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)
Magnetic Refrigerator Side Storage Rack - No-Drill Wall Organizer for Spices and Utensils

Magnetic Refrigerator Side Storage Rack - No-Drill Wall Organizer for Spices and Utensils

$9.10

Multi-Function Car Tire Stone Removal Hook Tool for Picking and Digging Out Debris

Multi-Function Car Tire Stone Removal Hook Tool for Picking and Digging Out Debris

$7.35

Suction Cup Sink Strainer - Disposable Kitchen Drain Filter for Food Scraps and Waste

Suction Cup Sink Strainer - Disposable Kitchen Drain Filter for Food Scraps and Waste

$14.30

Kimberly-Clark Wiper Paper, Industrial Cleaning Wipes for Oil and Grease, Factory & Laboratory Use

Kimberly-Clark Wiper Paper, Industrial Cleaning Wipes for Oil and Grease, Factory & Laboratory Use

$963.52

Loose Gold Rutilated Quartz Beads, Donghai Agate, Chalcedony, Jade, Cat's Eye, Titanium Crystal, Aquamarine, White and Yellow Crystal Single Beads for Bracelets

Loose Gold Rutilated Quartz Beads, Donghai Agate, Chalcedony, Jade, Cat's Eye, Titanium Crystal, Aquamarine, White and Yellow Crystal Single Beads for Bracelets

$8.42

Faucet Drain Mat, Non-Slip Countertop Pad for Kitchen and Bathroom, Splash-Proof Sink Organizer, Thickened Mold-Resistant Silicone Mat

Faucet Drain Mat, Non-Slip Countertop Pad for Kitchen and Bathroom, Splash-Proof Sink Organizer, Thickened Mold-Resistant Silicone Mat

$3.78

New Pirelli Tire 255/40R20 101W AO PZERO PZ4 with Silent Cotton Original Fit for Audi A6L

New Pirelli Tire 255/40R20 101W AO PZERO PZ4 with Silent Cotton Original Fit for Audi A6L

$1,358.00

Oriental Pearl Dual Porcelain Jar Gift Set: Green Tea, Black Tea, Jin Jun Mei, Pu'erh Loose Leaf Tea in Porcelain Jars

Oriental Pearl Dual Porcelain Jar Gift Set: Green Tea, Black Tea, Jin Jun Mei, Pu'erh Loose Leaf Tea in Porcelain Jars

$149.00

Purified Water Bucket Stand Inverted Water Dispenser Pump Simple Mineral Water Drinking Machine Press Pump

Purified Water Bucket Stand Inverted Water Dispenser Pump Simple Mineral Water Drinking Machine Press Pump

$10.80

New Children's Gouache Paint Brushes DIY Hand-Painted Graffiti Art Class Watercolor Acrylic Paint Brushes Bristle Round Tip Brush

New Children's Gouache Paint Brushes DIY Hand-Painted Graffiti Art Class Watercolor Acrylic Paint Brushes Bristle Round Tip Brush

$6.41

Natural Clear Quartz Fully Clean Untreated Faceted Round Rice Beads - For Women's Bracelets, Spacer Beads, and DIY Crafts

Natural Clear Quartz Fully Clean Untreated Faceted Round Rice Beads - For Women's Bracelets, Spacer Beads, and DIY Crafts

$6.63

Sponge Brushes for Kids' Crafts and Creative Painting - Student Art Stamping Tools, DIY Sponge Paintbrushes

Sponge Brushes for Kids' Crafts and Creative Painting - Student Art Stamping Tools, DIY Sponge Paintbrushes

$13.86

Jiuchenggong Liquan Ming Tang Dynasty Ouyang Xun Yao Mengqi Copybook, Regular Script Brush Calligraphy Workbook, 3 Volumes, 188 Pages

Jiuchenggong Liquan Ming Tang Dynasty Ouyang Xun Yao Mengqi Copybook, Regular Script Brush Calligraphy Workbook, 3 Volumes, 188 Pages

$17.90

Shaped Watercolor Paper Ticket Stubs - Blank Postage Stamp Bookmarks with Serrated Edges, Thickened 300g Premium Cotton Pulp, Fine Texture for Art Hand Painting, Easy Blending, High Absorbency, Wrinkle-Resistant - Perfect for Postcards and Creative Cards

Shaped Watercolor Paper Ticket Stubs - Blank Postage Stamp Bookmarks with Serrated Edges, Thickened 300g Premium Cotton Pulp, Fine Texture for Art Hand Painting, Easy Blending, High Absorbency, Wrinkle-Resistant - Perfect for Postcards and Creative Cards

