DN32 Ultrasonic Heat Meters (1 1/4”)

DN32 is the threaded heat meter size for units that need a higher flow rate, such as large apartments, office floors and small commercial installations.

DN32 Heat Meter Dimensions and Selection

DN32 corresponds to a 1 1/4-inch pipe size. The technical data for the Honeywell and Novus Digitermo DN32 give a nominal flow rate (Qn) of 6 m³/h, a body length of 180 mm and a 1 1/2” connection thread. Because some DN25 models also have a nominal flow rate of 6 m³/h, do not choose DN32 on pipe diameter alone; base the decision on the design flow rate of the system and the permissible pressure loss. The product page of the Minol Zenner C5 IUF DN32 does not yet state the body length; the data sheet of the manufacturer ZENNER lists this size (version with G1 1/2B connection) only with a 260 mm length. If you are considering it as a replacement for a 180 mm meter, take the difference in length into account.

Models in This Size

• Novus Digitermo DTL-DN32 – Qn 6 m³/h, 180 mm, MID-approved (Türkiye)
• Minol Zenner C5 IUF DN32 – built-in wired M-Bus, 3 pulse inputs
• Calmet PM02-DN32 – built-in wired M-Bus
• CEM CM-HR DN32 – built-in wired M-Bus
• Honeywell DN32 – Qn 6 m³/h, 180 mm, heating only

Other sizes: DN15 · DN20 · DN25 · DN40 · Large diameter (DN50–DN300) · DN20 mechanical

Frequently Asked Questions

How many inches is a DN32 heat meter?

DN32 corresponds to a 1 1/4-inch pipe size; the models on our site have a 1 1/2” connection thread.

What is the nominal flow rate of a DN32 heat meter?

On the Honeywell and Novus Digitermo DN32 models on our site, the nominal flow rate (Qn) is 6 m³/h and the body length is 180 mm.