Martindale SP79 Sound Level Meter 
For industrial and office environments
Suitable for Noise at Work measurements
Complies with BS EN 61672-1:2003
A & C frequency weighting
Fast & slow time weighting
 The SP79 is a Class 2 sound level meter for on-site measurements in accordance with Noise at Work legislation in industrial and office environments. Featuring A and C frequency weighting and fast and slow time weighting, the compact design can be handheld, or mounted on a tripod for longer term monitoring of Min / Max values. Detailed recording and analysis can be made using the AC and DC outputs.
The SP79 complies with BS EN 61672-1:2003 and is supplied with a detachable windshield and hard carry case. The large high contrast display includes both digital reading and analogue bar graph.