National Measurement Institute

Certificates of approval

Find a certificate of approval. We issue one for every measuring instrument that meets the pattern approval requirements.
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. Showing 1 to 50 out of 3331 results.
Approval/revision date Status Pattern approval number and instrument certificate Category Sub-category
25/06/2025 Current 14/2/83: Secure Model Sprint 210 Class 1 Electricity Meter 14 - Utility meters 14/2 - Electricity (utility) meters
25/06/2025 Current 6/4D/401: Tscale model P10b Weighing Instrument 6 - Weighing instruments 6/4D - Counter weighing instruments self-indicating and price-computing
25/06/2025 Current 14/2/99: Secure Meters Limited model Premier 211 - P3T5A0 Electricity Meter 14 - Utility meters 14/2 - Electricity (utility) meters
19/06/2025 Current 14/2/124: DZG Metering GmbH model MDVH3016 Class 0.2 S Electricity Meter 14 - Utility meters 14/2 - Electricity (utility) meters
19/06/2025 Current 6/4D/406: Teraoka Model LX-5600 Weighing Instrument 6 - Weighing instruments 6/4D - Counter weighing instruments self-indicating and price-computing
18/06/2025 Current 3/0B: Weights of Certain Denominations 3 - Trade measurement 1g to 20kg 3 - Metric and metric carat masses (weights)
17/06/2025 Interim P6/4D/402: Sbot Technologies CAPER CART 3 Model CAPER-V012.0 Weighing Instrument 6 - Weighing instruments 6/4D - Counter weighing instruments self-indicating and price-computing
13/06/2025 Current 6/14G/24: Digi Model WIL-700 Automatic Catchweighing Instrument 6 - Weighing instruments 6/14G - Automatic catchweighers
13/06/2025 Current 5/6E/16: Duotank Compact Delivery Unit Model CDU 0021547 Beer Flowmetering System 5 - Flowmeters 5/6E - Alimentary product flowmeters (milk etc)
12/06/2025 Current 6/4C/339: Ishida Model IPC Weighing Instrument 6 - Weighing instruments 6/4C - Counter weighing instruments self-indicating
11/06/2025 Current 6/14G/21: Mettler Toledo Model POA310 Automatic Catchweighing Instrument 6 - Weighing instruments 6/14G - Automatic catchweighers
06/06/2025 Current 6/14B/20: Active Weighing Solutions Model IPW800A Discontinuous Totalising Automatic Weighing Instrument 6 - Weighing instruments 6/14B - Automatic weighing instruments except belt weighers
06/06/2025 Current S788: Dini Argeo Model 3590EGT Digital Indicator Supplementary Digital Indicators
06/06/2025 Current 14/3/65: Diehl Metering Hydrus Type 173 Water Meter 14 - Utility meters 14/3 - Water (utility) meters
06/06/2025 Current 6/4C/321: CAS Model SWII-6CW Weighing Instrument 6 - Weighing instruments 6/4C - Counter weighing instruments self-indicating
05/06/2025 Interim 13/1/36: Mettler Toledo model TLD970 Dimensional Measuring Instrument 13 - Dimensional measuring instruments 13/1 - Dimensional measuring instruments
03/06/2025 Current 5/6E/23: Smarta Industrial Model MC104 Vehicle-Mounted Milk Flowmetering System 5 - Flowmeters 5/6E - Alimentary product flowmeters (milk etc)
02/06/2025 Current 6/14G/31 R0: DIGI model LI-700D Automatic Catchweighing Instrument 6 - Weighing instruments 6/14G - Automatic catchweighers
26/05/2025 Current S869: Rinstrum Model C320 Digital Indicator Supplementary Digital Indicators
23/05/2025 Current 14/3/70: Sanchuan DN20&DN25 Series Ultrasonic Water Meter 14 - Utility meters 14/3 - Water (utility) meters
23/05/2025 Current 14/2/96: Secure Model Liberty 120 Class 1 Electricity Meter 14 - Utility meters 14/2 - Electricity (utility) meters
21/05/2025 Current S845: Correct Weight Scales Model CWS318 PlusC Digital Indicator Supplementary
20/05/2025 Current S871: Ohaus Model Defender i-DT61PW Digital Indicator Supplementary Digital Indicators
20/05/2025 Current 14/3/67: Itron IW2 Model Water Meter 14 - Utility meters 14/3 - Water (utility) meters
20/05/2025 Current 6/4C/323: A & D Model GX-603A Weighing Instrument 6 - Weighing instruments 6/4C - Counter weighing instruments self-indicating
16/05/2025 Current 6/4C/326: Ohaus Model Defender i-D61PW30K1R6 Weighing Instrument 6 - Weighing instruments 6/4C - Counter weighing instruments self-indicating
13/05/2025 Current 14/3/73: Siconia WM20-NB28 W2P Water Meter 14 - Utility meters 14/3 - Water (utility) meters
09/05/2025 Current 14/3/77: Maddalena SJ-PLUS DN20 Water Meter 14 - Utility meters 14/3 - Water (utility) meters
07/05/2025 Current S790: Liquid Controls LLC Model LLC.iQ Calculator/indicator for Use in Liquid-measuring Systems Supplementary Calculator/Indicators for Liquid-measuring Systems (formerly flowmeter indicators)
02/05/2025 Current 14/3/75: UAB Axioma Metering Qalcosonic W1 DN20 Water Meter 14 - Utility meters 14/3 - Water (utility) meters
