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ESMTS300 Miniature postal scales load cell sensor with 50kg

The ESMTS300 foil strain gauge sensor belongs to the strain-type single-beam weighing sensor. Its main body uses alloy steel or stainless steel foil as the elastic element, featuring a thin structure, small deformation under load, high stability, and low cost. Its working principle relies on the foil undergoing tiny elastic deformation when stressed. The strain gauge attached to the surface of the foil stretches or compresses accordingly, causing a change in resistance, which is converted into a proportional weak voltage signal through a Wheatstone bridge. After amplification and acquisition, it outputs weight or pressure values.

It has a simple overall structure, small size, fast response, good linearity, strong repeatability, built-in basic temperature compensation, and good anti-drift capability. Steel hardness is high, with overload resistance better than aluminum alloy, impact resistance, and suitability for long-term steady pressure measurement. Commonly it features four-wire output, compatible with HX711 and weighing instruments, easy to install, and suitable for batch integration. Protection usually reaches IP64–IP65, providing dust and splash resistance.

It is widely used in small appliance electronic scales, courier scales, countertop pricing scales, warehouse sorting scales, small press-fit detection, automated light-load force measurement, medical portable weighing, and smart home devices. It is the most widely used, cost-effective basic model of foil-weighted strain sensors on the market.

    Working Principle

    When an object is placed on a sensor, gravity causes the elastomer of the sensor to undergo slight elastic deformation. The strain gauges attached to the elastomer also deform accordingly, resulting in a change in their resistance. The strain gauges are usually connected in a Wheatstone bridge circuit, and the change in resistance causes the bridge to become unbalanced, thereby outputting a faint voltage signal proportional to the gravity applied. This signal is then processed through amplification, filtering, and A/D conversion, ultimately converting it into a display of the object's weight.

    Product Features

    1. High precision
    2. Good stability
    3. Diverse structures
    4. Mature technology
    5. Simple structure, relatively low cost
    6. Easy to process and install

     APPLICATION  SCENARIOS

      1. Commercial Electronic Scales
      Pricing scales, tabletop scales, bench scales, express scales, sorting scales, cashier scales, fruit and vegetable scales, supermarket weighing equipment.
      2. Industrial Automated Weighing
      On-line weighing on production lines, product weight checking, missing parts detection, portioning weighing, ingredient weighing, conveyor belt weight checking.
      3. Small-scale Warehousing and Logistics
      Package weighing, integrated measurement of volume and weight, barcode scanning and weighing all-in-one machines, light-duty shelf weighing.
      4. Household and Small Equipment
      Kitchen electronic scales, body weight scales, pet scales, mini precision weighing instruments.
      5. Embedded Mechanical Equipment Installation
      Packing machines, carton sealing machines, feeding machines, baking equipment, medical weighing equipment, laboratory precision weighing modules.
      6. Light-duty Platform Weighing
      Small-capacity platform scales, light-duty floor scales, pallet weighing, fixed workstation weighing detection.

      Product detail

      ESMTS300-50KG-p-1ESMTS300-50KG-p-4ESMTS300-50KG-p-3ESMLS714F-p-3

      Technical Specifications

      ESMTS300-50kg platform scale sensor

      Rated load

      50kg

      Operating temperature

      -10 ~ 50 ℃

      Sensitivity

      1.0 ± 0.2mv / v

      Zero output

      ± 1.0mv / v

      Zero temperature drift

      0.3% FS

      Non-linear

      0.3% FS

      Temperature sensitivity drift

      0.3% FS

      Lag

      0.3% FS

      Insulation resistance:

      ≥2000MΩ

      Repeatability

      0.3% FS

      Excitation voltage

      3-10vdc

      Creep

      0.3% FS

      Safe overload

      120% FS

      Input resistance

      1000 ± 5% Ω

      Output resistance

      1000 ± 5% Ω

      Comprehensive accuracy

      0.3% FS

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