For Extech SL130G Sound Level Monitor:

This Remote Relay Alarm Kit provides a means to interface the Extech SL130G Sound Level Monitor or the RH520A Humidity-Temperature Recorder to an external device to indicate when over limit condition occurs. Includes a 10A AC solid state relay, 9-Foot (3m) alarm relay trigger cable, nickel-plated screws and saddle clamps.

From noisy nightclubs to loud manufacturing facilities, Extech decibel meters are used around the world to test whether a sound level exceeds levels established by municipal or national laws. Occupational safety and health standards turn to Extech for a reliable sound meter (commonly called a dB meter or noise meter) to determine an acceptable noise level with and without hearing protection. For on-the-person occupational sound measurement, Extech’s noise dosimeter selection offers options for datalogging personal exposure to excessive sound levels.