Bag filling scales are available with a mechanical weighing mechanism or a digital weighing mechanism.

Mechanical Bagging ScalesHamer HGB Mechanical GW Scale
Mechanical scales have a counter balance weight system. Certified counter weights (i.e. 1, 2, or 5 lb.) are hung on the scale. A smaller weight on a slide bar (much like the old doctor’s scale) or a threaded rod is used for fine adjustment &/or taring the bag. Mechanical scales are activated by a pull lever.

Mechanical bagging scales:

  1. are less expensive
  2. are easy to set up
  3. require no electricity or compressed air
  4. typically used for free-flowing products such as: grain, seed, fertilizes, or plastic pellets.

Digital Bagging ScalesHamer 100GW Digital Gross Weigh Scale
Digital scales use load cells to measure the weight of the product. “A load cell is a transducer that creates an electrical signal whose magnitude is directly proportional to the force being measured”(1) . Digital scales have a digital display and a PLC (programmable logic controller) that is used to control the scale’s operation (i.e. open/close feed gates, clamp/unclamp bags). In addition, multiple product weight parameters can be stored that allow for easily changing bag sizes. Digital scales are activated by a whisker switch or start button.

Digital bagging scales:

  1. are more expensive
  2. are more precise
  3. require electricity (may require compressed air depending on options)
  4. can store weight programs & transmit data

(1) Wikipedia.org-Load Cell