Boiler house

Level controls

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 2014

2.3.15

TI-P402-91

AB Issue 13

LP10-4

Level Probe

Description

The Spirax Sarco LP10-4 level probe is used with the Spirax Sarco

LC1350 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

LP10-4 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.

5

6

7

4

3

2

8

Approvals:

1

The LP10-4 is also available with a 1" NPT screwed connection,

approved to UL61010. Please note that this version will not be

marked and is not suitable for Europe.

Caution:

The probe is not suitable for outside installation without

additional environmental protection.

Available tip lengths mm (inches)

Tips are 1 000 mm (39.4") long. Two sets of tips may be connected

for a maximum probe length of 2095 mm (82.5")

Pressure/temperature limits

Nominal pressure rating

Maximum pressure

Maximum temperature

Maximum ambient temperature

Minimum ambient temperature

Technical data

Maximum cable length

(probe to controller)

Maximum sensing depth

Minimum sensing depth

PN40

32 bar g

30 bar g

239°C

235°C

70°C

-20°C

30 m

2 095 mm

75 mm

Standard

UL certified

Standard

UL certified

(464 psi g)

(435 psi g)

( 462°F )

( 455°F )

(158°F )

(-4°F)

(98 ft)

( 82.5" )

( 3")

Minimum conductivity (when used with an LC1350 level controller)

1 μS /cm @ 25°C (77°F).

Materials

No. Description

1 Probe body

2 Probe tips

3

Tip insulation

sleeving

4 Lower housing

5 Upper housing

6 Gland support pad

7 Cable gland

8 Tip steady

Material

Austenitic

stainless steel

Austenitic

stainless steel

PFA (Per Fluor Alkoxy)

BS EN 10088-3

(1.4306)

Type 316 / 316L

PPS (Polyphenyline sulphide)

PPS (Polyphenyline sulphide)

Thermoplastic elastomer

PA (Polyamide)

PEEK (Polyaryletherketone) Grade 450G