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Dwyer Series F7 Level
Switch |
| Low
Cost, Reliable, Compact. Hermtically Sealed |
|  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.
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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)
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