Installation guidelines

For best operation and reliability, follow the guidelines explained below and in our published operating instructions.

All LDL sensors

Pipe size / recommended fittings

Pipe size	LDL100	LDL200	LDL201
1"	E43306 Type F Varivent fitting	Not recommended	Not recommended

1-1/2"	E43310 weld fitting E43307 Type N Varivent fitting

2"		E30130 weld fitting E33229 Type N Varivent fitting

≥ 2-1/2"			E33208 1-1/2" Triclamp fitting E33209 2" Triclamp fitting

Orientation

Preferable mounting is just before or in a vertical pipe with flow going up to ensure a full pipe. When installed in a horizontal pipe, install the sensor at a maximum of 45° from horizontal to avoid the influence of air bubbles or deposits but ensure the medium is in contact with the sensor tip.

Top mounting may be acceptable under the following conditions:

Pressurized pipe
Full pipe
No air bubbles

Straight pipe runs

To eliminate disturbances caused by bends, valves, pipe reductions, etc., provide at least 5 times the pipe diameter of straight run before and after the sensor.

LDL100 only

Mounting in plastic pipes

The design of the LDL100 requires both electrodes to be in contact with the medium. Therefore, a metal fitting such as E43313 (G1/2 BSPP x ¾” NPT) is recommended. The LDL200 is not affected due to its design.

LDL2xx only

Alignment of measuring channel

The measurement channel of the LDL2xx must be installed parallel to the direction of flow. An alignment mark is laser etched on the body of the sensor indicating the correct orientation in the pipe.

Tank mounting

Ensure the measuring channel (1) is vertical to prevent air bubbles and deposits.

LDL201 only

Tri-clamp mounting

The LDL201 is designed for used with tri-clamp fittings, but you must ensure adequate space to accomodate the insertion depth of 76 mm (3"). When using a standard instrument (short) tee with tri-clamp fittings, a minimum line size of 2-1/2" is required. See diagram below.