SD Card real time data logger 4 to 20 mA transmitter output SOUND LEVER METER, Data recorder

* Real time datalogger ,save the measurement data along the time information ( Year, month, date, hour, minute, second ) into the SD memory card and can be downlodeed the Excal ,extra software is no need.

* Frequency and time weighting meet ANSI 1.4 / IEC61672-2013 class 2.

* Auto range : 30 to 130 dB.

* 3 manual range :

30 to 80 dB, 50 to 100 dB, 80 to 130 dB.

* A/C frequency weighting.

* Fast/Slow time weighting.

* Peak hold, Data hold.

* 4 to 20 mA,signal output.

* Record (Max ,Min ) Data hold ,zero adjust.

* SD card capacity : 1 GB to 32 GB

* Dot matrix LCD display.

* Power by UM4/AAA ( 1.5V ) x 6 batteries or DC 9V adapter

* RS232/USB computer interface.

* Patented.