Indus scientific presents smoke meters based on hartridge geometry and micro-controller technology. These meters have long path length, which ensures high accuracy in results. Backlit lcd display [large size] is attached to the smoke meter. Besides this, dot-matrix printer, 24 column in built printer is fitted to the meter. Technical specifications of the smoke meters are: keyboard- membrane keypad, 18 keys; light source- halogen lamp, 12vdc; detector- photocell with filters; temperature sensor- rtd [pt100]; warm-up time- 30 minutes; response time; less than 1 second; operating temperature- 0 to 50 degree celsius; power supply- 230v ac; control unit- 340 x 130 x 240 mm; measuring unit- 630 x 250 x 250 mm. Due to competitive price and low maintenance cost, these meters are very economical.