KIMAX 2 Radio air 3

Onboard weighing truck scale

Radio Set includes:

Kimax 2 radio 1 + 1×2 air
Part number 031200-0131
1 x display unit, cabin
1 x mounting frame + connection cable
3 x angle fittings
3 x air pressure throttle dia. 6mm
3 x T-fitting dia. Ø 8mm / 6mm / 8mm


Kimax 2 radio display and Kimax 2 sensor 1 + 1×2 air
Part number 030000-0140
1 x display unit, cabin
1 x mounting frame + connection cable
Part number 051200-01B1
3x angle fittings
3 x air pressure throttle dia. 6mm
3x T-fitting dia. Ø 8mm / 6mm / 8mm

  • Current Gross weight for the entire vehicle *
  • Gross weight per tractor/trailer *
  • Current load on all individual axles
  • Payload for the entire vehicle *
  • Payload per tractor/trailer *
  • Alarm for overload on individual axles
  • Alarm for Gross weight
  • All weights are displayed in tonnes

Kimax 2 radio fits your DIN slots

and offer you a load control of you vehicle, either as a solo instrument including build in air sensors or as a display unit which needs contact to one or more Kimax 2 Sensors through the power line device bus, which can act on the existing electrical system on your vehicle.

  • Kimax 2 calculates the current loads from the current air pressure in the suspension system and displays this figure as a three-digit value.
  • The Kimax 2 On-Board Load Control is an electronic weighing system which can be used in all vehicles whose axles or axle groups are equipped either with air suspension system or steel spring suspension system.
  • Due to the modular construction, the product is very flexible and can be individually adapted to most vehicle conditions.

… and warns when limits are exceeded

Kimax 2 has two separately adjustable alarm levels. Exceeding alarm level 1 is indicated by a flashing diode for the individual axle which has exceeded its limit.
Alarm 2 switches in an internal electronic “relay” when the total weight for the vehicle is exceeded. The relay signal can be used as ON/OFF input for another unit, for example a tracking GPS or a tachograph.
Kimax 2 helps to achieve economical transportation, avoids fines and simultaneously optimizes the cargo weight.


* Tractor/trailer readings call for a Kimax 2 radio installed in the truck and a Kimax 2 sensor installed on the trailer.

Axle load measurement

Kimax 2 uses the linearity between air pressure and load of the single axles.
By using two reference points for each axle (empty weight and weight at maximum load) and the currently measured air pressure, Kimax 2 calculates the current axle load with an accuracy of 2 % of the maximum load for each axle.

Basic operation

Depending on load of the vehicle, the level valve maintains a constant height of the chassis above ground surface by regulating the pressure in the air bellows.

Kimax 1 air suspended front axle

Front axle works typical with a single air circuit, the rear axle works typically with a dual air circuit

Trailer axle suspension for Kimax

2/3-axle – less expensive axle load system for best accuracy

Air tubes are routed into the cabin
1 air sensor for the front axle and 2 air sensors for rear axle offer you the best accuracy. The influence of inclination or slightly uphill/downhill standing is partly compensated in this configuration, as well as weighing accuracy is unaffected on the distribution of goods loaded on the vehicle.

3-axle – easiest to install axle load meter for best accuracy

No air tubes inside the cabin
1 air sensor for the front axle and 2 air sensors for rear axle are connected to Kimax sensor box on the chassis. Sensor box communicate weight data with Kimax display inside the cabin.

Air circuits and sensors

On all vehicles you get optimal accuracy with two independent air inlets for
each axle, one for each pneumatic circuits (right and left) per axle or axle
group on air suspended axles, Kimax 2 calculates the current axle load on
each axle from two reference values LO and HI.


• When less accuracy is enough for you, one air inlet on each axle or axle
group is available too.

Optional versions:

Kimax 2 is exactly as flexible as your vehicle:

Do you have a tractor equipped with air suspension on both front axles
and rear axles combined with a lift axle? No problem!

Do you have a truck with 2 front axles equipped with steel springs and
two rear axles divided in left hand and right hand air circuits? No

Do you want to couple a trailer or semitrailer on the above vehicles?
No problem!

Do you want to couple a low bed trailer equipped with hydraulic
suspension on a tractor equipped with air suspension? No problem!

Do you want to swap from one trailer to another trailer? No problem!
– Individual calibration values are stored in the Kimax unit on each

Technical Specifications


Supply voltage 10 – 30 V direct current
Current consumption max 90 mA 
Alarm 1 Flashing display
Alarm 2 output open collector NPN max 0.2A/ 50 VDC
Display Three-digits 7-segment LED character height 20.3 mm
Accuracy 2% of maximum load at 0 °C – +50 °C
Air connection quick release, 6 mm hose
Maximum pressure 15,5 bar (225 psi)
Operating pressure range 0-10,5 bar (0-150 psi)
On-board computer RS-232 serial
Printer RS-232 serial
Device bu Power line communication
Operating temperature -25°C to +70°C
Storage temperature -40°C to +70°C
Dimensions 182 x 53 x 75 mm
Weight approx. 550 g
Protective class IP60
Approval CE and E1


Kimax 1 and Kimax 2 are a series of high quality well proven on-board scales for use on trucks, buses and loading equipment. For detailed product selection guide please go to Kimax.com. Kimax 1 and Kimax 2 are registered trademarks owned by Sense-Tech Weighing Systems.

Sense-Tech Weighing Systems are used all over the world. From the hectic harbours of Amsterdam to the dusty outback of Australia. And everywhere in between.

Other Kimax products you might want to explore

Kimax 2 radio 4-axle

Kimax 2 radio 5-axle

Kimax 2 radio mixed suspension

Kimax 2 sensor air inputs

Sense-Tech Weighing Systems ApS
Bygade 43A
DK-7173 Vonge

Monday – Thursday: 8:00 – 16:00 CET
Friday: 8:00 – 14:00 CET