ASSIGNMENT

ANALOG SENSORS

EE2042

Electrical Measurements & Instrumentation

Name : S.P.M. SudasingheIndex No. : 100523GField : EE

1. Thermocouple

Vernier TCA-BTA

This sensor uses type-K thermocouple wire to measure temperatures in the range of -200 to 1400˚C. It can be used to measure flame temperatures as high as 1400˚C, or liquid nitrogen temperatures at -196˚C. This thermocouple has an internal ice-point compensation chip, so no need to place a reference wire in an ice-water bath. Can simply use one measuring lead to take temperature readings

Range -: - 2000C to 14000C

Typical Accuracy -:

0ºC to 900ºC: ∓2.2ºC

–200ºC to 0ºC: ∓5ºC

900ºC to 1400ºC: ∓15ºC

Power -: 100mA @ 5VDC

Resolution -: 0.400C

Source: http://www.vernier.com/products/sensors/temperature-sensors/tca-bta/

2. Strain Gauge

A strain gauge is a device used to measure the strain of an object. The most common type of strain gauge consists of an insulating flexible backing which supports a metallic foil pattern. The gauge is attached to the object by a suitable adhesive, such as cyanoacrylate. As the object is deformed, the foil is deformed, causing its electrical resistance to change. This resistance change, usually measured using a Wheatstone bridge, is related to the strain by the quantity known as the gauge factor.

Brand -: Micro Showa

FA series

Gage Length -: 0.3mm – 60mm

Gage resistance -: within ∓ 0.3% of the nominal resistance

Foil Material -: Cu-Ni Alloy

Base Material -: Polyester

Gage factor -: 2.00

Measurable Range -: 2 to 4% maximum

Temperature Range -: -30 to 800C

Gage factor change with temperature -: ∓ 0.015 %/0C

Fatigue Life -: more than 105 reversals

Source: http://www.showa-sokki.co.jp/english/products_e/Strain_Gage_e/strain_gage_config_e.html

3. "TP-L" / Ultralow-Capacity Torque Transducer (Reaction)

Detecting ultra low values of torque (1 to 100N•cm) in better accuracies. All aluminium construction. Small size and light weight (200g approx.). Applications: Material testing machines, testing equipment, etc

Safe Overload 150% RCRated Output 1.0mV/V±20%Nonlinearity 0.3%RO Hysteresis 0.3%RO Repeatability 0.2%ROExcitation Voltage 4V (or less)Safe Excitation Voltage 6VInput resistance 350ΩOutput resistance 350ΩCompensated Temp.Range -10 to 40Safe Temp.Range -20 to 60Temp.Effect on Zero 0.03%RO/Temp.Effect on Output 0.05%RO/Cable Φ4mm-4wire shielded cable, length :

3mAttached connector PRC03-12A10-7M

Source: http://www.showa-sokki.co.jp/english/products_e/Torque_Tr_e/Torque_Tr_tp_l_e.html

4. Accelerometer

Vernier Low-g Accelerometer

Power :- 30 mA @ 5 VDC

Range :- ±50 m/s² (±5 g)

Accuracy :- ±0.5 m/s² (±0.05 g)

Frequency Response :- 0–100 Hz

Resolution :- 0.037 m/s²

Source: http://www.vernier.com/products/sensors/accelerometers/lga-bta/

Alen Bardley 9000A Accelerometer (EK-43781I)

Sensitivity :- 10.2 mv/(ms-2) Range :- -490 to +490 ms-2 Frequency Range (∓5% ) :- 1.2…….5000Hz Typical resonant frequency :- 28kHz Temperature range :- -54….1210C Settling Time (Within 1% of bias) :- ≤ 2.0 s

Source: Appendix

5. Proximity Sensor

A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact.

A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor's target. Different proximity sensor targets demand different sensors. For example, a capacitive photoelectric sensor might be suitable for a plastic target; an inductive proximity sensor always requires a metal target.

