Made in Japan
Manufacturer: Kyowa Electronic Instruments Co., Ltd.
Model: BKK-A-2-D

These transducers provide not only resolution twice as high as conventional systems but also outstandingly improved temperature characteristics and long-term stability.
The BKK-A series inclination transducers on surface of structure. available in two types, uniaxial and biaxial, are designed to measure minute inclination quantities. They are suitably used in combination with a structural settlement transducer for measurement of the disturbance resulting from nearby engineering works as well as for measurement of landslide-initiated inclination of the ground surface.
These transducers provide not only resolution twice as high as conventional systems but also outstandingly improved temperature characteristics (temperature effect on zero balance ±0.36 seconds/°C with ±1° rated capacity) and long-term stability (±0.5% RO). Furthermore, a stopper for detector protection is provided to ensure high handling efficiency in a total working flow from transportation to installation and measurement. Also, their structure, with highly viscous damping oil filled in, improves vibration resistance.

Features

●External stopper provided
●Improved vibration resistance
●Biaxial type available (BKK-A-D)

Specifications

Performance

Rated Capacity	±2º
Nonlinearity	Within ±0.5% RO
Hysteresis	Within ±0.5% RO
Rated Output	3 mV/V or more

Environmental Characteristics

Safe Temperature	-20 to 70ºC
Compensated Temperature	-10 to 60ºC
Temperature Effect on Zero	Within ±0.005% RO/ºC
Temperature Effect on Output	Within ±0.02%/ºC
Long-term Stability	Within ±0.5% RO (For 6 months) This value is based on actual measurement and stated with dispersion taken into consideration. Stability slowly changes during a few months after installation, and then tends to become constant.

Electrical Characteristics

Safe Excitation	10 V AC or DC
Recommended Excitation	1 to 2 V AC or DC
Input Resistance	350 Ω ±1%
Output Resistance	350 Ω ±1%
Cable	4-conductor (0.3 mm2) chloroprene shielded cable, 7.6 mm diameter by 3 m long, bared at the tip (2 cables for biaxial models) (Shield wire is not connected to the case.)

Mechanical Properties

Measuring Direction	Biaxial
Safe Overloads	120%
Interference	Within ±1% RO
Material	Chromate-plated
Degree of Protection	IP56 (IEC 60529)
Weight	Approx.6.3 kg

Standard Accessories

Stopper fixing wing nut

Optional Accessories

●Wall-mounting Fixtures Designed to mount BKK-A transducers onto a wall surface; chromate-plated. BD-11A (For mounting 1 unit) BD-12A (For mounting 2 units) ●Horizontal Surface-mounting Fixtures Designed to mount BKK-A transducers onto a horizontal surface; chromate-plated. BD-31A (For mounting 1 unit) BD-32A (For mounting 2 units) ●Wall Protection Covers Designed to protect BKK-A transducers against external mechanical force; metal covers painted in grey. BD-21A (For BD-11A) BD-22A (For BD-12A) BD-41A (For BD-31A) BD-42A (For BD-32A)

Dimensions