Boiler house Level controls
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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-P693-17 EMM Issue 1
LP40 High Integrity, Self-monitoring Low Level Alarm Probe
Description The Spirax Sarco LP40 level probe is used with a Spirax Sarco LCS3050 level switch to provide a high integrity, self-monitoring low level alarm signal, usually in a steam boiler. It consists of a probe body with a removable cable socket, and a separate screw-on probe tip which is retained by a lock-nut and pin. The probe has a level sensing tip (probe tip), and a comparator tip. The earth return path is via the body connection. Under normal operating conditions the probe tip is partially immersed, and the resistance to earth is low. When the water level drops below the probe tip the resistance to earth becomes high, causing the controller to give a low level alarm signal. The comparator tip compensates for any leakage to earth caused by scale, dirt, or internal moisture, ensuring a low water alarm signal even under adverse conditions. Principal features:
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- High integrity, self-monitoring low level alarm probe. - Suitable for pressures up to 32 bar g at 239 ° C.
- No maintenance required. - Positively retained probe tip.
Caution: The probe is not suitable for outside installation without additional environmental protection. Available tip lengths mm (inches) 500 (19.7), 1 000 (39.4) and 1 500 (59). Pressure/temperature limits Nominal pressure rating PN40 Maximum boiler pressure 32 bar g (464 psi g) Maximum temperature 239 ° C (462 ° F) Maximum ambient temperature 70 ° C (158 ° F) Designed for a maximum cold hydraulic pressure test of: 60 bar g (870 psi g)
Technical data Maximum probe cable length
See level switch IMI
Minimum conductivity (when used with LCS3050)
10 μS/cm
Degree of protection
IP54
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