data logger: annual, monthly, daily, hourly, and minute records
up to 16 years old
Description
MULTICAL® 303 is a compact apartment heat meter designed specifically for residential buildings. Ultrasonic technology ensures precise measurements without mechanical wear, while integrated communication modules enable reliable remote reading and easy integration into fixed networks (AMR/AMI). Thanks to its ergonomic design and the possibility of installation in various positions, the device is suitable for narrow installation niches, while the display remains easy to read. Configuration is done on site with a single button, which speeds up commissioning and reduces maintenance costs.
Технически детайлиТехнически детайли
Communication and remote reading
- Integrated Wireless M-Bus (25 mW) – customizable datagrams, optimized for fixed networks
- Integrated M-Bus (wired)
- Display of current data and statistics on LCD display
Power supply and battery
- 2 × A-cell lithium batteries
- Battery life: up to 16 years (up to ~10 years with one battery)
Measurement parameters
- Technology: ultrasonic flow meter
- Nominal flow rate (qp): 0.6…2.5 m³/h (depending on model)
- Dynamic range: up to 1500:1 (from start to saturation)
- Approved dynamic range: 250:1 (qp:qi)
Temperature ranges
Calculator
- θ: 2…180 °C
- ΔΘ: 3…178 K
Flow sensor
- θq: 2…130 °C
Set of temperature sensors (Pt500, Kamstrup 63, 2-wire)
- θ: 2…150 °C
- ΔΘ: 3…140 K
- Cable length: 1.5 m or 3 m
- Display of hourly and daily average temperatures in addition to current temperatures
Data Logger
- Recording periods: annual, monthly, daily, hourly, and minute values
- Storage (as standard): last 1400 hours, 460 days, 36 months, and 20 years (depending on the selection of registers)
Installation and construction
- Installation: horizontal, vertical, wall-mounted
- Compact form factor; the body can be rotated for better display readability
- Optimized packaging – up to 50% smaller volume compared to the previous model (lower logistics costs)
Dalsia is the official representative of Kamstrup for Bulgaria. Contact us to select the appropriate model (flow rate, communication, sensor length) and for integration into your metering system.
PRODUCTS
Other models of heat meters

Kamstrup Multical ® 403
Ultrasonic heat/cold meter with remote reading (M-Bus/wM-Bus), IP68 flow meter and battery life up to 16 years.
Learn more
Kamstrup Multical ® 603
Ultrasonic heat/cold meter with flexible communications (wM-Bus/M-Bus, Modbus, BACnet), Auto Detect, and battery life up to 16 years.
Learn more
BMeters Hydrocal M4
Turbine heat meter/cold meter. Measures the amount of energy used for heating or cooling.
Научи повечеWould you like to browse our catalog?
Visit the storeVisit our Online Store to order the latest models of heat meters.
Dalsia is the official representative for Bulgaria of the Danish company Kamstrup, a global leader in the manufacture of ultrasonic heat meters, cold meters, and water meters.
