Best Onboard Scales For Trucks: Compare 8 Scale Types

#1 · Best Overall

1. Blue Ink Tech BIT Air Scale

• Weight: 6 oz
• Material: Metal, Plastic
• Material Type: Metal, Plastic

Best for: Connected truck-and-trailer monitoring.

Why it ranks #1: Its dedicated truck-and-trailer system shares total truck, cargo, and individual axle readings through an app using low-energy Bluetooth.

Bluetooth sharing with the Blue Ink Tech app puts total truck weight, cargo load, and individual axle readings on your phone. That combination gives drivers a way to check several load measures in real time, while the included truck and trailer sensors make this a dedicated multi-part setup rather than a single-axle gauge.

T-fittings connect directly to existing air-suspension lines, and the kit includes both 3/8-inch and 1/4-inch options for the drive axle. The supplied details say 99% of trailers take the 3/8-inch fitting on the Extended Air Scale, giving many setups a specified starting point for installation. Low-energy Bluetooth sends readings to the app, so drivers can monitor truck, cargo, and axle weights from a phone instead of relying on an in-cab gauge.

Skip it if you want a standalone in-cab touchscreen; Right Weigh 202-DDG-02 provides a color touchscreen LCD and Bluetooth.

Choose this Blue Ink Tech kit if you want phone-based, real-time monitoring across truck, cargo, and individual axles. Its sensor-and-fitting setup suits dedicated truck and trailer installations; check the included fitting options against your air-line arrangement.

Listed on Amazon as: BIT Air Scale 18-Wheeler Set – Bluetooth-Enabled Onboard Load Scale for Dedicated Trucks and Trailers

#2 · Best Bluetooth Display

2. Right Weigh 202-DDG-02

• Weight: 9.7 oz

Best for: Cab touchscreen for dual HCV setups.

Why it ranks #2: Two air-pressure sensors support a tractor-trailer set with two height control valves, and its cab touchscreen displays axle-group weight.

A color touchscreen LCD displays on-the-ground axle-group weight in pounds or kilograms, giving cab-based users a direct readout without a separate phone interface. The 202-DDG-02 uses two air-pressure sensors to monitor one dual-height-control-valve axle group or a dedicated tractor-and-trailer set with two height control valves.

Bluetooth capabilities accompany the in-dash display, and the gauge is described for cab mounting in air-suspension tractors or straight trucks. Two sensors cover the stated dual-HCV group or dedicated tractor/trailer arrangement, helping match the system to those configurations. Estimated steer weight is available when installed on a drive axle group. Empty and loaded calibration at a certified ground scale is required before the displayed axle-group readings are ready for use.

Skip it if you need an exterior readout for one HCV group; Right Weigh 201-EBT-01B has a weather-resistant exterior digital display.

This suits drivers who want a Bluetooth-capable touchscreen in an air-suspension tractor or straight truck, especially with the stated two-HCV configurations. Plan for certified-ground-scale calibration, and match the sensor setup to the axle groups being monitored.

Listed on Amazon as: Right Weigh 202-DDG-02 Bluetooth-Enabled Interior Digital Load Scale – for Air Suspension Tractors, Straight Trucks, andor Tractor-Trailer Dedecated Sets (2 Air Sensor (2 Height Control Valves))

#3 · Best Digital Exterior

3. Right Weigh 201-EBT-01B

• Weight: 5 lb

Best for: Exterior digital single-HCV scale.

Why it ranks #3: A weather-resistant exterior digital display monitors one drive or trailer axle group with a single height control valve.

A digital display presents on-the-ground axle-group weight in pounds inside a weather-resistant exterior enclosure, giving single-height-control-valve users a direct outdoor readout. The Right Weigh 201-EBT-01B uses one air-pressure sensor for either one drive axle group or one trailer axle group with a single HCV.

