MBB-02 Series – Miniature Force Sensors

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Product Description

The MBB-02 Miniature Force Sensor is designed for micro-measurement. It is used by many high end watch manufacturers for measuring the friction in the movement of mechanical watches and is also used in various medical applications.

The MBB-02 is entirely made of aluminum to combine lightness and stability of measurement. It has a nominal capacity range of 0.01 N to 5 N and uses semi-conductor strain gauges. Having a larger gauge factor than foil types, semiconductor strain gauges allow the measurement of very small strain. The sensor integrates a built-in overload protection offering up to 25 times security. Dedicated to laboratory applications, it is suitable for a temperature range of +15 °C to +25 °C. It can be easily connected to a PC or display unit through an external Wheatstone bridge amplifier. A version for Air Humidity compensation in ranges of 30 % to 60 % HR is also available. Applied force radially acts on the sensors pin which can be independently positioned in 2 different locations, thus offering more operating flexibility. Special versions with various cable lengths and connector outputs are also available.

Features

Nominal capacity: 0.01 N, 0.05 N, 0.1 N, 0.5 N, 1N and 5 N
Semiconductor strain gauges
Built-in high-capacity overload protection
Minute displacement
High natural frequency
High-strength aluminum alloy measuring spring
Compact dimensions
Force applicable in two positions
Humidity compensated version available (optional)

Specifications

MODEL	MBB-02-0.01	MBB-02-0.05	MBB-02-0.1	MBB-02-0.5	MBB-02-1	MBB-02-5
MECHANICAL CHARACTERISTICS
Nominal Load	± 0.01 N	± 0.05 N	± 0.1 N	± 0.5 N	± 1 N	± 5 N
Overload Limit	0.25 N	0.25 N	0.3 N	2 N	2 N	15 N
Overload at Rupture	> 1.5 N			>150 N		>300 N
Displacement at Nominal Force	< 0.02 mm	< 0.04 mm	< 0.08 mm	< 0.02 mm	< 0.04 mm	< 0.02 mm
ELECTRICAL CHARACTERISTICS
Nominal Sensitivity ^a)	4 mV / V	20 mV / V	40 mV / V	20 mV / V	40 mV / V
Input Impedance	750 Ω nominal
Output Impedance	750 Ω nominal
Insulation Resistance	>10⁹ Ω
Supply Voltage	5 VDC max.
Natural Frequency	≈ 170 Hz			≈ 700 Hz		≈ 3000 Hz
Combined Error (nonlinearity + hysteresis)	< ± 0.3 %			< ± 0.2 %
ENVIRONMENTAL CHARACTERISTICS
Long-term Stability and Error Caused by Changes in Air Humidity ^b)	max. ± 2 % proportional to nominal sensitivity in relative humidity ranges of 30 % to 60 % for a maximum of 72 hours
Operating Temperature	+ 15° C to + 25° C
Temperature Influence: On Zero	< ± 0.06 % / K			< ± 0.03 % / K
Temperature Influence: On Sensitivity	< +0.02 % / K
Protection Class	IP 42
ELECTRICAL CONNECTIONS
Connection cable	Shielded cable, length 0.5 m (standard) ^c)
Output connector (optional)	Axial connector, Lumberg SV 40 ^d)

a) Suitable strain gauge amplifier options: LMU Series (special version) Load Monitoring Unit
b) MBB-02 version A sensors only
c) Custom length available on request
d) Other connectors available on request

Applications

The compact dimensions of the MBB-02 allows adaptation to a wide range of small and precise applications (watchmaking for example) as well as long term dynamic measurements.

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