Hense Wägetechnik GmbH
About us
Hense Wägetechnik offers individual weighing solutions in the field of bulk material storage and transportation.
We engineer silo weighing systems for vessels from 50 kg up to 1,000 t. Alternative we can retrofit existing silos with a reliable weighing system based on strain gauge sensors.
We are also specialized in solid flow measurement. Our product range includes weigh-feeders, belt scales, optical belt scales and precise mass flow measuring instruments for gravimetric and pneumatic conveying systems.
Advisory services on-site, quick reaction and process know how is our strongness to support our customers.
Products
Load cells
Hense Wägetechnik offers precise load cells for tanks, silos and mixer. The unique design of the loading assembly offers safe, precise and simple weighing for vessels from 50kg to 1000t. The force guiding guarantees high resistance against lateral forces and thermal expansion. Totally stainless steel module is also available.The Load cells are very easy to install -the build in rod- and stay bar security is not sensitive against horizontal forces and thermal expansion of the vessel. All modules are available as OIML and ATEX approved version. The 50 and 60t load cells are static approved by the TÜV Darmstadt.
Flow meter for bulk materials - FlowSlide
FlowSlide - precise mass flow meter The FlowSlide measurement system allows you to measure all free-flowing, solids precisely and free of maintenance. The device measures the flow rate of solids in „free fall“ by means of the centrifugal force. This force is directly proportional to the mass. The measuring range of the different FlowSlide sizes starts at 30 kg/h and ends at 300 t/h. In the FlowSlide the product to be measured is guided over a circular slide. This generates a centripetal force, which is directly proportional to the mass flow (kg/h). Due to the specific force transmission, the influence of the frictional forces is cancelled out along the measurement slide. The measurement is largely independent of the product density, grain size and elasticity.
Belt Scales
The BW 10 belt-weigher consists of a robust angle steel frame; The shallow, modular construction of this allows it to be integrated into nearly every existing conveyor belt system. The accurate readings recorder is protected by a mechanical overload limit stop from shock loads. Because of the special force periodic maintenance is not required. Hense Wägetechnik offers individual belt scales for nearly all kind of applications. The flow of extracted material exercises a pressure load on the rolling cradle. This is picked up by the weighing frame and conducted into a high-precision load cell. A converter strengthens the signal on-site and transmits over distances of up to 600 m to the electronic control unit. This standardises the weight signal and links it with the flow speed, which is detected by a robust odometer. The electronic control simultaneously displays the flow rate (t/h) and the absolute quantity. There are 4 counters and various outputs available.
Microwave FlowMeter for pneumatic and gravimetric solid flow measurement
MIC FlowMeter The MIC Microwave Measuring System consists of a sensor head with stainless steel pipe and an evaluation electronic control unit. To mount the equipment a hole for the integral brackets is first drilled in the conduit. The sensor is installed flush with the wall and therefore is wear-free.
Strain Gauges for silo weighing (retrofit able)
Type 'Microcell' DMS Sensor With fine, powdered products, therefore, it is often difficult, to get a reliable inventory information with level gauges. In new plants it is recommended that you set the silos on load cells - but what about existing production and storage silos? Hense Wägetechnik GmbH offers a safe and reliable retrofit- solution" based on strain gauge sensors. The temperature compensated sensors are directly bolted to the support member of the silo ( leg or skirts ...). The sensors measure the deflection caused by loading or unloading the silo and converts this into a proportional voltage signal. The instrumentation amplifies and display the signal directly in tons or kg. The result is a maintenance free inventory measurement based on weight.
FlowSlide ECO
The new FlowSlide ECO uses the same measuring principle as the high-precision flow measurment System FlowSlide. The FlowSlide has been a core product of Hense Wägetechnik for many years. The FlowSlide ECO is a more economical alternative, for example for the agricultural division. Both the FlowSlide ECO and the FlowSlide are suitable for nearly all flowable and non-sticky bulk materials. Both systems continuously measure the current mass flow in kg/h or t/h and the absolute quantity in kg or t. The System uses the centripetal force to calculate the mass flow therefore the Ssystem is - contrary to e.g. Impact scales - almost not influenced by changes in density or other material characteristics. The housing of the FlowSlide ECO is not made of solid aluminum plates like the FlowSlide but is made of machined mild steel or stainless steel plates. This allows a more economical design and construction with almost identical accuracy. Due to the optional design in stainless steel, the device is in many cases also suitable for the measurement of food. The FlowSlide ECO can be operated with differentamplifiers in order to keep the system flexible and to tailor it to the wishes of the customer.
Weighing Screw Conveyor with automatic calibration cycle
Weighing screw conveyor with automatic calibration. Weighing screw conveyor perform a dual function – they transport the bulk material from A to B and measure the throughput (t / h) and the absolute quantity delivered (t) simultaneously. Especially for fine and dusty products, such as white lime, hydrated lime, cement and starch a weighing screw conveyor provides the advantage of dust-free conveying. Due to the dual function (conveying and weighing) this results in an economical solution compared to conventional weight feeders and solids flow - measuring instruments. Requirements for the use of weighing screw conveyors: 1. To ensure optimum transport of the bulk material in conjunction with a precise weighing, the inlet- and the outlet connection must be fully decoupled. The input feed should be controlled via a rotary valve or a second screw conveyor. 2. The screw should only be filled to maximum 40% of the conveying capacity -otherwise a part of the conveyed product is thrown over and double-weighted. 3. Evt. Caking in the conveyor tube or on the screw flights should be zeroed periodically. Especially the third point can often not be realized in practice. Screw conveyor often dose additives (eg. hydrated lime in the flue gas desulfurization) and are in operation 24 hours arround the clock. In order to still be able to use the serious advantages of weighing screw conveyor, Hense Wägetechnik has developed a concept for automatic "self-calibration" in continuous operation. Functionality: The weighing screw is feed via a small hopper with a rotary valve in the discharge. The hopper is mounted on 4 precise "Clevermount" - weighing modules. The static hopper weighing system and the “weighted screw conveyor are connected to the same evaluation electronic. The “self calibration cycle” can be started periodically (over a programmable time) or externally from the PLS system. In the first step the hopper is filled to an adjustable weight. This value can be preselected in the evaluation electronic. The weighing electronics transmits a signal "start calibration cycle" to the parent PLS system. The filling of the hopper is stopped during the calibration. After a short settling time, the electronics stores the container weight (kg) and the state of the totalizer (kg). The electronic system now “waits” until the weight of the product in the hopper is reduced by an adjustable value (eg. 100 kg). Now the electronics compares the reference quantity (eg. 100 kg) withdrawn from the hopper to the counter of the weighing screw - on exceeding a defined fault tolerance, the system performs an automatic correction calibration. Furthermore, all data is logged in a log table and optionally set a tolerance alarm.