Application
The accelerometers BDK3, BDK10, and BDK100 are used for applications requiring high overload resistance, high long-term stability, small lower cut-off frequency, light weight and low power consumption. Typical applications include:
measurements on vehicles, machinery, buildings and plants for process control and error diagnosis
seismic measurements
vibration measurements
safety engineering
dynamic measurement of position and velocity
Technical Specifications
Type BDK3 BDK10 BDK100
Measuring range ±3g (ca.±30m/s2) ±10g (ca.±100m/s2) ±100g (ca.±1000m/s2)
Resolution <10-3g <5·10-3g <5·10-2g
Frequency range 1....300Hz 1....800Hz 1....1500Hz
Sensitivity at Ub = 5Volt appr.150mV/g appr.60mV/g appr.15mV/g
Temperature drift of sensitivity <+6·10-2 % / K
Temperature drift of zero point <0.1mV/K
Zero offset (2.5±0.1)Volt - generally: 0.5Ub±4%
Output impedance approx. 100 Ohm
Linearity deviation <1%
Transverse sensitivity <1%
Mechanical overload resistance in direction of measurement approx.10 000g (appr.100 000m/s2) !
Nominal supply voltage (regulated) UbN = 5Volt
Permissible supply voltage range Ubz=2V ... 16V
Current drawn at Ub = 5V approx. 2mA
Degree of protection IP65
Operating temperature -40°C ... +85°C
Storage temperature -45°C ... +90°C
Weight in stainless steel housing with thread without cable approx. 17Gramm
Weight in small housing without cable approx. 7Gramm
Standard electrical connection 3 highly flexible, color-coded wires 1mm length approx.18 cm (special lengths on request)
Alternative electrical connection for sensors in stainless steel housing 0.5m strong, flexible, shielded cable, 2 wires + shield, 2.1mm (special lengths on request)
on request: Special design for very low power consumtion up to 30μA
BDK3, BDK10, BDK100
Accelerometers of high overload resistance with integrated electronics for dynamic measurement of vibration and acceleration in the frequency range 1Hz to several kHz
BD-Sensoren
SEIKA front page
print version (pdf)
Features
very high overload resistance
insensitive to interference by magnetic and electric fields
multiple housing options
light weight
linear frequency response with little or no resonant peak at upper cut-off frequency
low non-linearity
small lower cut-off frequency
high signal-to-noise ratio
hermetically sealed
low transverse sensitivity
high long-term stability
integrated sensor electronics
low output impedance
long connection lines possible
Description
The dynamic accelerometers BDK3, BDK10, and BDK100 are capacitive spring-mass accelerometers with integrated sensor electronics. Resonant peaks are minimized by dynamic gas damping in the primary transformer.
The sensor electronics require only minimal power and are in conjunction with the capacitive primary transformer characterized by low error and high long-term stability.
