Original price was: $199.00.$99.00Current price is: $99.00.
The MNM Scales LP7515 indicator is a 4-pin replacement head for Optima OP-902 and similar bench, floor, animal, and chute-scale systems. It uses a 6-digit 0.7 in backlit LCD, RS-232 output, a stainless wall-mount bracket, and the included AC adapter.
Description
MNM Scales LP7515 Indicator for OP-902 Systems
The LP7515 indicator is a compact digital readout for industrial and farm scale bases that need a simple replacement head. For example, this MNM Scales listing is the 4-pin / 4-prong version commonly used in place of an Optima OP-902 display. Confirm the connector on your existing cable before ordering; the 5-pin LP7515 is a different MNM Scales listing.
In addition, the indicator shows weight on a 6-digit 0.7 in backlit LCD and supports lb, oz, and kg. Gross, tare, zero, hold, idle, and automatic power-off functions are included. A stainless bracket is supplied for table or wall mounting.
Verified LP7515 Indicator Specifications
| Model | LP7515 (MNM Scales 4-pin / OP-902 replacement) |
|---|---|
| Display | 6-digit 0.7 in LCD with backlight |
| Weighing units | lb / oz / kg |
| Functions | Gross, tare, zero, hold, animal weighing, checkweighing, accumulate |
| Accuracy class in documentation | OIML III, n=3000e. This is not a U.S. NTEP Certificate of Conformance. Do not treat OIML class as legal-for-trade approval. |
| Display resolution | Up to 1/15,000 |
| Display increment | Selectable 1, 2, 5, 10, 20, 50 |
| Load-cell capacity | Up to four 350 Ω cells |
| Excitation | Approximately 3.3 VDC |
| Connector on this listing | 4-pin / 4-prong male connection |
| Data output | RS-232 |
| Power | Included AC adapter, plus battery operation. This listing’s current package notes AA cells; some LP7515 documentation lists 3 AAA cells. Use the cells specified with the unit you receive. |
| Operating temperature | −10 to 40 °C / 14 to 104 °F; 90% RH or less, non-condensing |
| Included accessories | Stainless wall-mount bracket, AC adapter, connector, calibration instructions |
What Is Included
- MNM Scales LP7515 digital indicator
- 4-pin connector for OP-902-style cables
- Stainless steel wall-mount / table bracket
- AC adapter
- Calibration instructions
However, a 15 ft replacement homerun cable is sold separately when your existing cable does not match.
Typical LP7515 Indicator Applications
- Replacement readout for Optima OP-902 4-pin bench and floor scales
- Animal, chute, and livestock scale display heads
- General industrial weighing with up to four 350 Ω load cells
- Portable setups that need battery or AC power and a hold function
Setup and Calibration
Therefore, mount the indicator on a stable surface or the included bracket. Connect the 4-pin scale cable, apply power, and zero the empty system before use. Recalibrate after installation, cable changes, or a new load cell. However, if the display will not zero or the reading is unstable, check excitation wiring, cell count, and the selected increment before assuming the head is defective.
Need help matching a cable or walking through calibration? Contact MNM Scales and reference model LP7515.
LP7515 Indicator Manual
Download the LP7515 indicator user manual (PDF) hosted on MNM Scales. Use this file for keypad functions, parameter settings, RS-232 format, and calibration steps.
Related MNM Scales Resources
- Browse scale indicators
- 15 ft replacement cable for OP-902 / LP7515
- Scale service and calibration in Houston
- Contact MNM Scales
Houston Calibration and Support
Moreover, MNM Scales ships from Cypress / Houston, TX. For on-site or lab calibration after you install the LP7515, see the AllScales USA calibration and industrial-scale resources.
Frequently Asked Questions
Is this LP7515 indicator a replacement for the Optima OP-902?
Yes. For example, this listing is the 4-pin / 4-prong LP7515 commonly used as an OP-902 replacement head. Confirm pin count on your cable before ordering.
Does the LP7515 have a 4-pin or 5-pin connector?
However, this SKU is the 4-pin version. MNM Scales also lists a 5-pin LP7515. The two heads are not interchangeable without the matching cable.
Is the LP7515 NTEP certified or legal for trade?
However, no U.S. NTEP Certificate of Conformance is claimed for this listing. Documentation may show OIML III, n=3000e. That is not the same as NTEP legal-for-trade approval.
How many load cells can the LP7515 power?
In addition, typical LP7515 documentation supports up to four 350 Ω load cells.
Does the LP7515 include RS-232?
Yes. Therefore, RS-232 is on the rear of the indicator for compatible printers or data connections.








Ron –
This is a very good indicator, easy to connect and calibrate it. The price was awesome and unbelievable shipping. I had to call MNM scales to get help with calibration and the tech was so nice and helpful, I wish I could place 100 star 🙂
Ella –
seller, very professional, it looked like a good unit, amazing