MNM Scales 2,500 lb Stainless NTEP Single-Ended Shear Beam Guide: 3 mV/V, Wiring & Interchanges
- pete8781
- Jul 29
- 3 min read
Need help matching this load cell to an existing scale or planning a new weighing system? Call MNM Scales at (832) 290-3120 or email mnmscales@yahoo.com.
MNM Scales 2,500 lb Stainless NTEP Single-Ended Shear Beam Guide
The MNM Scales 2,500 lb stainless NTEP single-ended shear beam load cell is a moisture-sealed industrial weighing sensor supplied with a foot and spacer for floor-scale, platform-scale, hopper, tank and replacement applications. Its published 3.00 mV/V output, 350-ohm-class bridge and common four-wire color code make it a practical option for service technicians and scale builders who need a stainless Legal-for-Trade-capable shear-beam format rather than an S-type tension sensor.
Published Technical Specifications
Specification | MNM published value |
Capacity | 2,500 lb |
Rated output | 3.00 ± 0.015 mV/V |
Nonlinearity / hysteresis | ±0.02% FS / ±0.02% FS |
Repeatability | ±0.01% FS |
Creep, 30 min | ±0.02% FS |
Zero balance | ±1.00% FS |
Input / output resistance | 385 ± 5 Ω / 350 ± 3 Ω |
Insulation resistance | ≥ 5000 MΩ |
Excitation | 10 V DC/AC |
Compensated / operating temperature | -10°C to 50°C / -20°C to 60°C |
Safe overload | 120% FS |
What 3 mV/V Means
The 3.00 mV/V rating describes the sensor’s nominal full-scale electrical output relative to excitation voltage. With 10 V excitation, a nominal 3 mV/V cell produces roughly 30 mV of differential signal at full rated load before the indicator converts that signal into weight. This is a common industrial load-cell output level and is one reason the sensor can integrate with many compatible weighing indicators, transmitters and junction-box systems.
Four-Wire Color Code
Wire | Function |
Red | +Input / +Excitation |
Black | -Input / -Excitation |
Green | +Output / +Signal |
White | -Output / -Signal |
Why Stainless Steel and Moisture Sealing Matter
Floor scales, hopper systems and process scales live close to washdown, condensation, humidity, product spills and dirty industrial floors. Stainless construction improves corrosion resistance compared with ordinary plated alloy steel, while moisture sealing helps protect the strain-gauge bridge and wiring. Environmental protection is valuable, but the cable entry, junction box, connectors and mounting hardware still need to be installed for the conditions of the actual scale.
Published Interchange Families
MNM lists the following interchange families for this load cell: Artech SS30310, Celtron SQB SS, HBM B35, Revere 9123, Rice Lake RL35023S, Rice Lake RL39123, Sensortronics 65023SS and Coti Global CG-23SS. Those model names are valuable when a service technician is searching for a replacement for an existing platform or process scale. The dedicated replacement article explains the checks to make before swapping a cell.
Where a 2,500 lb Single-Ended Shear Beam Is Used
Four-cell floor and platform scales.
Hoppers, tanks and batching vessels supported at multiple points.
Bench or pallet-style industrial weighing platforms.
OEM machinery that needs a compact compression/weighing sensor.
Replacement of a compatible stainless single-ended beam in an existing scale.
Installation Basics
A shear beam normally has a fixed mounting end and a loading end. The beam must be oriented so the intended vertical force reaches the loading point without the structure rubbing, binding or transferring weight around the sensor. In multi-cell platforms, leveling feet should share the dead load and the deck should move freely enough that each cell can respond. Route the cable with strain relief and protect it from abrasion, pinch points and standing water.
Calibration After Installation
A replacement load cell is only one part of the weighing system. After installation, verify mechanical loading, check corner response in multi-cell platforms, trim the junction box if needed, then perform zero and span calibration at the indicator with suitable known test loads. The dedicated calibration guide covers the sequence in detail.
Troubleshooting Common Symptoms
An unstable zero often points to mechanical movement, water intrusion elsewhere in the system, damaged cable or an unstable connection. Large corner differences usually point to platform leveling, junction-box trim or one cell carrying a different share of the load. A dead cell can be checked by measuring bridge resistance and signal response with proper test equipment. A reversed weight direction can result from swapped signal polarity at the junction box or indicator.
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