The KDH Weigh Module

COST-EFFECTIVE, HIGH-CAPACITY PROCESS WEIGHING FROM 20 KN TO 200 TONS

When you need to weigh silos, tanks, containers, or weighbridges reliably — without overengineering the solution — the challenge is finding a weigh module that combines high capacity, proven accuracy, and easy installation at a cost-effective price point. Thermal expansion, side loads, wind, and seismic forces all threaten measurement integrity, while explosive atmospheres and corrosive environments demand certified, sealed hardware.

BLH Nobel’s KDH weigh modules are the workhorse of industrial process weighing. Built around a double-ended shear beam transducer with a floating load point, the KDH series handles thermal expansion and side loads by design — not by adding complexity. Available in three configurations — KDH-1, KDH-3, and KDH-5 — with capacities from 20 kN to 2,000 kN (200 tons), and with FM, ATEX, and IECEx certification, the KDH delivers dependable performance for level monitoring, process weighing, and inventory control in the most demanding industrial environments.

• Double-ended shear beam transducer Industry need: Accurate measurement despite dynamic process forces. The cylindrical shear beam sensing element is highly resistant to measurement errors caused by process dynamics, side loads, and vibration. Three sections: two outer supports resting in the built-in block, and a middle load sensing section with a yoke for vessel attachment.

• Floating load point Industry need: Stable weighing through temperature cycles without mechanical constraints. Allows radial horizontal movement due to thermal expansion and contraction of the vessel. No stay rods or additional check hardware needed for most applications.

• Capacity range 20 kN to 2,000 kN Industry need: One weigh module family across the full capacity range. Covering applications from mid-size mixers and hoppers to heavy silos, containers, and weighbridges up to 200 tons.

• FM, ATEX, and IECEx certified Industry need: Safe, compliant operation in hazardous environments. Approved for use in explosive atmospheres across global markets. All KDH models available with hazardous area certification for chemical, pharmaceutical, oil & gas, and mining environments.

• Compact and robust mechanical design Industry need: Fast, simple installation with minimal engineering effort. The integrated tilt guard eliminates the need for extra mounting supplements. The sensor is efficiently locked so it cannot twist in the built-in block — and can be easily removed for dummy installation during vessel assembly.

• Seismic and wind resistant (KDH-3) Industry need: Structural safety in regions with earthquake or high-wind exposure. Self-checking mounting hardware designed to meet both ANSI and ASCE structural requirements for wind and seismic applications, while allowing for vessel thermal expansion and contraction.

• Hardened stainless steel construction (KDH-3) Industry need: Hygiene and corrosion resistance in regulated industries. Both beam transducer and mounting hardware constructed entirely of hardened stainless steel. Electropolished hardware and IP67-sealed beam for sanitary and corrosive process environments.

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• IP68 and IP69K sealing available Industry need: Long-term reliability without moisture-related failures. Full protection against ingress for wash-down areas, outdoor installations, and submersion.

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• Easy installation and retrofit Industry need: Adding weighing capability without redesigning the vessel. The modular design makes it straightforward to retrofit existing structures, turning tanks, hoppers, and containers into weighing systems with minimal modification.

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• Compatible with BLH Nobel instruments and junction boxes Industry need: Integrated, single-source system for simpler procurement and support. Pairs with the G5 process instrument, WIN5 weight indicator, and CGS4-C ATEX junction box for a complete weighing system from a single supplier.

Silo & Tank Weighing

Silos and large storage tanks are core KDH territory. The floating load point absorbs thermal expansion without check rods or mechanical constraints, while the double-ended shear beam rejects side loads from piping, wind, and structural deflection. KDH-5 modules in capacities up to 200 tons handle the heaviest industrial vessels — from chemical storage to grain silos to raw material tanks — delivering accurate process weighing and level monitoring data for inventory control and process feeding.

Container & Weighbridge Weighing

The KDH-5’s compact design and high capacity make it ideal for container weighing and industrial weighbridges. Easy installation and the ability to retrofit existing structures mean you can add verified weighing capability to your logistics chain without major civil works.

Hopper & Mixer Weighing

Hoppers and mixers present dynamic forces from material flow, agitation, and impact loading. The KDH’s shear beam transducer resists these process dynamics, delivering stable weight data for batch control, recipe management, and level monitoring — even during filling and discharge.

Hazardous Area Applications

With FM, ATEX, and IECEx certification across the KDH range, these weigh modules operate safely in explosive atmospheres found in oil & gas, chemical plants, pharmaceutical production, and mining. Paired with the CGS4-C ATEX junction box, the KDH delivers a fully certified weighing system for Zone 1 and Zone 2 environments.

Food, Pharmaceutical & Chemical Processing

The KDH-3’s electropolished stainless steel construction and IP67 sealing meet the hygiene and corrosion resistance standards demanded by food and pharmaceutical manufacturers. The self-checking mounting hardware also satisfies ANSI/ASCE structural codes, providing both process integrity and regulatory confidence.