Non demountable metal detectors ERGUARD CM


ERGUARD CM is a series of industrial metal detectors designed for detection of various metal inclusions in bulk or piece goods transported by conveyor belt.

Metal detectors ERGUARD CM are most commonly applied to control product quality and also to protect process equipment from damage caused by metal objects sticking in machinery.

Principle description:

The principle of operation of metal detectors ERGUARD CM is based on inductive balance method. The metal detector unit has three circuits: one transmitter and two receivers with null potential difference in case of metal absence. When tramp metal gets inside the detection field, the established balance is disrupted causing the detector to transmit a signal to the control panel by activating audio and visual alarm, rejection device or stopping conveyor for the time necessary to remove a product containing undesirable metallic inclusions.

The main characteristic of the metal detector is its sensitivity expressed in minimum diameter values of steel, brass and stainless steel balls, which the metal detector is able to detect at minimum belt speed and the most disadvantaged location of the balls in the detection area.

ERGUARD CM sensitivity:

  • ferrous metal (Fe) Ø ≥ 0.5 mm
  • Non-Ferrous Metals (non-Fe) Ø ≥1.0 mm
  • Stainless steel (SS440) Ø ≥ 1.0 mm


The detector sensitivity values mentioned above were obtained under ideal conditions and may vary depending on installation site, aperture size, frequency at which the detector operates as well as electromagnetic properties of the product.

ERGUARD CM has the highest sensitivity among all types of metal detectors and can easily fit into any production line regardless conveyor speed and type or height and width limits. However, when fitting the metal detector into the existing conveyor non-demountable housing of this model causes the necessity to split conveyor belt with its subsequent splicing (lacing).

Metal detector ERGUARD CM can be mounted on horizontal or inclined conveyor section.

Depending on purpose and application the detector housing can be made of painted or stainless steel.


Metal detector standard model ERGUARD CM specifications CM

Height (H)
Width ()
100 200 300 400 500
300 700340300
55 kg
65 kg
80 kg
- -
400 800340300
60 kg
70 kg
90 kg
110 kg
500 900340300
65 kg
85 kg
105 kg
130 kg
160 kg
600 1000340300
70 kg
90 kg
110 kg
135 kg
170 kg
800 1200340300
75 kg
95 kg
120 kg
145 kg
175 kg
900 1300340300
90 kg
110 kg
140 kg
170 kg
200 kg

When choosing the model of ERGUARD metal detectors the following should be considered first of all:

  • product coarseness (sizes);
  • electrophysical properties of product;
  • shape, size, material and orientation in space of all possible tramp metals, which a product may contain;
  • type of feeding and product movement speed through the detection area of the metal detector;
  • detectors operating conditions;
  • way of rejection of the product with tramp metals from the "pure" product.

Technical specifications of ERGUARD CM:

  • Industrial protection class: IP54;
  • Number of operating frequencies: maximum two. Values of operating frequencies can be selected depending on the product characteristics, it enables sensitivity increase;
  • Memory for 10 products allows you to adjust the detector quickly and accurately;
  • High vibration resistance due to its special design;
  • Automatic system of self-diagnostics (adjustment) of the metal detector necessary to ensure its stable performance;
  • Three levels of access to settings of detector parameters in order to avoid unwanted access of the personnel;
  • Digital Signal Processing;
  • Human-engineered and simple user interface.

ERGUARD CM metal detector can be supplied as such extended options as ERGUARD ECM / EDCM. Depending on the tasks set and customers order metal detector can be completed with reject assembly and conveyor. Optional configurations are listed below.


ERGUARD CM / DCM / SCM / ECM / EDCM supplementary options:

  • Detector operating on belt with rivets;
  • Visual and audio alarm;
  • Rejection unit with alarm relay and unloading activation relay for automatic rejection of the product;
  • Rejection unit with a photosensor for automatic rejection of packaged piece of the product;
  • Differentiation of the detected metal: ferrous/nonferrous;
  • Remote control and monitoring of the detector with ModBus protocol with RS485 interface;
  • Installing another interface: RS232, Ethernet;
  • Event counter (real time clock);
  • Conveyor belt speed setting module on the part where the detector is mounted;
  • Beacon (remote warning light);
  • Remote operators panel;
  • Remote control with moisture and dust protection degree IP65;
  • Manufacturing of stainless steel housing of the detector for non-food industry;
  • Coating for highly corrosive environment;
  • Increased moisture protection;
  • Additional setting memory for variety of products (over 10);
  • Marking device;
  • Weight rejection device (checkweigher).

Drawing of ERGUARD ECM metal detector with conveyor and rejection assembly.

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