Skip to main content
Home / Sensors / QLST IoT Module Weighing Sensor, 4G Wireless RS485 Communication, High-Precision 6-Digit Instrument Display

Attributes

Brand -
Category Robotics / STEM Teaching Tools / Sensors
Origin -
Communication Protocol 4G LTE / RS485 Modbus RTU
Display Resolution 6-Digit High-Precision LED
Power Supply DC 12V - 24V Wide Voltage Input
Sampling Rate Up to 1200 times per second
Operating Temperature -20°C to +60°C
Connectivity Built-in 4G Antenna with SIM Slot
Material Housing Industrial Grade ABS Plastic
Protection Rating IP65 Dust and Water Resistant
Supported Load Cells Compatible with 350Ω Strain Gauge Sensors
Data Logging Cloud Storage via MQTT/HTTP Protocols

6 reviews

A

Anonymous

Mar 10, 2026

Rating: 5/5

Robust build quality

Used this in a dusty warehouse environment for three months now. The IP65 rating holds up well, and there has been no drift in the sensor readings. The ability to send data directly to our cloud dashboard saves us hours of manual logging.

A

Anonymous

Mar 09, 2026

Rating: 4/5

Great precision, setup takes time

The weighing accuracy is impressive for industrial use. Setting up the APN settings for the 4G network took a bit of trial and error, but once connected, it has been rock solid. Support documentation could be more detailed.

A

Anonymous

Mar 09, 2026

Rating: 5/5

Excellent value for IoT projects

Compared to other wireless weighing indicators, this offers the best balance of price and features. The Modbus implementation is standard and works with our SCADA system without custom coding. Highly recommended for automation engineers.

A

Anonymous

Mar 09, 2026

Rating: 5/5

Reliable data transmission

We needed a solution that could handle high-frequency sampling and transmit it wirelessly. This module handles 1200Hz sampling without dropping packets. The real-time visibility into our production line weights has improved our inventory management significantly.

A

Anonymous

Mar 07, 2026

Rating: 4/5

Solid performance

The unit boots up quickly and maintains a strong signal even in our metal-heavy factory floor. The only minor issue is the menu navigation which feels a bit clunky, but since we mostly rely on the remote data, it's not a dealbreaker.

A

Anonymous

Mar 04, 2026

Rating: 5/5

Perfect for remote silo monitoring

We installed these modules on our grain silos where wiring was impossible. The 4G connection is stable, and the RS485 integration with our existing PLC system was seamless. The 6-digit display is bright and easy to read from a distance.

5 FAQ

Q: Can I power this device using a solar panel setup?

A: Absolutely. Since the device operates on a wide DC 12V-24V input, it is fully compatible with standard solar panel and battery backup systems commonly used in remote agricultural or industrial sites.

Q: Does this module support direct connection to AWS IoT Core?

A: Yes, the QLST module supports MQTT protocol which allows direct integration with AWS IoT Core, Azure IoT Hub, and other major cloud platforms using standard credentials.

Q: How do I calibrate the sensor if the readings seem slightly off?

A: Calibration can be performed via the front panel buttons or remotely through Modbus commands. Please refer to section 4.2 of the user manual for the step-by-step span and zero calibration procedure.

Q: Is the SIM card included or do I need to purchase one separately?

A: The SIM card is not included. You will need to provide your own nano-SIM card with an active data plan from a local carrier that supports 4G LTE networks in your region.

Q: What is the maximum cable length for the RS485 connection to the load cell?

