Series-CLT

The Series CLT Continuous Level Transmitter is engineered for precision, custom-configured tank level monitoring in industrial applications including oil & gas, hydrocarbon storage, low-specific-gravity fluids, chemical feed, and general liquid storage. With selectable outputs (4-20 mA current or proportional voltage) and broad material options, it adapts to demanding installations requiring continuous rather than discrete high/low switching.

At the heart of the CLT is a float-and-reed-switch assembly contained within a sealed hollow stem. As the float ascends or descends with liquid level, it actuates reed switches which, in conjunction with a resistor network, provide a voltage or current output proportional to the level reading. 

Installation is straightforward: the unit can be supplied in lengths up to 72″ overall (with up to 68″ indication length), with user-specified distances from bottom mount to float stop, and float spacing to suit tank geometry. Available in either ½″ NPT, 1-1/4″ NPT, 2″ NPT or 3″ 150# flange mounting (depending on construction) to match process connections. 

Material options allow tailoring for fluid type and system condition: Choose stems/floats in 316 stainless steel for higher pressure or corrosive media (up to 300 psig), or Buna-N floats with brass stems for less demanding services (up to 150 psig). Temperature ratings likewise vary with material: e.g., Buna-N float water service up to 180 °F, or with oil service -40 °F to 230 °F. 

Electrical interface is user-friendly: current output units require 10-40 VDC and feature a junction box rated NEMA 4 (IP56). Voltage output models require 10-30 VDC and provide free leads. Loop resistance is rated up to 1.4 kΩ. 

Whether monitoring fluid levels in storage tanks, fuel oil sumps, hydraulic reservoirs or chemical process vessels, the CLT’s continuous output delivers actionable real-time data for control systems, alarms or records. Its flexible configuration, robust construction and industrial credentials make it a strong choice where full-range liquid level indication is needed instead of only high/low detection.