Midget Model 277 Levelometer from Ktech Industrial Products Inc.

Midget Model 277 Pneumatic Indicator
The Midget Model 277 Pneumatic gauge provides an economical way to achieve reliable and accurate tank gauging in vented tanks. Pneumatic gauges have been used for many years in tank gauging systems requiring remote indication with accuracy and stability over wide temperature ranges. These gauges are supplied with custom dials, depending on the application. Dial scales may be manufactured to indicate proportional (i.e. E, ¼, ½, ¾, F), litres, gallons, feet & inches, percentage of full and dual scale.

The Model 277 Midget Levelometer is recommended for tank capacities up to 5000 gallons. The maximum tank height is 10 feet. Its 3 ½" (90°) dial provides up to 50 graduations and is generally accurate to ± 2%.

Theory of Operation

The Midget Model 277 provides an intermittent capacity reading for vented tanks. The tank assembly is 3/16" copper tubing with an air chamber at one end. The tubing assembly is inserted into the tank until the air chamber touches the bottom. The other end of the tubing is connected to the tube fitting on the Midget gauge. The hand pump provides the source of air. Air is pumped through the tubing into the tank. The back pressure caused by the column height of liquid in the tank causes the gauge pointer to move and indicate the capacity of liquid in the tank. The gauge must be pumped again and another reading taken. When two consecutive readings are the same then an accurate measure has been obtained.

English Installation Brochure
French Installation Brochure