A: For optimal signal integrity, we recommend keeping the shielded twisted pair cable under 100 meters. If longer distances are required, signal repeaters may be necessary.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
Large Area Hollow Advertising Sign Spray Paint Stencil Customizable Bendable Lettering Board Wall Slogan Brushing Soft Mold

Large Area Hollow Advertising Sign Spray Paint Stencil Customizable Bendable Lettering Board Wall Slogan Brushing Soft Mold

$5.00

Heavy-Duty Kitchen Sink Storage Rack, Dust-Proof Dish Drainer, Multi-Function Bowl Organizer

Heavy-Duty Kitchen Sink Storage Rack, Dust-Proof Dish Drainer, Multi-Function Bowl Organizer

$85.00

Xinda Outdoor Waterproof Backpack - IPX7 Wet/Dry Separation Rucksack for River Trekking, Mountaineering, Snorkeling, Swimming, and Rafting

Xinda Outdoor Waterproof Backpack - IPX7 Wet/Dry Separation Rucksack for River Trekking, Mountaineering, Snorkeling, Swimming, and Rafting

$109.55

[Damai Patented Microneedle Hair Transplant] Hairline + Eyebrow Planting | 1000 Grafts Hairline + Both Eyebrows

[Damai Patented Microneedle Hair Transplant] Hairline + Eyebrow Planting | 1000 Grafts Hairline + Both Eyebrows

$17,800.00

Pure Wool Calligraphy Felt Mat – Thickened, Wear-Resistant Fabric for Chinese Painting and Brush Writing; Custom Desk Pad

Pure Wool Calligraphy Felt Mat – Thickened, Wear-Resistant Fabric for Chinese Painting and Brush Writing; Custom Desk Pad

$1,440.00

Welding Fume Purifier – Effective Collection and Control of Welding Smoke and Dust

Welding Fume Purifier – Effective Collection and Control of Welding Smoke and Dust

$12.40

FRP Stair Nosing, Yellow Anti-Slip Stair Treads with Granular Surface

FRP Stair Nosing, Yellow Anti-Slip Stair Treads with Granular Surface

$64.00

Stainless Steel Reaction Kettle, Emulsifying Tank, Electric Heating Reactor, Enamel-Glass Silicone Oil Reactor, and Mixing Vessel

Stainless Steel Reaction Kettle, Emulsifying Tank, Electric Heating Reactor, Enamel-Glass Silicone Oil Reactor, and Mixing Vessel

$2,700.00

Wholesale Acrylic Markers in Bags, Student Water-Based Ink Pens, Eco-Friendly Non-Toxic Drawing Pens with Layering Capability

Wholesale Acrylic Markers in Bags, Student Water-Based Ink Pens, Eco-Friendly Non-Toxic Drawing Pens with Layering Capability

$5.80

Oil Pastel Blending Pen and Smudge Tool Set - Soft Tip Sponge Balls and Scrapers for Heavy Color Wax Crayon Blending and Painting

Oil Pastel Blending Pen and Smudge Tool Set - Soft Tip Sponge Balls and Scrapers for Heavy Color Wax Crayon Blending and Painting

$12.50

Lechuang Commercial Electric Heated Display Warmer - Countertop Food Warmer for Cooked Foods, Bread, and Pizza

Lechuang Commercial Electric Heated Display Warmer - Countertop Food Warmer for Cooked Foods, Bread, and Pizza

$1,250.00

Model 2500-480 Independent Rotary Die Second-Hand Special Sale Independent Light Pressure Front Edge with Die Cutting Speed 120-150

Model 2500-480 Independent Rotary Die Second-Hand Special Sale Independent Light Pressure Front Edge with Die Cutting Speed 120-150

$2,000.00

Fishing Alarm Portable Electronic Fishing Bite Alarm Night

Fishing Alarm Portable Electronic Fishing Bite Alarm Night

$60.27

Shengxitao 304 Stainless Steel Expandable Dish Drainer Basket for Kitchen Sink, Dish Rack Organizer

Shengxitao 304 Stainless Steel Expandable Dish Drainer Basket for Kitchen Sink, Dish Rack Organizer

$58.60

Industrial Scouring Pad with Abrasive Grit - Sandpaper Cloth for Rust Removal, Polishing, and Dishwashing

Industrial Scouring Pad with Abrasive Grit - Sandpaper Cloth for Rust Removal, Polishing, and Dishwashing

$0.34

Traveling-Type Air Flotation Skimmer and Foam Remover, Reciprocating Fully Automatic Oil Skimming and Floating Debris Removal Machine

