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Load-cells

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Load-cells with semiconductor strain gauges

We produce load-cells according to customer requirements.

Our load-cells are suitable for measuring forces, mass, pressure, torque, acceleration
Accuracy of load-cells (non-linearity + hysteresis) with semiconductor strain gauges is the guaranteed to ± 0.5% of the nominal range or better
Safe overload of our load-cells is to 200% nominal range
We can use foil strain gauges from other company in load-cells

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Typical chatacteristics of our load-cells

Load-cells with steel-foil strain gauges

We also produce load-cells with steel-foil strain gauges, which we buy from the world manufacturers.
Compared with load-cell with semiconductor strain gauges, load-cell with steel-foil strain gauges have:

lower output signal (sensitivity up to 4 mV/V)
lower temperature coeficient of deformation sensitivity
lower combined error ( hysteresis and nonlinearity)
lower safe overload
temperature self-compensation

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The basic specification of load-cell with steel-foil strain gauges:
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Basic principles

FORCE AND MASS

0.1 g – 200 kg

1 kg – 5 000 kg

500 kg – 500 t

ACCELERATION

10-5 m/s2 – 100 m/ s2

PRESSURE

0.01 MPa – 5 MPa

5 Mpa – 100 MPa

TORQUE

0.01 N.m – 100 N.m

Depiction od deformation under load

Use in practice

Turbo-prop engine M-602

Crankshaft of Škoda 120 engine

Abdominal tocometrical transducer

Medical injection pump IPB 2050

maintain correct depth tillage

check and control laboratory and manufactoring processes

	UNIT	VALUE
Input current	mA	from 10 to 30
Rated unloaded signal (the difference between output signal of 100% loaded and free sensor) at power Iin=10mA	mV	50 ± 0.2
Output signal of free sensor at power Iin=10mA	mV	0 ± 0.2
Output signal of loaded sensor at the nominal value at input current 10mA	mV	50 ± 0.2
Combining error (non-linearity + hysteresis) – in % of the nominal range sensor	%	< ±0.5
Safe overload	%	200
Long-term stability (in% of the nominal sensor range)	%	< ±0.1
Temperature coefficient of unloaded sensor signal	%/°C	< 0.01
Temperature coefficient of the output signal	%/°C	<0.03
Operating temperature range	°C	from -10 to + 40
Life in terms of number of cycles of the nominal load		> 10⁷

DESCRIPTION	UNIT	VALUE
Power supply	V DC	from 5 to 15
Output sensitivity (output signal for 1V of power supply)	mV/V	from 1 to 2
Output signal of unloaded load-cell	mV	0 ± 0.2
Combined error (hysteresis + nonlinearity) (of scale)	%	< ± 0.2
Safe overload	%	150
Long-term stability (of scale)	%	< ± 0.1
Temperature dependence of output signal of unload load-cell	%/°C	< 0.01
Temperature dependence of output signal of load load-cell	%/°C	< 0.03
Temperature range - operating	°C	from - 10 to + 40
Temperature range - storage	°C	from - 20 to + 60