The Cygnet integrating sound level meter 2031A is an indigenous product using state-of-the-art technology. It is very simple to operate and is an ideal and essential tool for noise measurement and data collection in the field. The meter can be used to read spot values, calculate short or long term Leqs, Sel, maxima, and minima. It can be set up and left unattended in the field, to collect data. The meter has a measurement range of 34 to 134 dB in three scales, each with a dynamic range of 50 dB. The scales are 34 to 84dB, 54 to104 dB, 84 to 134 dB. It measures noise with A, C and Lin weightings. Slow, fast and impulse time response is provided on the instrument. It displays SPL, Lmax, Lmin, Leq, Sel and time duration. All these parameters are software selected through the menu and are processed simultaneously to be viewed sequentially during processing. The instrument is powerful, compact, rugged, handy and small. The instrument is driven by an internal bank of rechargeable Ni Cd batteries, which are recharged insitu, by the standard charger, provided with the instrument. It is supplied with a Œ"electret condenser microphone, a wind shield and a brief case type carrying case, lined with heavy duty foam for providing protection during transit and in the field. There are a host of optional accessories.