Traveling-Type Air Flotation Skimmer and Foam Remover, Reciprocating Fully Automatic Oil Skimming and Floating Debris Removal Machine

$5,159.00

Language of Drums Motion Path Set Drum Creativity Essence Rhythm Drum Kit Teaching Material Jazz Drum

Language of Drums Motion Path Set Drum Creativity Essence Rhythm Drum Kit Teaching Material Jazz Drum

$59.17

1.9m Wide-Format Sublimation Printer for Pillows, Garments, and Fabric Digital Printing

1.9m Wide-Format Sublimation Printer for Pillows, Garments, and Fabric Digital Printing

$600.00

Automatic Retractable Air Hose Reel - Pneumatic Shrinking Hose Drum Combo for Auto Repair (Air, Electric, Water) - National Standard

Automatic Retractable Air Hose Reel - Pneumatic Shrinking Hose Drum Combo for Auto Repair (Air, Electric, Water) - National Standard

$228.00

Marie's Paper Blending Stumps Thickened Xuan Paper Blending Stumps Marie's Student Sketch Set Blending Stumps Rubbing Cotton Painting Special Paper Blending Stumps Smudging Pens Art Supplies Xuan Paper Sketch Fixative

Marie's Paper Blending Stumps Thickened Xuan Paper Blending Stumps Marie's Student Sketch Set Blending Stumps Rubbing Cotton Painting Special Paper Blending Stumps Smudging Pens Art Supplies Xuan Paper Sketch Fixative

$5.09

Inner Mongolia Milk Skin Processing Equipment - Condensed Milk and Butter Production Line, Fully Automatic Cheese Making Machine

Inner Mongolia Milk Skin Processing Equipment - Condensed Milk and Butter Production Line, Fully Automatic Cheese Making Machine

$13,580.00

Yijiayi Plastic Surgery - Hair Follicle Analysis to Assess Growth, Prevent Hair Loss, and Plan Transplants

Yijiayi Plastic Surgery - Hair Follicle Analysis to Assess Growth, Prevent Hair Loss, and Plan Transplants

$10.00

Hell Training Rock Guitar by Shinichi Kobayashi - Electric Guitar Speed Playing Tutorial

Hell Training Rock Guitar by Shinichi Kobayashi - Electric Guitar Speed Playing Tutorial

$106.00

Mai Da Chu Commercial Food Warmer Cabinet, Large-Capacity Constant-Temperature Heating Cart for Banquets, Hotels, and Kitchens

Mai Da Chu Commercial Food Warmer Cabinet, Large-Capacity Constant-Temperature Heating Cart for Banquets, Hotels, and Kitchens

$8,165.00

Children's Activity Appliance Storage Box - Case for Braces, Underbite Correctors, Expanders, and Denture Cleaning

Children's Activity Appliance Storage Box - Case for Braces, Underbite Correctors, Expanders, and Denture Cleaning

$16.80

Stainless Steel Cable Raceway Arc-Shaped Anti-Step Floor Metal Surface Mount Decorative Invisible Wire Channel

Stainless Steel Cable Raceway Arc-Shaped Anti-Step Floor Metal Surface Mount Decorative Invisible Wire Channel

$2.50

Electric Watercolor Spray Pen Children Hand-painted Color Pa

Electric Watercolor Spray Pen Children Hand-painted Color Pa

$46.55

408 Fast-Drying Glue - Strong Low-Whitening Instant Adhesive for Metal and Plastic, Heat Resistant

408 Fast-Drying Glue - Strong Low-Whitening Instant Adhesive for Metal and Plastic, Heat Resistant

$53.12

UE5.1-5.7 Ancient Sci-Fi Gate Model Instrument Consultation

UE5.1-5.7 Ancient Sci-Fi Gate Model Instrument Consultation

$2.00

Biliansheng Hair Transplant - Non-Shave Female Hairline Restoration & Density Enhancement

Biliansheng Hair Transplant - Non-Shave Female Hairline Restoration & Density Enhancement

$19,999.00