Features

• robust pressure die cast aluminium housing (IP67) with saltwater proof coating
• twist free 4-point fastening of rigid, 3.2mm thick base PCB
• integrated signal conditioner with 0.5 ... 4.5 Volt output
• temperature drift compensation of the sensitivity
• 9V ... 30V supply voltage
• all SEIKA sensors fit the housing and can be installed in different directions of operation
• the output signal of the sensor is calibrated to customer's specifications in the required direction of operation
• sensor and signal conditioner electrically isolated from housing
• EMC certified
• highly stable sensor supply voltage
• programmable dynamic response
• high mechanical overload resistance
• low pass filter with optional choice of cut-off frequency for suppression of interference frequencies

Description

The SB1U is a pressure die cast aluminium sensor housing (IP67) with an integrated sensor for measuring uniaxial acceleration or inclination.

As well as the sensor, the box contains a signal conditioner with 0.5 ... 4.5 Volt output and a separate, highly stable supply voltage that can be used externally as a reference point. Furthermore, the signal conditioner includes an active low pass filter, whose upper cut-off frequency / settling time can be adjusted to suit the measurement task, and a noise voltage filter to guarantee the EMC. Interference signals caused by unwanted ground currents are eliminated by electrically isolating sensor and signal conditioner from the housing. Unlike the SB2.., the SB1U can accommodate larger inclinometers, such as the NG.. series, that have a higher measuring accuracy. Electronic temperature compensation largely compensates for the temperature drift of the implemented sensor's sensitivity. Optionally, the temperature drift of both offset and sensitivity can be reduced significantly through individual compensation.

The compact metal cable gland and small housing size in combination with the max. 5-wire connection enable the use of this high quality measuring system in harsh operating conditions.

Application

The SB1U is suitable for applications requiring precise inclination or acceleration measurements under harsh circumstances and returning of a 0.5 ... 4.5 Volt output signal. Areas of successful implementation include construction, mining, agricultural machinery, transportation and conveyor systems, ships, operation and automation technology as well as general mechanical engineering.

Specifications

• • The box is delivered with an individual calibration record that includes the precise offset and sensitivity values, the static characteristic curve and the linearity deviation curve.

• Options:

• • special measuring ranges • silicon encapsulation • custom wiring
• • individual temperature drift compensation of the offset and the sensitivity

3D geometry as STEP file

Dimensions (in mm) and Connections

Attention! Do not short circuit the supply voltage with one of the outputs.

Measuring planes and directions for N..., NB..., B... und BDK... sensors:

N-sensors: any zero-angle and +/- rotation in both directions can be realised. The cable output can be on the right (as drawn), left, bottom or top of the box. The measur­ing direction as drawn for the NG-sensor (see drawing 1) can also be realised.

NB-sensors: four zero-angles offset by 90° can be realised as well as +/- rotation in both directions.

B-, BDK-sensors: acceler­ation can be mea­sured in X-, Y- and Z-axes. For X- and Y-axes both +/- measur­ing directions can be realised.

As illustrated here most rotation planes and acceleration directions can be measured with SEIKA sensorboxes. The resulting multitude of possibilities make configuration difficult, however. We'd be glad to give you advice on putting together the components best suited for your measurement task and are happy to receive your information on what planes and directions the inclinations and/or accelerations are to be measured. A sketch of your situation is often very helpful.