Wolf Clamshell Densitometer, become a speed reader with this accurate. Lift the shell and insert film, close the shell and press READ button. The measured optical display appears on the 3-digit liquid crystal display. The self-contained light source makes it convenient to use anywhere.

• LCD with polarity and low-battery indicator
• Zero Range: Auto zeroes to density 1.00
• Sensor: High efficiency silicon photodiode
• (C) Controls: (A) Zero pushbutton automatically (D) zeros unit (B) Power ON/OFF switch
• READ pushbutton-initiates READ sequence
• Calibration control - screwdriver adjusted 20-turn potentiometer to calibrate against a known step tablet
• Light Source: Special lamp turned on during measurement, provides long life with minimum intensity degradation. Also reduces heating to a minimum

• Dimensions (H x W x D): 2.4in x 3.2in x 7.1in
• Weight: 1 lbs (13 oz.)
• Range: 0.0 to 4.0 OD
• Accuracy: ±0.02D
• Reproducibility: = 0.01D
• Operating Temperature Range: 50°F to 104°F (10°C to 40°C)
• Aperture: 2mm
• Measuring Length: (Throat); 5.3 inches (135 mm)
• Display: 3-digit, 5 inch
• Power: Four 1.5V AA batteries