Using the DN40 Promag H 300 Flowmeter to Document CIP and SIP Cleaning Cycles

Documenting CIP and SIP Cycles With a DN40 Promag H 300

DN40 (1-1/2 in) build: the working size for CIP supply and return headers.

A cleaning cycle is only validated if someone can show what happened during it: flow, temperature and time, cycle after cycle, without gaps. Temperature is usually recorded by the skid. Flow is where the evidence is thinnest, because many plants infer it from pump curves. A DN40 electromagnetic sensor placed on the supply or return header turns that inference into a recorded value.

What the instrument contributes to the validation file

• A continuous 4-20 mA or pulse signal that can be logged by the skid PLC alongside temperature and conductivity
• Measured cleaning velocity, which is the parameter most often assumed rather than demonstrated
• An in-line verification function (Heartbeat Technology) that produces a record without removing the sensor
• A factory calibration record delivered with the instrument, traceable to manufacturer standards

The DN40 build, order code and environment

Order code 5H3B40-AAIBAEAFBAFDCS0BA2 covers the DN40 (1-1/2 inch) sensor with a PFA liner and stainless steel housing. It spans −20 to +150 degrees Celsius, so the same unit handles chilled rinse water at the start of a cycle and hot caustic later in the same shift, with sterilisation at 150 degrees Celsius and 5 bar for up to 60 minutes inside the series envelope. The hygienic housing is rated up to IP69, which matters in a room where washdown hoses are used daily.

Placement rules that keep the data honest

Install the sensor where the pipe runs full in both cleaning directions, ideally in a vertical riser on the return leg, with the transmitter accessible for the operator who signs the record. Avoid mounting immediately downstream of a valve that throttles, because the resulting profile biases the reading. If the circuit is cleaned in reverse flow, confirm that the configuration is set for bidirectional measurement so the totaliser keeps counting during backflush.

Availability

Stock units ship within three to five working days, with one piece as the minimum order and a 12-month warranty. Audit documentation, material certificates and connection adapters can be supplied together with the instrument. Share your cleaning regime and skid drawing, and we will confirm the size and the connection before the order is placed.

Contact our instrumentation team for stock confirmation, datasheets and hygiene documentation.