The cygnet offers a sound level meter 2013 is a low budget instrument intended to be used as a survey instrument. It is ideal for taking spot measurements. Using the acoustic calibrator 3022 the 2013 can be field calibrated.This sound level meter can measure a range from 50-115 dba in a single range. The db value detected by a true rms detector is displayed on a digital display with 0.1 db resolution. The meter has an in-built fixed weighting network, which is the most commonly used weighting network for environmental and machine noise measurements; and a switch selectable time weighting response, which can be switched between slow and fast. It has a fixed inbuilt ½ pre-polarised condenser microphone. The instrument is powered by four aa size [pencil batteries], which give a life of about 120 hours of continuous use on alkaline cells. It is supplied in a soft carrying case with a windscreen and operation manual.