PEPPERL Inductive sensor 921LC2

Rated operating distance :- 2mm

Assured operating distance :- 0 – 1.62 mm

Installation :- flush

Current consumption :-

Measuring plate not detected :- min 2.7 mA

Measuring plate detected ≤ 1.8 mA

Nominal Voltage :- 8.2 V

Ambient Temperature :- -10 to 650C

Source: http://www.pepperl-uchs.com/global/en/classid_143.htm?view=productdetails&prodid=5127#overview

Capacitive sensor CBB10-30GKK-A2

Rated Operating Distance :- 10 mm

Assured operating distance :- 0 – 8.1 mm

Installation :- flush

Operating Current :- 0 – 200 mA

Operating Voltage :- 10 - 30 V DC

Ambient Temperature :- -25 to 700C

The switching distance can be set over a wide range with the potentiometer

Source: http://www.pepperl-fuchs.com/global/en/classid_144.htm?view=productdetails&prodid=48571

6. Potentiometers

A potentiometer measuring instrument is essentially a voltage divider used for measuring electric potential. Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment.

Linear Motion PotentiometersThe linear motion potentiometer was developed to meet the needs of designers wishing to detect movement of position. Applications for these compact components include: Solenoid positioning sensors for automated controllers, volume control on audio equipment, joystick controllers, satellite dish positioning, and robotics.

Bourns Series 3046 & 3048

Series 3046 3048

Photo

Standard Electrical Travel 0.15, 0.25, 0.35 in. 0.2, 0.3, 0.4, 0.5 in.

Standard Resistance 1K to 50K ohms 1K to 50K ohms

Standard Resistance Tolerance ±20 % ±20 %

Independent Linearity ±5 % ±5 %

Resolution Infinite Infinite

Power Rating @ 70ºC (158ºF) 0.125 watt Range 2, 3 - 0.12 watt Range 4, 5 - 0.25

watt

Operating Temperature -55 ºC to +125 ºC -55 ºC to +125 ºC

Insulation Resistance 50 megohms @ 500 VDC 50 megohms @ 500 VDC

Rotary Type Potentiometers

Bourns PDA24 -24mm Long Life Potentiometer

Standard or high torque option Long life carbon element Plain or knurled shaft option Brass bushing Metal shaft Audio or linear taper options Variety of resistance values Standard Resistance :- from 10K to 1M ohms Standard Resistance Tolerance :- ±15 % Operating Temperature :- -10 °C to +70 °C Power Rating Linear Taper :- 0.5 watt Audio Taper :- 0.25 watt Maximum Operating Voltage Linear Taper :- 500 V Audio Taper :- 250 V Rotational Noise :- 100 mV max.

Source: http://www.bourns.com/ProductLine.aspx?name=commercial_panel_controls

7. Photoelectric Transducers

Photoelectric transducers employ the principle of electric conduction created by light energy. Photoconductive cells (Light Dependant Resistors) are one category of such photo electric transducer.

SENBA GL5516 LDR

Maximum voltage (DC) :- 150V

Maximum Power :- 100W

Spectrum peak value :- 540 nm

Light Resistance :- 5-10 kΩ

Dark resistance :- 0.6

Response Time (increase):- 30 ms

Response Time (decrease) :- 30 ms

Source: http://en.nysenba.com/index.php/page-6-40.html

INTERSIL ISL76671

The ISL76671 is a low cost, light-to-voltage silicon optical sensor combining a photodiode array, a non-linear current amplifier and a micro-power op amp on a single monolithic IC. Similar to the human eye, the photodiode array has peak sensitivity at 550nm and spans the wavelength range 400nm to 600nm, rejecting UV and IR light. The input luminance range is from 0.01 lux to 100 lux.

Parameters ISL76671Peak Spectral Sensitivity 550 nmVS (min) 1.8 VVS (max) 3 VSupply Current @ EV =100Lux 23 µALux Range (max) 100 luxOutput Voltage @ EV=100Lux 1.85 VDark Voltage @ EV=0Lux .95 mVRise Time 95 µsFall Time 155 µsDelay Time, Rising Edge (μs) 350Delay Time, Falling Edge (μs) 250Package Dimensions (mm) 2.0x2.1x0.70Pb Free? YesEnable Pin? NoSource: http://www.intersil.com/en/parametricsearch.html#g=optoelectronics&sg=ambient-light-sensors&f=light-to-analog-sensors--voltage-

APPENDIX