华商宝

Features

linear output characteristicshigh measurement accuracyhigh long-term stabilityhysteresis free output signalminimal zero point driftintegrated sensor electronicslow power consumptionsmall housinglight weightdifferent output signal optionsno interference by ambient electromagnetic fieldsminimal transverse sensitivity over whole measuring range!hermetically sealed

Description

The inclinometer NB3 is a static accelerometer preferably employed for measuring small inclinations.
The sensor's primary transformer consists of a capacitive spring-mass system with gas-dynamic damping.
The sensor is manufactured either with an analog DC or a pulse width modulated output. The integrated sensor electronics require only minimal power and are in conjunction with the capacitive primary transformer characterized by high accuracy and long-term stability.

Application

The NB3 is suitable for applications requiring a small, light sensor for measurement of relatively small inclination angles.
Typical areas of application include measuring instruments and inspection systems, vehicles, automation and safety engineering, scientific devices, medical and communications equipment as well as leveling systems.

Technical Specifications

	NB3
Dimensions	see dimension drawing
Measuring range	±10 degrees
Display range	±20 degrees
Resolution	<0,001degrees
Linearity deviation	<0,2% F.S.
Transverse sensitivity	negligible
Settling time	approx. 0.3 seconds (shorter times optional)
Supply voltage (regulated) Ub	5V
Permissible supply voltage range	3V ... 6V
Current drawn at Ub=5V	approx. 1mA
Degree of protection	IP65
Operating temperature	-40 bis +85°C (125°C optional)
Storage temperature	-45 bis +90°C (125°C optional)
Weight without cable	approx. 25 grams
Electrical connection	3 highly flexible wires Øapprox.1mm, length 18cm optional: 0,5m shielded cable Ø2,1mm 3 flexible Teflon-coated wires
Values for analog DC output at UbN=5 Volt
Sensitivity	approx. 17mV/degree
Temperature drift of sensitivity	< +1·10-2%/K
Temperature drift of zero point	< ±0,025mV/K
Zero offset at Ub=5V	2,5±0,1Volt - generally: 0,5Ub±4%
Output impedance	10 kOhm

 

Summary of standard SEIKA products

 

Static Accelerometers (lower cut-off frequency = 0 Hz)

 

Model	Measuring range	Resolution
B1, B2, B3	±3g, ±10g, ±50g ( 1g = 9.81ms-2 )	<0.001g, <0.005g, <0.01g

 

Dynamic Accelerometers (lower cut-off frequency = 1 or 10 Hz)

 

Model	Measuring range	Resolution	Frequenzy range
BDK3	± 3 g	< 10-3 g	1...300 Hz
BDK10	± 10 g	< 5*10-3 g	1... 800 Hz
BDK100	± 100 g	< 1*10-2 g	1... 1.5 kHz

 

Inclinometers

 

Model	Measuring range	Resolution
NB3	±10° (±20°)	<0.001°
NA2-05, NA2-10 NA3-30 NA4-45, NA4-70	±5°, ±10° ±30° ±45°, ±70°	<0.001Grad, <0.002Grad <0.005Grad <0.01Grad, <0.01Grad
N2, N3, N4	±10°, ±30°, ±70°	<0.001°, <0.005°, <0.005°
NG2, NG3, NG4	±10°, ±30°, ±80°	<0.001°, <0.005°, <0.005°
NG...I	Inclinometer type NG2, NG3, NG4 with integrated 4...20mA signal conditioner
NG...U	Inclinometer type NG2, NG3, NG4 with integrated 0...5V signal conditioner
NG360	Inclinometer with 360° measuring range and integrated microprocessor and RS485 interface

 

Sensor boxes (for harsh operating conditions)

 

Model	Features
SB1I	Sensor box (98 x 64 x 56mm3) with one integrated SEIKA sensor of any type and one integrated signal conditioner with 4...20mA output.
SB2I	Sensor box (98 x 64 x 56mm3) with two integrated SEIKA sensors of type B, BD, BDK, N or NB and two integrated signal conditioners with a 4...20mA output each. Both channels are electrically isolated from each other.
SB1U	Sensor box (98 x 64 x 56mm3) with one integrated SEIKA sensor of any type and one integrated signal conditioner with 0...5V output.
SB1S	Sensor box (98 x 64 x 56mm3) with one integrated SEIKA sensor of any type, one integrated signal conditioner with 0...5V output and two open collector switch outputs that respond to traversing of adjustable thresholds.
SBS1U	Sensor box (98 x 64 x 56mm3) with one integrated SEIKA-Servo-Inclinometer for measuring small angles of up to 2 degrees with very high resolution and an integrated signal conditioner with 0...5V output.
SB360	Sensor box (98 x 64 x 56mm3) with one integrated SEIKA sensor of type NG360, internal microprocessor and RS485 interface.
SBG2U	Sensor box (124 x 80 x 58mm3) with two integrated SEIKA sensors of type NG and two 0...5V outputs.
SBG3I	Sensor box (124 x 80 x 58mm3) with three integrated SEIKA sensors and three integrated signal conditioners with 4...20mA output.
SBL1	Sensor box (180 x 180 x 100mm3 - large and robust) with one integrated SEIKA sensor of any type and one integrated signal conditioner with 4...20mA output.
SBL1S	Sensor box (180 x 180 x 100mm3 - large and robust) with two integrated SEIKA sensors of any type, one integrated signal conditioner with 4...20mA output, one integrated signal conditioner with 0...5V output and two safety relays that respond to traversing of adjustable thresholds. The SBL1S has two redundant, electrically isolated measuring channels for safety related applications.
XB..	Extra robust, pressure-, saltwater- and corrosion-proof stainless steel sensor box (ø120 x 50) as an alternative to the SB.. housings (180 x 180 x 100mm3) for especially harsh operating conditions, aggressive fluids and saltwater.
SC485B	Box (63.5 x 58 x 35mm3) with RS485/RS232 converter for operation of inclinometers NG360, SB360, and XB360 from a RS232 port.

 

Sensor accessories

 

Model	Features
NV4a	Filtering signal conditioner for sensor signal matching with symmetrical +/- 4 V voltage output
NV6a	Filtering signal conditioner for sensor signal matching to a 4...20mA, 2-wire interface
NV8a	Filtering signal conditioner for sensor signal matching with an asymmetric 0...5V output voltage
SW3	Sensor cube for multiaxial arrangement of SEIKA accelerometers and/or SEIKA inclinometers
SBBS, SBBB, SBBW	Fixing plates from stainless steel for sensor boxes SB..