Load cells PR 6221

The PR 6221 load cell has been specially designed for use in truck scales and can be upgraded to a digital solution.

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Analog and digital

Also available as digital solution with Converter Connexx

Precise measurement results

thanks to special measuring element geometry

Extremely resistant

for even the harshest environmental conditions

German Quality

ensures maximum reliability and lightning protection

Product details Truck scale load cell PR 6221

The PR 6221 load cell is manufactured and produced in Germany with the utmost care. Its high quality guarantees precise results. The high quality of the PR 6221 load cell guarantees precise results, a long service life and lowers costs in the medium term. Their outstanding precision and durability reduce service and calibration costs and help keep downtime to a minimum. In combination with the Connexx® converter, the PR 6221 becomes a digital solution. Developed for the toughest environmental conditions the load cell can withstand even a water immersion of 1.5 m depth and more than 10,000 hours duration. Matching installation kits and cable boxes complete the range.


  • Fill quantity control
  • Filling and Dosing
  • Weighing


  • ATEX
  • FM
  • IEC-EX
  • NTEP
  • OIML


Product type

Product handling

Only in combination with suitable vehicle scale components

IP protection class

PR 6221: IP 68 / IP 69
Connexx: IP 65 / IP 68


Housing: 1.4301 (DIN EN 10088-3)

Converter Connexx

Fitted with the converter Connexx®, the load cell PR 6221 offers a comprehensive raft of possibilities:

  • The digital version guarantees fast signalling times
  • Thanks to the use of field bus communication, the cable junction box is no longer needed
  • CANopen allows for extra-long communication paths of up to 200 m
  • Weight values individually available for each load cell facilitate quick commissioning and make it easier to identify defective load cells

High restoring force

When driving onto the truck scale, the forces applied result in a deflection of the load cell. The restoring force ensures that the load cell returns to its centred rest position as quickly as possible.

Maximum lightning protection

The truck scale load cells PR 6221 meet all requirements.

  • Lightning surge current (Imax = 100 kA) 10 µs/350 µs (lightning protection class III) as per DIN EN 62475
  • Lightning surge voltage (Umax = 1,000 kV) 1.2 µs/50 µs as per DIN EN/IEC 60060-1

Using proper surge protection, potential equalisation, protection of the measuring cable and in conjunction with Minebea Intec junction boxes and indicators, the analogue load cells can withstand voltages of at least 1,000 kV and currents of up to 100 kA without damage.

Time savings with matched output

The output impedance (Ro ) and parameter (Cn ) of the load cells are within a tight tolerance range (= matched output) both individually and together. This means that there may possibly be no need for electrical corner correction and only mechanical height adjustment will be required.

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Best Practice

  • Key facts
  • Challenge
  • Solution
  • Customer
Download Best Practice

Endurance test in the quarry A truck scale, as solid as a rock - with load cells from Minebea Intec

Key facts

Stevin Rock is the leading quarrying operator in the Middle East, focusing on limestone, gabbro rock, concrete and asphalt aggregates from three quarries, supporting mainly the construction and real-estate sector in the region. At Stevin Rock’s quarry in Fujairah, trucks are loaded with 110 tonnes of rocks in 400 single weighing operations per day.

More about the challenge


The “Stevin Rock” quarry in the United Arab Emirate of Fujairah highlights an environment that is an acid test for a truck scale. Temperatures range from 15 to 55 °C during the year, with trucks loaded with up to 110 tonnes of rocks. The frequency of 400 single weighing operations per day, seven days a week, demands the utmost of the installed equipment involved in quarrying and weighing the limestone, gabbro rock, concrete and asphalt aggregates.

More about the solution


To meet the high requirements, Danway Emirates installed a truck scale with Minebea Intec components at Stevin Rock in 2015. The PR 6221 analogue load cell guarantees precise measurement results and is characterised by durability and exceptional reliability - even under the extreme environmental conditions of the emirate of Fujairah.


More about the customer


Stevin Rock was founded in 1975 as a 100% owned subsidiary of the Dutch civil engineering company Volker Stevin. Over the years, it has focused more and more on producing large-sized rocks typically used in breakwater application. In 2007 it merged with Ras Al Khaimah Rock Company (RAK Rock), becoming one of the largest quarrying companies in the world.

Industrial solutions Our products for your production processes

Our systems and services are oriented towards the requirements of our customers from a wide range of industries. In this way, we ensure that with Minebea Intec you can design your production processes safely and efficiently without having to make compromises. This starts with individual product features and stops only after exceeding global standards.

  • Chemical
  • Cosmetics
  • Food & Beverage
  • Machinery / OEM
  • Pharmaceutical
  • Confectionery
  • Dairy
  • Plastics
  • Building Materials
  • Agriculture
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Minebea Intec offers innovative and robust weighing technologies for the chemical industry.

Our solutions for chemical industry


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Our solutions for cosmetics industry

Food & Beverage

Minebea Intec is a leading supplier of weighing technologies to the food and beverage production industry. Armed with a deep understanding of the challenges food and drink manufacturers face, the company has developed a range of products and solutions that are perfectly tailored to meet their needs in relation to quality and food/drink safety, while also enhancing efficiency and protecting production equipment.

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Machinery / OEM

Process integrators and machine manufacturers in various industry sectors can benefit from the precision, hygienic design, corrosion resistance and ingress protection offered by Minebea Intec equipment. A wide product range is available.

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Minebea Intec has decades of experience in providing high quality technologies to pharmaceutical manufacturers around the world.

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Our technologies ensure reliable processes in the confectionery industry along the production and packaging line. However, product safety and quality are only one side of the coin.

Our solutions for confectionery industry


Minebea Intec offers high quality industrial weighing solutions for the dairy processing industry.

Our solutions for dairy industry


Minebea Intec products ensure highly precise and reliable measurement results for plastics processing.

Our solutions for plastics industry

Building Materials

For the weighing of building materials, the Minebea Intec portfolio offers the appropriate robustness, durability and IP protection class. Robust dosing and filling equipment is also supplied.

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The processes in the agricultural industry require robust, reliable solutions with safe measurement results. Minebea Intec’s extensive range of weighing products, both automated and manual, has a high-quality solution for every need.

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