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W.E. Anderson Series
F7 		Level Switches
Low cost, reliable and compact.
Hermetically sealed contacts.
RUCRU


Series F7 compact level switches combine low cost and reliability with fast, simple installation. Seven models assure you can choose just the right combination of features, capabilities and media compatibility for almost any application. Model F7 HSS is approved for use in hazardous locations. Hermetically sealed reed switches are actuated by magnets permanently bonded inside the float and can be easily adapted to open or close a circuit on rising or falling levels. Vertical mount models are shipped with normally open switch contacts which close as the float rises toward the mounting threads. Reverse switch action by removing the float, rotating it end-for-end and replacing it on the stem. Vertical models mount internally, oriented within 30° of vertical, or select optional fittings for external mounting. Contacts in horizontal models F7-HPS-1 (internal mount) and F7-HPS-2 (external mount), are normally open when the float is down and normally closed when the float is up. Horizontal model F7-HSS is in the normally open position when the indicating arrow points up, and normally closed when the arrow points down. Install model F7-HSS internally or externally. Switch ratings are suitable for many solid state control systems and monitors or alarms. Simple relay interfaces can be sued for higher current applications.

PHYSICAL DATA
Electrical Rating (Maximum):   F7-SB, -SS2             AC: 25VA. 1.0A, 200V DC: 10W, 1.0A, 200V
F7-PP, -BT, -HSS     AC: 30W, 0.14A, 220V DC: 0.28A, 24V; 0.07A, 120V
F7-HPS-1, -2            AC/DC: 15VA, 220V, 1.0A maximum
(F7-HSS is rated explosion-proof for Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III)
Mounting Connection:   1/8" NPTM (all vertical mount), ½" NPTM F7-HPS-2, F7-HSS), M16x2 (F7-HPS-1)
Wire Leads:   22 AWG x 18" (46 cm), vertical mount models; 22 AWG x 39" (1 m), models F7-HPS-1, -2, 22 AWG x 24" (61 cm) model F7-HSS
Magnet:   Alnico (F7-SB, -PP, -BT, -HPS), ceramic (F7-SS2, -HSS)
Weight:   F7-SB, 2 oz. (58 g); F7-SS2, 1.2 oz. (34 g); F5-PP, 0.8 oz. (23 g); F7-BT, 0.7 oz. (20 g)' F7-HPS-1, 1.5 oz. (43 g); F7-HPS-2, 2 oz. (57 g); F7-HSS, 3 oz. (94 g)

DIMENSIONS, INCHES (MM)
Model
Number
(A) Float
Length
(B) Float
Diameter
(C) Float
Height
(D) Actuation
from Hex1
F7-SB
F7-SS2
F7-PP
F7-BT
 		2.75 (70)
2.06 (52)
2.18 (55)
2.18 (55)
 		1.13 (29)
1.0 (25)
1.18 (30)
1.18 (30)
 		1.35 (35)
1.0 (25)
1.0 (25)
1.0 (25)
 		1.2 (31)
.73 (19)
.69 (118)
.69 (18)

1 Distance between hex and liquid (S.G. = 1.0) level at actuation point will vary with specific gravity changes.
FACTORY STOCKED MODELS
Model
Number
Material
Float/Stern
Max.
Temp.
Max.
Press.
Min.
S.G.
Approx.
Deadband
Vertical Mount
F7-SB

F7-SS2

F7-PP

F7-BT
 		Buna-N & Epoxy/
316SS
316SS (CYC)/
316SS
Polypropylene &
Epoxy/Polypropylene
Buna-N & Epoxy/
PBT*
 		220°F
105°C
300°F
149°C
220°F
105°C
220°F
105°C
 		150 PSIG
10 Bar
450 PSIG
31 Bar
100 PSIG
6.89 Bar
150 PSIG
10 Bar
 		0.60

0.75

0.60

0.45
 		1/16"
2mm
1/16"
2mm
1/8"
4mm
1/8"
4mm
Horizontal Mount
F7-HPS
-1, -2
F7-HSS
 		Polysulfone/
Polysulfone
315SS/316SS
 		185°F
85°C
392°F
200°C
 		150 PSIG
10 Bar
300 PSIG
20.7 Bar
 		0.85

0.60
 		3/16"
5mm
1/8"
4mm

*PBT-Polybutylene Terephthalate
Optional Fittings - For external mounting of vertical models
A-347        1/8" x 1 ¼" NPT carbon steel adapter
A-347-SS   1/8" x 1 ¼" NPT 316 stainless steel adapter
A-348        1/8" x 1 ½" NPT carbon steel adapter
A-348-SS   1/8" x 1 ½" NPT 316 stainless steel adapter

APPLICATIONS
Chemical processing systems, sumps, coolant tanks, oil reservoirs, fuel or water tanks, sterilizing equipment.
  • The F7-SB is an ideal general purpose switch.
  • The F7-SS2 is designed for high temperature, high pressure or corrosives.
  • The F7-PP is suggested for highly acidic conditions.
  • The F7-BT is an economical choice for lubricating and hydraulic oils, gasoline, diesel fuel and many solvents.
  • The F7-HPS-1, -2 are suitable for gasoline, kerosene or solvents.
  • The F7-HSS is designed for high temperatures or corrosives.

SUGGESTED SPECIFICATIONS
Level switch shall be operated by a (specify material) float actuating a SPST hermetically sealed reed switch potted in a (specify material) stem, with normally open contacts, reversible to normally closed. Switch shall be W. E. Anderson Model No. F7-____.




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