The supplied bracket and stainless mounting hardware support exterior installation, while the enclosure is specified as weather resistant. A programmable five-digit PIN code adds an access-control option for the gauge. To obtain the stated reliable axle-group reading, both empty and loaded calibration must be performed at a certified ground scale. The one-sensor configuration is specifically for a single drive or trailer group with one height control valve, so it suits that defined setup rather than a two-group arrangement.

Skip it if you need one system for a dedicated tractor-and-trailer set with two HCVs; Right Weigh 202-DDG-02 uses two air-pressure sensors for that arrangement.

This suits operators who want an exterior digital reading for one drive or trailer axle group with a single height control valve. Allow for empty and loaded certified-scale calibration, and keep its one-group sensor scope in mind.

Listed on Amazon as: Right Weigh 201-EBT-01B Exterior Digital Axle Load Scale – for Single Height Control Valve Air Suspensions

#4 · Best Mechanical Kit

4. Right Weigh 310-54-RK

• Weight: 4.8 lb
• Material: Metal
• Material Type: Metal

Best for: Weather-protected tandem axle gauge.

Why it ranks #4: The tandem-axle kit includes 30 feet of air line, fittings, mounting hardware, and a weather-resistant 31⁄2-inch gauge enclosure.

A 31⁄2-inch mechanical gauge displays tandem axle-group weight in pounds, giving drivers a large-format readout without a digital display. The kit is intended for tandem drive or trailer air suspensions with one height control valve, and includes 30 feet of air line plus the fittings needed to connect to an air bag.

The weather-resistant enclosure and push/pull air valve protect the gauge and provide a physical control at the installation. Included bracket and stainless mounting hardware support mounting, while the 30-foot air line gives the kit a stated length for routing between the suspension connection and gauge. After loaded calibration at a certified ground scale, the gauge displays on-the-ground axle-group weight in pounds for the specified tandem, one-HCV arrangement.

Skip it if you need an in-cab gauge that fits a standard 2-1/16-inch dash cutout; Right Weigh 510 Series 510-46-RK is an interior analog kit.

Pick this kit for a tandem drive or trailer suspension with one height control valve when an exterior mechanical readout and included air-line hardware suit the installation. It requires loaded calibration at a certified ground scale and reports pounds.

Listed on Amazon as: Right Weigh 310-54-RK Onboard Load Scale Kit for Tandem Axle Air Suspensions

#5 · Best Temperature Range

5. Right Weigh 310 Series

• Material: Polypropylene
• Material Type: Polypropylene

Best for: Exterior tandem analog monitoring.

Why it ranks #5: Its exterior tandem-axle gauge has a stated operating range of -40°F to 140°F and includes a bracket and mounting hardware.

A 31⁄2-inch exterior analog gauge displays tandem axle-group weight in pounds, making the readout suited to users who want a larger mechanical display outside the cab. The 310 Series is for air suspensions with one height control valve and includes a weather-resistant enclosure, bracket, and mounting hardware.

The weather-resistant enclosure and push/pull air valve protect the gauge, while the included bracket and stainless mounting hardware support exterior installation. Its stated operating range of -40°F to 140°F gives buyers a defined temperature boundary for use. After loaded calibration at a certified ground scale, it displays the on-the-ground weight for a tandem drive or trailer axle group; the included 1/4-inch tube fitting supports the air-line connection.

Skip it if you want an in-cab digital screen for a single HCV group; Right Weigh 201-EBT-01B offers an exterior digital display and one pressure sensor.

Choose this for a tandem drive or trailer air suspension with one height control valve when an exterior analog gauge suits the installation. Its temperature range is specified, and the weight readout requires loaded calibration at a certified ground scale.

Listed on Amazon as: 310 Series Exterior Analog Axle Load Scale for Air Suspensions (Tandem Axle, 1 HCV – Standard)

#6

6. Right Weigh 510-46-RK

Best for: Interior analog kit with 46,000-pound limit.

Why it ranks #6: This interior analog kit is designed for a tandem drive suspension with one height control valve and lists a 46,000-pound capacity.

