some instrumental sensors

1. SENSORS

2. CONTENT
• INTRODUCTION
• TRANSDUCER
• CLASSIFICATIONS OF INSTRUMENTS

3. INTRODUCTION
• CONVERTS PHYSICAL CHANGE INTO
ELECTRICAL OR NON-ELECTRICAL QUANTITY.

4. INTRODUCTION

5. TRANSDUCER
• A transducer is a device that converts one form
of energy to another

6. Some typical Sensors and Transducers
Thermistors Ambient Light Sensor Thermocouple

7. Some Typical Transducers
LVDTs RTDs Thermowel

8. CLASSIFICATIONS OF
INSTRUMENTS

9. ON THE BASIS OF SIGNALS
Analog Digital
• An Analog instrument gives an • A digital instrument has an
output which varies output which varies in discrete
continuously as the quantity steps and so can only have a
being measured changes finite number of values

10. ON THE BASIS OF POWER
CONSUMPTION
ACTIVE PASSIVE
• External power source is • No external power source is
needed required

11. ON THE BASIS OF OPERATION
Automatic Manual
• An auxiliary device is present. • Need an operator.
• Fast dynamic response. • Poor dynamic response.
• Lower operating cost. • Operation cost is higher.

12. On the Basis of display of result
Deflection Null
• Simple in construction and • Manual operation.
operation. • Poor dynamic response.
• Good dynamic response.

13. On the Basis of contact
Contacting Non contacting
• Instrument is present in the • Not in direct contact with the
medium itself. measuring medium.
• Eg. Clinical thermometer. • Eg. Optical pyrometers.

14. Thank you
SUBMITTED BY: Amit Thakur