<table> <tbody> <tr> <td style="width: 15%;"><img alt="Multiple-Sensor_Interface_logo.png" src="https://1.bp.blogspot.com/-XZtyIU0jLlY/YKFDsA7wU1I/AAAAAAAAEMA/-avpWkcuX-IaIZAfZrs5azvD65lKPu17ACLcBGAsYHQ/s0/Multiple-Sensor_Interface_logo.png" style="max-width: 500px; width: 100%;"></td> <td style="width: 85%;"> <h1><span pbzloc="5" style="font-size: 36px;">  Pictures - Multiple-Sensor Interface</span></h1> </td> </tr> </tbody> </table>

1 - Multiple Sensor Interface Device

Multiple-Sensor interface device built as a 4 layer PCB (Printed Circuit Board) using SMD components.

Multiple Sensor Interface Device Top View — Multiple-Sensor device top.

Multiple Sensor Interface Device Bottom View — Multiple-Sensor device bottom.

Multiple Sensor Interface Device Side View — Multiple-Sensor device side.

2 - Software for Multiple Sensor Interface

The Multiple-Sensor Interface has 2 computer software applications: the 'Multiple Sensor Interface GUI', and the 'Calibrate Multiple Sensor Interface'.

Main window of Multiple Sensor Interface software.

About window of Multiple Sensor Interface software.

Calibration dialog for LCR (or ADC) sensors.

Dialog to configure trigger of channel logic variable used for logic output — Configure trigger of channel logic variable used for logic output.

Dialog to configure logic functions used on logic outputs.

Uploading calibration tables to Multiple Sensor Interface device.

Completed upload of calibration tables to Multiple Sensor Interface device.

3 - Capacitive Sensors

Example of sensors based on the variation of capacitance compatible with Multiple-Sensor interface.

Capacitive Water Level Sensor side view.

Capacitive Water Level Sensor back view.

Capacitive Water Level Sensor Diagram — Capacitive Water Level Sensor diagram/drawing.

4 - Inductive Sensors

Example of sensors based on the variation of Inductance compatible with Multiple-Sensor interface.

4.1 - Small displacement measurement sensor

Displacement(distance) sensor based on the variation of inductance, adeuqate for measuring straigh-line movements smaller than 1m(100cm)

displacement sensor inductive view position left — Displacement sensor (inductive) with placement strip on the left.

displacement sensor inductive view position center — Displacement sensor (inductive) with placement strip on the center.

displacement sensor inductive view position right — Displacement sensor (inductive) with placement strip on the right.

4.2 - Proximity sensor

Proximity(distance) sensor based on the variation of inductance, adequate for indicating if target is very near(or in contact) or far away.

proximity sensor for wood door view — Proximity sensor (inductive) on wood door.

proximity sensor for wood door drawing — Drawing of proximity sensor (inductive) for wood door.

proximity sensor aluminium door view — Proximity sensor (inductive) on aluminium door.

proximity sensor for aluminium door drawing — Drawing of proximity sensor (inductive) for aluminium door.

5 - Resistive Sensors

Example of sensors based on the variation of resistance compatible with Multiple-Sensor interface.

5.1 - Carbon filled foam pressure sensor

Carbon filled foam (aka. ESD/antistatic foam) pressure(or force) sensor based on the variation resistance, is adequate for indicating if pressure (or force) is slight, weak, moderate, strong; however it can also have its measurements calibrated with units of pressure (or force) (for example Pa=N/m²).

It is made by a flat piece of Carbon filled foam (PE or PU foam) 'sandwiched' between aluminium foil, connecting wires and non-conductive duct-tape on the outside providing packaging and electrical isolation. (PE - polyethylene; PU - polyurethane).

carbon foam pressure sensor.png — Resistive carbon filled foam pressure sensor drawing.

carbon foam pressure sensor — Resistive carbon filled foam pressure sensor.

5.2 - FSR sensor

The FSR (Force Sensing Resistor) sensor more approprite for measuring (quantitative) the force[N] (or pressure[Pa]), is a sensor based on the variation resistance.

Types of FSR Sensors — 2 types of FSR sensors.

What FSR sensors are made of — What FSR (resistive) sensors are made of.

5.3 - RTD(Resistance Temperature Detector) sensor

The RTD(Resistance Temperature Detector) is a sensor based on the variation of resistance appropriate for measuring (quantitative) the temperature[ºC].

Typical designation/model of RTD sensors are Pt100 or Pt1000 which are platinum(Pt metal) resistance thermometers with a nominal resistance at 0ºC of 100ohm or 1000ohm respectively.

Thin Film PRT, RTD sensor.png — Drawing of internal of Thin Film PRT RTD sensor, visible the internal thin layer of resistive material(normally platinum) on a ceramic substrate.

5.4 - LDR (Light Dependent Resistor) sensor

The LDR (Light Dependent Resistor) (aka photo-resistor) is a sensor based on the variation of resistance appropriate for measuring (quantitative) light or Illuminance[lux], [Lux]=[lm/m²], in a situation where isn't expected any significant change on room temperature, since LDR is a semiconductor resistor that will sense (be affected) also the changes in temperature.

INFO: For measuring light with a high accuracy when is expected changes of room temperature, is better to use instead a photodiode; however photodiode requires its own biasing and interface circuit where the output would be a voltage, so an photodiode would only be possible having an additional circuit to be connected on ADC channels.

LDR light sensor drawings — Drawing of a LDR sensor, is visible an internal track of resistive semiconductor material (example: p-type semiconductor combined with cadmium sulphide) over a ceramic substrate.

Multiple Sensor Interface - sensor demos video (from year 2014)

Video on Youtube with demo of measuring various sensors using the 'Multiple Sensor Interface':
Multiple Sensor Interface - sensor demos (from year 2014) - YouTube
https://www.youtube.com/watch?v=_h695CEq0z4

Multiple Sensor Interface - Blog

Pictures - Multiple-Sensor Interface