Calibration Certificate Information for B&K 735 Sound Level Meter

[aayushi.nainwal]

If you are looking for a calibration certificate for the B&K part 735 Sound/Decibel Level Meter, kindly note that we have contacted the manufacturer regarding this.

According to their response:

• This unit does not come with a calibration certificate by default.
  However, a calibration service is available upon request.
  Please go to the support section of our website, B&K Precision Corporation & start by entering the model# in the Product Support drop-down menu (on the right).
  The link for Repair/Calibration is on the bottom left of the resulting window.
  Follow the steps to sign in or set up an MY BK account. An account is required to obtain an RMA number. If needed you will be able to find pricing & warranty information at that site as well.
  To see Calibration and Repair Cost Estimation (if available), please visit:
  B&K Precision Corporation

Applicable Part Numbers

DigiKey Part Number	Manufacturer Part Number
BK735-ND	735
BK732A-ND	732A

[Liza]

Ugh, chasing those old factory certs for high-end gear is always a nightmare. The B&K 735 is a classic, but the paperwork trail can be tough!

For a meter like that, which is often used for official compliance or precision work (Class 1 standard), your absolute best bet is to go straight to the source: Bruel & Kjaer’s official service network or one of their major distributors. With the serial number, they are the only ones who will have the actual, traceable, original documentation archived. No third-party cal lab can conjure up the original factory cert.

Keep the pressure on them!

P.S. While you’re waiting on the official channels, if you just need a quick, rough reference for a modern dBA check or comparison, I’ve used this simple online meter/resource before: https://noisemeter.co/. Definitely not a replacement for your B&K cert, but sometimes useful for context!

Hope you manage to track it down!