Boiler house Level controls
2
Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2020
TI-P693-16 EMM Issue 1
LP11-4 Level Probe
Description The Spirax Sarco LP11-4 level probe is used with the Spirax Sarco LCS1350 level controller to provide on/off level control and alarm functions in steam boilers, tanks or other vessels. The four tip probe is particularly suitable where 3-lamp 'electric gauge glass' alarm/level indicators are fitted. The probe body is earthed through its screwed connection and the boiler or tank normally forms the earth return path. The probe may also be used in concrete or plastic tanks by using one of the tips as an earth return, or by providing a separate earth rod or plate. The LP11-4 probe has four detachable level sensing tips which are cut to length on installation to give the required switching levels. Note: Tips are ordered separately. When a tip is immersed in conductive liquid it completes an electrical circuit to earth. When the level drops below the tip, the resistance to earth becomes high, indicating to the controller that the tip is out of the liquid. Caution: The probe is not suitable for outside installation without additional environmental protection. Available tip lengths mm (inches) Tips are 1000 mm (39.4") long. Two sets of tips may be connected for
2.3 17
a maximum probe length of 2095 mm (82.5") Pressure/temperature limits Nominal pressure rating
PN40
Standard
32 bar g (464 psi g)
Maximum pressure
UL certified
30 bar g (435 psi g)
Standard
239 °C
( 462 °F )
Maximum temperature
UL certified
235 °C
( 455 °F )
Maximum
70 °C
(158 °F )
Ambient temperature
Minimum
-20 °C
( -4 °F )
Technical data Maximum cable length (probe to controller)
See controller IMI
Maximum sensing depth
2 095 mm ( 82.5" )
Minimum sensing depth
75 mm
( 3")
Degree of protection
IP54
Minimum conductivity (when used with an LCS1350 level controller ) 0.5 µS/cm @ 25 °C ( 77 °F ).
Page 1 of 4
Powered by FlippingBook