BLSK-95107B
Revised 10-03
Catalog Section 15
(00-02-0052)
Bilge Level Switch System
BLSK1 Series
(1)
■
Operates Bilge Pumps or Alarms
■
■
Uses Proven “Air Cell” Actuated System
Remote Switch and Moving Parts Kept
Unaffected by Corrosion
(2)
■
■
Aluminum Body and Cover
Includes 3 Assemblies:
(1) BLS1 Bilge Level Switch
(2) MACT1 Tube Kit (Sensor Line and Fittings)
(3) MAC1 “Air Cell” (Volume Cell)
(3)
Description
Dimensions
Case/Lid: Aluminum (std).
Bottom Plate: Glass-filled Nylon.
The BLSK1 Bilge Level Switch System gives
you all items and fittings necessary to install in
your bilge. Or, you can have only the parts you
want and you provide brackets, tubing and mount-
ing hardware.
5-1/2 in.
(140 mm)
BLS1
Process Connection: 1/4 NPTF.
(Bilge
Level
Max. Pressure: 25 psi (172 kPa) [1.72 bar].
Conduit Connection (electrical): 1/2 NPT.
BLS1 Weight: 3 lb. (1.4 kg).
Switch)
6-5/32 in.
(156 mm)
Using the proven “Air Cell” actuating system, all
moving parts and switching are remote from bilge
liquids and are thus not affected by corrosion,
rust, etc. All wetted parts are of non-corrosive
materials.
1/2 NPT for electrical
connections
BLS1 Dimensions: 6-1/4 x 6-1/4 x 6-1/4 in.
(159 x 159 x 159 mm).
MACT1 Tube Kit
(Sensor Line)
15050737 Optional mounting bracket
As bilge level rises a column of air is captured in
the MAC1 Air Volume Cell. The rising bilge
level compresses the column of air creating pres-
sure against the large diaphragm in the BLS1
Bilge Level Switch and the switch trips. Switch
set point is adjustable.
16 ga., 304 stainless steel (see Dimensions).
4 feet long
(1.21 m) std.
MACT1 Tube Kit (fittings included)
4 ft. (1.21 m) flexible non-corrosive
tubing, 1/4 in. (6 mm) dia. (cut to fit).
MAC1
(Volume Cell)
MACT1 Weight: 0.5 lb. (0.23 kg).
1/4-20 hex bolt
The switch resets as the bilge is pumped out. Air
cell recharges itself during normal operation.
The BLS1 is constructed of materials not affected
by marine atmospheres; Aluminum or Bronze
body and cover, Buna-N diaphragm.
MACT1 Dimensions: 6 x 6 x 6 in. (152 x 152
x 152 mm).
3-1/4 in.
(83 mm)
(2-places) and nuts
5-3/16 in.
(132 mm)
MAC1 Air Cell (Volume Cell)
• Made of non-corrosive materials
• (2) 1/4-20 stainless steel hex bolts and nuts.
Optional Mounting Bracket (15050737)
2-3/8 in.
(60 mm)
9/32 in. (7 mm) dia.
MAC1 Weight: 2 lb. (1 kg).
Specifications
4-places
MAC1 Dimensions: 6 x 6 x 6 in. (152 x 152
x 152 mm).
BLS1 Bilge Level Switch
1-1/2 in.
(38 mm)
Snap-Switch SPDT (standard)
• 5 A @ 125, 250, or 480 VAC
• 1/2 A @ 125 VDC, 1/4 A @ 250 VDC
NOTE: A pilot relay may be used for higher
contact ratings (see Typical Wiring Diagram).
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