Minol Zenner IUF DN250 Ultrasonic Heat Meter

Minol Zenner IUF DN250 Ultrasonic Heat Meter

• Minol ZENNER IUF Large Diameter ultrasonic heat meter
• Body size DN250 (10”), nominal flow rate Qn 400 m³/h
• Maximum flow rate qs 800 m³/h, minimum flow rate qi 4 m³/h
• Body length (L) 600 mm (400 and 450 mm optional), DN250 flange connection
• Communication: Wired M-Bus (wireless wM-Bus OMS optional)
• Application: heating and cooling; installation point: return line
• MID approval: Germany, accuracy class 2
• Pressure rating: PN16

Minol ZENNER IUF Large Diameter Series

Minol ZENNER IUF is a flanged ultrasonic heat meter set for large-diameter heating and cooling lines: it consists of the IUF flow sensor with two ultrasonic measuring paths, a calculator unit and a PT1000 sensor pair.

The flow sensor transmits the measured volume to the calculator unit as a pulse signal; energy calculation and data logging take place in the calculator unit. Thanks to the two-path design, no straight pipe runs are required at the inlet or outlet.

Key Features (manufacturer data)

• Two ultrasonic measuring paths; no moving parts in the flow sensor
• No straight inlet or outlet pipe runs required; can be installed in any position (including upside down)
• MID type-examination certificate DE-19-MI004-PTB031 for heat metering, accuracy class 2 (EN 1434-1)
• Flow sensor protection class IP68; medium temperature 1–105 °C
• Body lengths compatible with mechanical Woltman WP and WS flow meters
• The flow sensor runs on a 3.6 V lithium battery; the manufacturer specifies a battery life of up to 12 years

Applications

• Main inlets of blocks and buildings
• Boiler room and heating plant outlets
• Main lines of large buildings such as hotels, hospitals and shopping malls
• District heating and industrial plant connections

Why Minol ZENNER IUF Large Diameter?

The IUF series offers a continuous range of sizes from DN50 to DN300 and allows old mechanical Woltman metering points to be converted to ultrasonic metering without major alterations. Long service life and maintenance-free measurement are important for metering at building and heating-plant level.

Installation, Reading and Re-verification

Install the meter in the position and at the mounting point specified in its manual; a strainer upstream of the meter and an isolating valve before and after it (for easy replacement) are recommended. In Türkiye, Novus Energy also provides remote meter reading and heat cost allocation services after installation. Periodic re-verification requirements for heat meters depend on local regulations; see our re-verification and calibration page for details.

Other models in the same size: DN250 heat meters · All products of the brand: Minol · What is a heat meter and how do you choose one?