Extech’s new Type 2 sound level monitor with alarm, Model SL120, gives a warning when sound levels exceed the programmable set point. Adjustable between 30-130 dB, the alarm warning can be easily seen on large LCD and over-limit indicator. The SL120 can also send a signal to optional relay module to illuminate any remote “noise exceeded” indicators.Extech Instruments Corp., Waltham, MA.