LUTRON SL-4112

* 30-130 dB, auto range, manual range. 
* Frequency and time weighting, IEC 61672 class 2. 
* A or C frequency weighting. 
* Fast/Slow time weighting, peak hold. 
* Data hold, Record(max., min.). 
* AC output, RS232 computer interface. 
* Data logger. 
* Type K Thermometer : -100 to 1300 oC, oC/oF. 
* Type J Thermometer : -100 to 1200 oC, oC/oF. 
* Optional probe(EM-900P)for Humidity/Temp., Light and Anemometer measurement. 
* DC 1.5V battery(UM-4, AAA)x 6 or DC 9V adapter in. 
* Patened.