• GY-300 Indicator Controller
  • GY-300 Indicator Controller
  • GY-300 Indicator Controller
  • GY-300 Indicator Controller


The GY-300 is an NTEP approved weight indicator and controller built for factory critical processes. Ideal for highspeed legal for trade scales which require maximum uptime. The system records weight while also controlling other peripherals and outputting organized data to a PC or plant server.


  • Critical function scales
  • High speed scales
  • Hot scale
  • Cold scale


  • NTEP approved as a legal for trade scale indicator and control box
  • Sophisticated load cell signal filtering for more accurate weight calculations
  • Customizable functionality allows for a user interface designed specifically to the application
  • Convenient box latches and water tight seal for washdown protection
  • Bright 7 segment LEDs clearly and reliably display information
  • RS232, RS422, 20mA, and ethernet conversion communication busses allow for communication with peripherals and PCs


Electrical Specification
Line Voltage
Power Consumption
1.5A Max at 115VAC
Circuit Protection
EMI Protection
Physical Specification
Dimension (WxHxD)
Enclosure Material
Stainless Steel
Enclosure Rating
NEMA 4x/IP66
Weighing Specification
Excitation Voltage
+12VDC, up to 4 x 350 Ohm load cells
Signal Input Range
0 mV to +36 mV
Max Weight Display
System Linearity
+/- 0.01% to 10KHz
+/- 0.03% to 30KHz
User Interface
5.2’’ x 0.8’’
Communications and I/O
Number of I/O
Communication Ports
4 Ports, choose from
RS-232, RS-422,
20mA, Ethernet.
Operating Conditions
Ideal Operating Temperature
14°F to 104°F
(-10°C to 40°C)

NTEPNTEP approved under NTEP certificate 98-138

Get Equipment Built for Your Business
  • Equipment is custom built to your needs.
  • Our team has the experience to smoothly integrate new equipment with your existing setup.
  • Equipment is designed to simplify maintenance and maximize lifespan.
  • Scales provide accurate and reliable weights, keeping your operation efficient.
  • We support our equipment with prompt and dependable service, keeping you running smoothly into the future.
  • One year warranty & lifetime free technical phone support.

Morrison is trusted by leading companies


9 out of the 10 largest pork processing companies in the United States use Morrison Weighing Systems equipment in their plants.


All four of the “Big 4” beef producers in the United States use Morrison equipment, as well as a broad variety of independent plants.

From Our Clients

I’ve worked with Morrison Weighing Systems equipment for the past 23 years. They are like family to me. They are a friendly and devoted company and have always been there when I need help and training. Their equipment is top of the line and I would recommend it to anyone. Morrison will design and build you a custom system to your needs, they take the time and dedication to make sure it’s right and working. I wish there were more companies out there like them.

Kevin H, Smithfield Foods
Smithfield Foods

As a long time Morrison Mono-Rail carcass scale user, I can attest to its solid performance and ease of maintenance. Maintenance, when required, is simple and fast. Annual review by GIPSA and/or Weights & Measures for over ten years with no issues. Will continue to be a Morrison customer.

Dan N, Triumph Foods
Triumph Foods

We have been using Morrison Weighing for over 30 years in multiple operations within our facility. Most of these operations are critical to our daily production. They are extremely familiar with the products they sell which help keep my downtime to a minimum. They are quick to respond to an issue and this makes them exactly what I’m looking for as a vendor.

Jayson S, American Foods Group
American Foods Group