• Auto or manual ranging (3 ranges)
• “A & C" frequency weighting
• Large, easy-to-read LCD display
• Electret condenser microphone for high accuracy and longterm stability
• Internal 94 dB calibration
• RS232 computer interface
• Data Hold, Max Hold, Max/Min functionsand low battery indication
• Meets IEC651 Type 2 requirements
• Includes battery
• Measuring Range: 30 to 130 dB (A & C)

MODEL HX312
• Windows 95, 98, Me and XP compatible software
• Memory stores up to 12,280 records of Lp data
• Wide linearity range of 100 dB
• Real-time clock with calendar
• RS-232 interface

Model No. Mfg. No.      Description
HX311    SL-4012         Sound Level Meter
IA154      SL-4012K     Sound Level Meter w/ Computer Interface
HX312    SW-U801-WIN Data Acquisition Software