MNM GX-1-4K Four 4,000 lb Shear Beam Load Cell Kit Guide
- pete8781
- Jul 30
- 4 min read
Call MNM Scales at (832) 290-3120 or email mnmscales@yahoo.com for current availability, replacement matching, junction-box questions, or help deciding whether this four-cell 4,000 lb package fits your platform, floor scale, hopper, tank or custom weighing project.
The MNM GX-1-4K four 4,000 lb shear beam load cell kit is a small-envelope alloy-steel four-cell package intended for platform, floor-scale and process-weighing builds where four supported corners share the load. MNM’s listing includes four 4,000 lb shear beams, four 1/2-20 feet and four spacers, giving scale builders the primary mechanical components needed for a four-point weighing structure. Buyers searching for a 4,000 lb shear beam load cell, four-load-cell floor scale kit, 16,000 lb component set, 3 mV/V shear beam, 350-ohm load cell or floor-scale replacement sensor will find the GX-1-4K relevant because its listing publishes unusually complete electrical and overload data.
Verified GX-1-4K specifications
MNM lists four 4,000 lb alloy-steel, small-envelope, heavy-duty shear beams with low-profile construction, thru-hole threaded mounting, 15 ft / approximately 5 m PVC cable, four 1/2-20 feet and four spacers. Published electrical data includes rated output of 3.0 ±0.25 mV/V, input resistance of 385 ±20 ohms, output resistance of 350 ±3 ohms, recommended excitation of 10–15 V AC/DC and maximum excitation of 15 V DC. Performance figures on the listing include non-linearity ±0.03% full scale, hysteresis ±0.03% full scale, non-repeatability ±0.02% full scale and creep over 30 minutes ±0.02% full scale. MNM also lists a compensated temperature range of -10 to +40 °C, 150% full-scale safe overload and 300% full-scale ultimate overload. Wiring is red excitation positive, black excitation negative, green signal positive and white signal negative.
How four 4,000 lb cells translate into system capacity
Four 4,000 lb cells provide 16,000 lb of summed nominal sensor capacity, but that does not automatically mean every platform built with them should be advertised or operated as a 16,000 lb scale. Real platform capacity depends on frame strength, deck stiffness, load distribution, off-center loading, mounting geometry, feet, stops, junction-box setup and the rated capacity assigned during calibration. A forklift wheel, pallet leg or hopper support can concentrate a disproportionate share of load on one corner. Good design therefore leaves practical headroom at each individual cell instead of assuming a perfectly even 25% load split.
Wiring four cells through a junction box
A typical four-cell floor or platform scale connects each load cell to a summing junction box. The junction box combines the four millivolt signals and often provides corner-trim adjustment. Match excitation and signal polarity carefully: red +Exc, black -Exc, green +Sig and white -Sig according to MNM’s listing. Do not assume wire colors are universal when replacing a mixed-brand cell; verify the old and new diagrams before energizing the system. Keep shield/drain practices consistent with the indicator and junction-box documentation. Route cables away from pinch points, welding leads, high-current motor wiring and sharp edges. Leave service loops rather than tensioning the load-cell cable.
Mechanical installation: what matters most
Shear beams perform best when installed on flat, rigid mounting surfaces and loaded through the intended end. Keep mounting bolts properly seated, use the supplied foot/spacer geometry as intended, and make sure the platform can settle onto all four supports without rocking. Mechanical binding is one of the most common causes of poor corner accuracy. Check that ramps, check rods, conduits, debris, welded brackets, piping or a warped deck are not bypassing the load cells. For tanks and hoppers, flexible connections around product lines can be just as important as the sensors themselves because rigid piping can carry weight around the cells.
Calibration and corner balance
After installation, level the platform, verify every cell responds, perform corner testing and trim the junction box if needed before final zero/span calibration. Put the same test load near each supported corner and compare readings. If one corner differs, confirm mechanics and wiring first, then use the junction-box trim according to its documentation. Only after corner response is reasonably balanced should you set zero and apply a known calibration load for span. The dedicated GX-1-4K calibration article linked below explains this sequence in more detail.
Applications
The four-cell GX-1-4K package can support custom floor scales, pallet scales, warehouse platforms, fabrication weighing fixtures, bins, ingredient hoppers, batching vessels and other four-point structures when the mechanical design suits the loads. For warehouse platforms, protect cells and cables from impacts and concentrated wheel loads. For process vessels, manage piping and agitation forces. For custom machinery, separate weighing forces from frame reaction loads and lateral restraint. In all cases, a four-cell kit is a component set rather than a complete certified scale: the final frame, junction box, indicator, calibration and legal-for-trade requirements are separate design decisions.
Maintenance and troubleshooting
Inspect feet, mounting bolts and cable entry points periodically. A platform that suddenly develops a corner error often has debris under the frame, a shifted foot, a damaged cable, moisture in a junction box, a loose terminal or physical contact with a nearby structure. A scale that is stable but consistently wrong may need span verification. A scale that drifts is more likely to have mechanical binding, moisture, temperature effects or an unstable electrical connection. If one corner is dead, isolate the cell electrically and compare its millivolt response with the other three before replacing parts. After any load-cell replacement, repeat corner balance and system calibration.
Related GX-1-4K guides
Read the GX-1-4K corner-trim and calibration guide, the floor/pallet/warehouse application guide and the hopper/tank/batching guide.
Frequently asked questions
Does the kit include four load cells? Yes. MNM lists four 4,000 lb cells. Are feet included? Yes, four 1/2-20 feet and four spacers are listed. What is the output? 3.0 ±0.25 mV/V. What bridge resistance is published? 385 ±20 ohms input and 350 ±3 ohms output. What are the wire colors? Red +Exc, black -Exc, green +Sig and white -Sig. Can I connect all four directly to one indicator? In a typical floor-scale design they are summed through a junction box; verify indicator excitation capacity and junction-box design. Is 16,000 lb automatically the finished scale rating? No. Final capacity depends on the full mechanical/electrical design and load distribution. Do I need corner calibration? Four-cell systems should be corner tested and trimmed when necessary before final span calibration.
Where to buy
Order the four-cell GX-1-4K package from MNM Scales and contact MNM for help matching the load cells to an indicator, summing box, platform size or replacement application.
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