$9.85

Naitong Automatic Retractable Air Hose Reel with PU Braided Hose for Pneumatic Tools and Car Detailing

Naitong Automatic Retractable Air Hose Reel with PU Braided Hose for Pneumatic Tools and Car Detailing

$119.00

Premium Wall-Mounted Aromatherapy Empty Bottle – 100ML Plastic Square Diffuser Bottle with Wall-Mount Adhesive Sticker

Premium Wall-Mounted Aromatherapy Empty Bottle – 100ML Plastic Square Diffuser Bottle with Wall-Mount Adhesive Sticker

$2.98

Leyingfang Floating Pen for Kids' Water Drawing, Colorful Water-Soluble Suspended Markers, Erasable Watercolor Pens

Leyingfang Floating Pen for Kids' Water Drawing, Colorful Water-Soluble Suspended Markers, Erasable Watercolor Pens

$13.80

Loose Rose Quartz Beads, Donghai Agate, Chalcedony, Jadeite, and Madagascar Pink Crystal for DIY Jewelry Making

Loose Rose Quartz Beads, Donghai Agate, Chalcedony, Jadeite, and Madagascar Pink Crystal for DIY Jewelry Making

$6.72

Expandable Stainless Steel Sink Rack, Multi-Function Kitchen Drain Board for Fruits, Vegetables, and Utensils

Expandable Stainless Steel Sink Rack, Multi-Function Kitchen Drain Board for Fruits, Vegetables, and Utensils

$14.90

Transparent Retainer Case Aligner Storage Box Portable Carry-On Squeeze Bag Orthodontic Appliance Rubber Band Cleaning Box

Transparent Retainer Case Aligner Storage Box Portable Carry-On Squeeze Bag Orthodontic Appliance Rubber Band Cleaning Box

$18.50

Transparent Data Cable Organizer Bag for Travel - Portable Multi-Use Visible Storage for Digital Chargers and Cable Management

Transparent Data Cable Organizer Bag for Travel - Portable Multi-Use Visible Storage for Digital Chargers and Cable Management

$7.36

Finished Seal Calligraphy Finished Stone Stamp Sellos Chines

Finished Seal Calligraphy Finished Stone Stamp Sellos Chines

$108.58

Chunfei Grocery Store Commuter Hard Fork Low-Beam Mountain Bike for Urban Roads, Suburbs, School, and Outings

Chunfei Grocery Store Commuter Hard Fork Low-Beam Mountain Bike for Urban Roads, Suburbs, School, and Outings

$2,247.00

6-Cavity Large Square French Flower DIY Soap Silicone Mold for Essential Oil and Milk Soap

6-Cavity Large Square French Flower DIY Soap Silicone Mold for Essential Oil and Milk Soap

$4.93

Home Balcony Vegetable Planter - Self-Watering Plastic Pot for Strawberries and Succulents

Home Balcony Vegetable Planter - Self-Watering Plastic Pot for Strawberries and Succulents

$28.00

Pressure Swing Adsorption Nitrogen Generator - High-Purity Nitrogen Device for Heat Treatment

Pressure Swing Adsorption Nitrogen Generator - High-Purity Nitrogen Device for Heat Treatment

$36,456.00

6-Cavity 3D Rose Silicone Mold for DIY Soap Making Heat-Resistant Non-Stick Large Size for Milk Soap and Essential Oil Soap

6-Cavity 3D Rose Silicone Mold for DIY Soap Making Heat-Resistant Non-Stick Large Size for Milk Soap and Essential Oil Soap

$5.80

Traditional Handmade Baby Teething Rattle Sheepskin Wooden Clapper Newborn Toy Intangible Cultural Heritage

Traditional Handmade Baby Teething Rattle Sheepskin Wooden Clapper Newborn Toy Intangible Cultural Heritage

$29.85

Manufacturer Supply ZSJC02 Film Splicing Table, Alignment Table, Film Inspection Table

Manufacturer Supply ZSJC02 Film Splicing Table, Alignment Table, Film Inspection Table

$4,484.00

Box-Type Oxygen Generator Export Equipment - Stable Nitrogen and Oxygen Production for Wastewater Treatment

Box-Type Oxygen Generator Export Equipment - Stable Nitrogen and Oxygen Production for Wastewater Treatment

$25,000.00