30/04/2025 Current S671: FMC F.A. Sening Model MultiFlow Calculator/Indicator for Liquid-measuring Systems Supplementary Calculator/Indicators for Liquid-measuring Systems (formerly flowmeter indicators)
24/04/2025 Current 6/4C/336: WIPOTEC Model HC-M-NSW 1.5k Weighing Instrument 6 - Weighing instruments 6/4C - Counter weighing instruments self-indicating
17/04/2025 Current 15/1/5: Perten Instruments Model Inframatic IM9500 Grain Protein Measuring Instrument 15 - Food analysing instruments 15/1 - Grain protein measuring instruments
15/04/2025 Current 6/9C/331: Rinstrum Model RPS1212 platform weighing Instrument 6 - Weighing instruments 6/9C - Weighing instruments self-indicating
31/03/2025 Current S870: Flintec Model FT-10 Fill Digital Indicator Supplementary Digital Indicators
20/03/2025 Current 14/3/41A: Sanchuan DN20 Series Ultrasonic Water Meter 14 - Utility meters 14/3 - Water (utility) meters
18/03/2025 Current 6/4C/332: Mettler Toledo Model BBA236-QA3 Combi PBA439 Basework Weighing Instrument 6 - Weighing instruments 6/4C - Counter weighing instruments self-indicating
17/03/2025 Current S820: Rice Lake Model Enterprises Series 1280-2A/1280-2D Digital Indicator Supplementary Digital Indicators
06/03/2025 Current S627: AWS Model EZYWeigh Point of Sale (POS) System Supplementary Point of Sale Systems
05/03/2025 Interim P6/14B/34: Systeco Fabrication Model STDEQ-BAT01-00 Discontinuous Totalising Automatic Weighing Instrument 6 - Weighing instruments 6/14B - Automatic weighing instruments except belt weighers
05/03/2025 Current 5/6B/204A: Liquid Controls Model M40 Liquid-measuring System 5 - Flowmeters 5/6B - Bulk flowmeters
24/02/2025 Current 6/14G/5: Sastek Model CIMW4LT Automatic Catchweighing Instrument 6 - Weighing instruments 6/14G - Automatic catchweighers
14/02/2025 Interim P5/1/9: (Interim Certificate) Endress + Hauser Proservo Model NMS80 Automatic Level Gauge Static Liquid Level Measuring System 5 - Flowmeters 5/1 - Static liquid measuring instruments
14/02/2025 Interim P5/1/10: (Interim Certificate) Endress + Hauser Micropilot Model NMR81 Automatic Level Gauge Static Liquid Level Measuring System 5 - Flowmeters 5/1 - Static liquid measuring instruments
13/02/2025 Current 14/2/46: EDMI Model Atlas MK10A Class 1 Electricity Meter 14 - Utility meters 14/2 - Electricity (utility) meters
13/02/2025 Current 6/4C/338: METTLER TOLEDO Model MR304 Weighing Instrument 6 - Weighing instruments 6/4C - Counter weighing instruments self-indicating
10/02/2025 Current 14/3/56: EDMI WP-20 DN20 Water Meter 14 - Utility meters 14/3 - Water (utility) meters
10/02/2025 Current 14/2/120: Genus Power Infrastructures Limited model 01B-561 Class 1 Electricity Meter 14 - Utility meters 14/2 - Electricity (utility) meters
03/02/2025 Current S691: Gilbarco SIP Model M11128 Pulse Generator for use in Flowmetering Systems Supplementary
23/01/2025 Current 6/20A/6: RDS Model Loadmaster Alpha 100 Wheeled Loader Weighing Instrument 6 - Weighing instruments 6/20A - Wheeled loader weighing instruments
Showing 1 - 50 of 3331 results

Instrument types

About certificates of approval

We issue a certificate of approval for every measuring instrument that meets pattern approval requirements.

Certificates of approval usually comprise:

  • a certificate including the advice and conditions of approval
  • a technical schedule that describes the pattern and any variants
  • a test procedure with the tests (not already covered by other published test procedures) used to verify the instrument and the maximum permissible errors of the instrument.

The types of certificates are:

  • certificates of approval for a specific variant of measuring instrument
  • supplementary certificates of approval for pattern approved modules that connect to measuring instruments
  • general certificates for instruments made to a common standard.

Certificate status:

  • Interim certificates are valid for a limited period.
  • Cancelled and expired certificates are not valid for new instruments (you can check certificates to check their validity).
  • Withdrawn certificates are not valid for any instruments (including those which may have been installed and verified prior to the withdrawal date).
  • Provisional certificates allow you to install instruments and use them for trade (under the conditions set out in the certificate) while we assess the instrument for full approval.

For accessible versions of these certificates, email our pattern approval section.

More information

Once you have a certificate of approval, your instrument will need to be verified for trade use
Find a servicing licensee to verify your instrument for trade use
Find national instrument test procedures for verifying instruments used for trade
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