BS-25AT/25BT
Strain Transducer

Summary

These transducers are intended for measurement of the strain occurring inside concrete with comparatively large aggregates.
Strain transducers BS-25AT/BS-25BT are intended for measurement of the strain occurring inside concrete with comparatively large aggregates. Since a temperature measuring function is provided, these transducers can simultaneously measure strain and temperature.

Features

●The linear expansion coefficient is approximated to that of concrete to minimize temperature effects, thereby enabling measurement of external force-initiated strain and the strain corresponding to temperature stress.
●Minimal damage against vibrator during embedment and endures vibration by the RCD method.
●The rated capacity of BS-25AT is ±500μm/m, and BS-25BT is ±1000μm/m.

Products table

All display

BS-25AT
±500 ×10-6 strain

Specifications

Performance
Strain Measurement
Rated Capacity ±500 ×10-6 strain
Nonlinearity Within ±1.5% RO
Hysteresis Within ±2% RO
Rated Output 2.5 mV/V or more
(From minus to plus rated output)
Temperature Measurement
Rated Capacity -30 to 70ºC
Measurement Error Within ±0.5°C (-30 to 70°C)
Environmental Characteristics
Safe Temperature -30 to 80ºC
Compensated Temperature -20 to 70ºC
Temperature Effect on Output Within ±0.05%/ºC
Electrical Characteristics
Safe Excitation 10 V AC or DC
Recommended Excitation 2 to 10 V AC or DC
Input Resistance 350 Ω ±1% at 0ºC
Output Resistance 450 Ω ±0.8% at 0ºC
Cable 4-conductor (0.5 mm2) chloroprene cable, 11.5 mm diameter by 1 m long, bared at the tip
Mechanical Properties
Instrument Length 250 mm
Safe Overloads 120%
Apparent Linear Expansion Coefficient (11.5 ±0.6)×10-6/ºC
Weight Approx. 600 g

Dimensions

BS-25AT

BS-25BT
±1000 ×10-6 strain

Specifications

Performance
Strain Measurement
Rated Capacity 1000 ×10-6 strain
Nonlinearity Within ±2% RO
Hysteresis Within ±2% RO
Rated Output 2.5 mV/V or more
(From minus to plus rated output)
Temperature Measurement
Rated Capacity -30 to 70ºC
Measurement Error Within ±0.5°C (-30 to 70°C)
Environmental Characteristics
Safe Temperature -30 to 80ºC
Compensated Temperature -20 to 70ºC
Temperature Effect on Output Within ±0.05%/ºC
Electrical Characteristics
Safe Excitation 10 V AC or DC
Recommended Excitation 2 to 10 V AC or DC
Input Resistance 350 Ω ±1% at 0ºC
Output Resistance 450 Ω ±0.8% at 0ºC
Cable 4-conductor (0.5 mm2) chloroprene cable, 11.5 mm diameter by 1 m long, bared at the tip
Mechanical Properties
Instrument Length 250 mm
Safe Overloads 120%
Apparent Linear Expansion Coefficient (11.5 ±0.6)×10-6/ºC
Weight Approx. 600 g

Dimensions

BS-25BT

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