covers 30-130dB in the A scale and 35-130dB in the C scale with a resolution of 0.1dB and an accuracy of +/-1.5dB. Model 840028 also meets ANSI S 1.4 type 2 and IEC 651 type 2, and includes A & C decibel frequency weighting scales, fast or slow response, AC or DC output, low battery indicator, peak function and can be calibrated in compliance with OSHA using Acoustical Calibrator 840031. n addition the new model 840028 contains many advanced features including: An even larger LCD display with an analog bar graph, auto-ranging, max-min functions and an RS232 computer interface. Another special function allows you to accurately measure equipment noise in the presence of high background noise. Comes ready to use with a windscreen, 9V battery, instructions, and a hard shell carrying case.
Your discount price only  $259
Dimensions	11" x 3" x 1 ½ " (256 x 80 x 38 mm)
Weight	Weight: 8.5 oz (240 gr.)
Display	3½ digits LCD,
Range	6 ranges in 10-dB step:   30-80dB, 40-90dB, 50-100dB, 60-110dB, 70-120dB, 80-130dB
Auto Range	30-130dB
Accuracy	±1.5dB
Frequency	31.5Hz to 8KHz
Microphone Size	6mm(Diameter) Electric condenser Microphone
Measurement Weightings	Level A	30dB-130dB
	Level C	35dB-130dB
Response	Fast - readout is maximum value at 0.2 seconds Slow - readout is maximum value at 1.5 seconds
Output Signal	AC - 0.707Vrms at full scale DC - 10mV per dB
Quasi-Analog Bar Indicator	1dB display steps, 50dB display range, Updated every 50ms.
Operating Temperature	32 to 122F(0 to 50°C)
Operating Humidity	10-90% Relative Humidity
Power Supply	One 9V battery (approximate life-20 hours alkaline)
Accessories	Hard Vinyl Carrying case, Microphone wind shield, instructions, battery