Laser-based Opacimeter instrument measures optical transmission property of a medium in terms of Opacity. It is based on a simple and accurate method of laser transmission principle. A beam of green light emitted by laser diode pass through the medium whose opacity is to be measured. The laser diode emits 50 mW optical power at 532 nm wavelength. The intensity of the laser beams before transmission and after transmission is measured. Based on these measurements the transmittance and Opacity of the medium is calculated. It has an important application in determining the transmissivity of a medium and in estimation of smoke emitted from a chimney/stack of an industry.

1. Stand alone laser based instrument
2. Non-contact, non-intrusive in nature
3. Measures Opacity of the medium between transmitter and receiver unit
4. Microcontroller based circuit
5. LCD display for user interface
6. USB interface available for online monitoring
7. Operates from 230V mains supply. No need to provide external DC supply
8. Can be developed as a device for long-term monitoring of smoke/exhaust emitted from the stack of an industry
9. Monitoring unit can be at long distance from stack

Measurement of

1. Opacity of a medium Smoke emission from stake or chimney of furnace and Exhaust emission from an engine, after suitable instrumentation.

Laser-based Opacimeter instrument measures optical transmission property of a medium in terms of Opacity. It is based on a simple and accurate method of laser transmission principle. A beam of green light emitted by laser diode pass through the medium whose opacity is to be measured. The laser diode emits 50 mW optical power at 532 nm wavelength. The intensity of the laser beams before transmission and after transmission is measured. Based on these measurements the transmittance and Opacity of the medium is calculated. It has an important application in determining the transmissivity of a medium and in estimation of smoke emitted from a chimney/stack of an industry.

1. Stand alone laser based instrument
2. Non-contact, non-intrusive in nature.
3. Two small Transparent windows only required across circumference of the stack.
4. USB interface available for online monitoring.
5. Operates from 230V mains supply. No need to provide external DC supply.
6. Can be developed for long-term monitoring of smoke/exhaust emitted from the stack of an industry.
7. Monitoring unit can be at long distance from stack.

Measurement of

1. Opacity of a medium
2. Smoke emission from stake or chimney of furnace, Exhaust emission from an engine, after suitable instrumentation.

SPECIFICATIONS OF THE SYSTEM

Sr. No.	Specification	Value
1	Measuring principle	Light transmission
2	Optical Source	Laser diode
3	Operating wavelength	532 nm
4	Measurement reading	% Opacity
5	Path length between transmitter and receiver (duct diameter)	0.5 m - 2 m
6	Accuracy	±5%
7	Repeatability	2 %
8	Processing electronics	Microcontroller based
9	Operating voltage	230 VAC,50 Hz
10	Power Consumption	< 10 Watt
11	Operator interface	LCD display
12	Communication interface	Through USB port

SPACE

1. Apprx. 400 sq. ft total area may be adequate.

MAN POWER

1. One Electronics or Instrumentation Engineer for production, assembly & testing of electronic components, development of firmware and software, etc.
2. One Technician (Electronics) for assisting in components mounting, testing, etc.
3. One Technician (Mechanical) for manufacturing/assembly of mechanical components.

POWER SUPPLY

1. For testing, a 24 V/5 A variable power supply can be used.

TEST EQUIPMENT

1. Standard Test & measuring facility for electronic systems, mainly oscilloscope, digital multimeter, etc.

Other facilities

1. Arduino Microcontroller programming and testing facility