Checkweigher/Metal Detection Systems

Mettler-Toledo’s CM33 Washdown and CM35 Washdown combination systems are designed to address the needs of manufacturers operating in harsh production environments that need both metal detection and checkweighing.

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The combination systems, from product inspection manufacturer Mettler-Toledo, are designed for manufacturers of packaged food products, including dairy and meat products, who require a quick-cleaning, advanced contaminant detection, and a precision weighing solution.

The CM33 Washdown is based on the C33 PlusLine Washdown checkweigher, but with an integrated metal detector from Mettler-Toledo’s Profile range of systems. It is capable of mid-range frequency operation and throughput of up to 250ppm, with weighing accuracy of up to +/- 0.2g. With the CM35 Washdown, manufacturers get a system that is capable of a high frequency range and high sensitivity.

To complete their combination CM33 Washdown or CM35 Washdown, customers can choose one of three stainless steel Mettler-Toledo Profile metal detectors: one for small, packaged products, one for bulk, dry product applications, and one that delivers maximum sensitivity in challenging applications.


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The combination CM33 Washdown and CM35 Washdown reduce downtime when cleaning due to their smart hygienic design. This makes them ideal for use in applications that require stringent cleaning processes using caustic cleaning agents to combat bacterial contamination risks, without compromising their weighing accuracy and detection sensitivity. Potential applications include yogurt cups and cheese trays without aluminium foil lids. These are the kinds of applications where ingredients can spill over and contaminate parts of the product inspection machinery, hence requiring robust washdown cleaning.

Quick and efficient cleaning is aided by the washdown systems’ sloped surface design, which discourages liquid or debris collection. Ingress protection is also a key design factor: the CM33 Washdown and CM35 Washdown and their Human-Machine Interfaces (HMIs) are IP69 rated, therefore able to resist the most caustic detergents and disinfectants. Together, these hygienic design features reduce the amount of operational downtime needed to efficiently complete rigorous cleaning regimes.


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