The popular ACT/1345 Sound Level Meter has been superseded by the ACT/179 Sound Level Meter

https://actmeters.co.uk/specialist-tools/new-act-179-sound-level-meter

The ACT 179 has higher resolution, further improved accuracy, and comes with a robust case.

The ACT/179 is compliant with BS EN 61672-1 Class 2 and is supplied with a detachable windshield and quality hard carry case.

The large high-contrast display includes both digital reading and analogue bar graph.

An instrument complying with BS EN 61672-1, set to slow response and A weighting, is suitable for measuring the sound pressure level of the alarm signal.

If you require a meter specifically for?fire alarm commissioning, the ACT/179 is designed to meet the requirements of BS 5839-1

Measuring level range: 32 - 130dB

Frequency range: 20Hz - 8kHz

Frequency weighting: A or C

Level ranges:

Lo: 30 - 90dB

Med: 50 - 110dB

Hi: 70 - 130dB

Accuracy: +/-1.4dB (ref. 94dB@1KHz)

Dynamic range: 60dB

Time weighting: Fast or slow

Microphone: 1/2 inch electret condenser microphone

AC output: 1 Vrms at full scale (full scale is the upper limit of the selected level range)

DC output: 10mV/dB