Made in Japan
Manufacturer: Kyowa Electronic Instruments Co., Ltd.
Model: BS-25AT
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.
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 |