A stated 46,000-pound capacity distinguishes this tandem axle kit, which displays on-the-ground axle-group weight in pounds on an interior analog gauge. The 510-46-RK is intended for a single-height-control-valve air suspension and includes the air line and fittings needed for its listed setup.

The included air-line installation kit combines the gauge, line, and fittings for one height control valve, giving buyers the main connection components in one package. Its seven-color LED backlight can be changed with a button on the gauge front, so users can select among white, red, green, yellow, blue, purple, and teal. After loaded calibration at a certified ground scale, the analog gauge displays axle-group weight in pounds, subject to its stated 46,000-pound limit.

Skip it if you need a tandem axle scale above 46,000 pounds; Right Weigh 310 Series 310-54-RK lists no weight capacity in the supplied details.

Choose this interior analog kit for a tandem drive suspension with one height control valve when its 46,000-pound capacity covers the intended axle-group monitoring. It includes air-line fittings, but requires loaded calibration at a certified ground scale.

Listed on Amazon as: Right Weigh 510-46-RK Tandem Axle Load Scale Kit for Single HCV Air Suspension (Chrome Bezel)

#7

7. Right Weigh 510 Series

• Weight: 2 lb
• Material: Glass, Metal, Plastic
• Material Type: Glass, Metal, Plastic

Best for: Interior tandem analog gauge.

Why it ranks #7: The interior 2-inch analog gauge fits a standard 2-1/16-inch dash cutout and offers seven selectable LED backlight colors.

A 2-inch analog gauge fits a standard 2-1/16-inch dash cutout and displays tandem axle-group weight in pounds, giving drivers an in-cab readout in a specified opening. The 510 Series is intended for tandem air suspensions with one height control valve and offers a choice of seven LED backlight colors.

The standard dash-cutout fit gives installers a defined opening requirement, while the interior gauge keeps the axle-group reading in the cab. Its simple installation and calibration process supports setup, but a loaded calibration at a certified ground scale is needed for the stated on-the-ground reading. The 1/4-inch air-line fitting is included, and the selectable backlight colors let users choose a display appearance without changing the gauge’s pounds-only weight reporting.

Skip it if you need an exterior weather-resistant gauge; Right Weigh 310 Series 310-54-RK includes an exterior enclosure and mounting hardware.

This fits a driver seeking an interior analog readout for a tandem axle suspension with one height control valve and the stated dash opening. Account for loaded calibration at a certified ground scale and its pounds-only display.

Listed on Amazon as: 510 Series Interior Analog Onboard Load Scale – for Tandem Axle Air Suspensions with One Height Control Valve – 7 Color LED (Black Bezel)

#8

8. MEASUREMAN Air Pressure Kit

• Weight: 2.7 lb
• Material: Brass
• Material Type: Brass

Best for: Brass pressure-monitoring kit.

Why it ranks #8: It is a brass air-pressure gauge kit for monitoring suspension air bags, but the listing does not specify axle-weight display or calibration.

A brass air-pressure gauge kit provides a way to monitor pressure in each suspension air bag, helping truck operators assess load distribution through the suspension. MEASUREMAN describes it as a complete kit for semi-truck and trailer onboard load-scale applications, with straightforward installation intended for various suspension systems.

The kit’s air-pressure readings give users information for monitoring and adjusting suspension pressure, which the supplied description connects to load distribution. Its brass construction is specified for the kit, and the product is presented for semi-truck and trailer suspension applications. The supplied details do not identify a digital display, phone connection, or a stated on-the-ground weight readout, so buyers should distinguish this pressure-gauge approach from products that explicitly display axle-group weight.

Skip it if you need a stated axle-weight readout; Right Weigh 310 Series 310-54-RK displays tandem axle-group weight in pounds.

Consider this MEASUREMAN kit if your priority is monitoring suspension air pressure to assess load distribution on a semi-truck or trailer. Its listed function is pressure measurement; choose a scale with an explicit weight display if you need axle-group pounds.

Listed on Amazon as: MEASUREMAN Air Pressure Gauge Kit for Semi Truck Trailer Suspension, Onboard Load Scales