This electronic sight glass sees into the refrigerant tubing by means of
ultrasonics. Two sensors are used, one for transmitting and one for receiving.
These sensors are in the form of clamps, which attach to any metallic
refrigeration tubing. An audible beeping sound quickens as bubbles or floodback
are sensed, and a row of LED's light, simulating bubble movement in the tubing.

• Optimizes refrigerant charge for maximum cooling
  
• Operates on any metal tubing
  
• Four foot cord
  
• Operates through use of ultrasonics
  
• Eliminates the need for an optical sight glass
  
• Checks for refrigerant floodback
  
• Built into ABS carrying case
  
• One year warranty

• Operating Temperature: 32 to 125 degrees F (0 to 52 degrees C)
  
• Power Supply: (1) 9V battery
  
• Battery Life: 6 degrees hours of use
  
• Response Time: Instantaneous
  
• Probe/Cord Length: 48in. (1.2m)
  
• Dimensions: 8.7in. x 7in. x 2in. (22cm x 18cm x 5cm)
  
• Weight: 1.4 lbs. (636 g)