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LEVEL SWITCHES – SINGLE POINT
LS-74780 LS-1900TFE LS-1700TFE
Series
Number
Materials Min. Liquid
Sp. Gr. Operating Temperature
Pressure,
PSI,
Max.
Switch*
Part Number
Stem, Mounting
and Other Wetted Float Mounting Size
1/4˝ NPT 1/8˝ NPT
LS-74780 CPVC .85 -40°F to +180°F (-40°C to +82.2°C) 15 SPST, 20 VA 74780** —
LS-1900TFE Teflon®.80 -40°F to +300°F (-40°C to +148.9°C) 30 SPDT, 20 VA 133299 —
LS-1700TFE PTFE .86 +32°F to +212°F (0°C to +100°C) 25 SPST, 20 VA, N.O. — 174100
SPST, 20 VA, N.C. — 174200
1-1/2˝ DIA.
(38.1 mm)
3-7/16˝
(87.3 mm)
5/8˝ HEX
(15.9 mm)
1/4˝ NPT
21/32˝
(16.7 mm)
3/4˝
(19.1 mm)†
1-13/16˝
(46.0 mm)
2-25/32˝
(70.6 mm)
PVC JACKETED
LEAD WIRES
2-1/8˝ DIA.
(54 mm)
3-15/32˝
(88.1 mm)
21/32˝ HEX
(16.7 mm)
1/4˝ NPT
13/16˝
(20.6 mm)
.92˝
(22.3 mm)†
1-15/16˝
(49.2 mm)
2-21/32˝
(67.5 mm)
TEFLON JACKETED
LEAD WIRES
®
WIRE. 22 AWG.
TEFLON JACKETED
24˝ TO 26˝
(610 mm to 660 mm)
EXTENDED LENGTH
1/2˝ HEX. REF.
(12.7 mm)
1/8˝ NPT REF.
#174106.
RETAINING
CLIP
#174105.
FLOAT
5/16˝
DIA. REF.
(7.9 mm)
1-1/8˝
DIA. REF.
(28.5 mm)
1-31/32˝ REF.
(50.0 mm)
2-1/2˝ REF.
(63.5 mm)
ACTUATION
LEVEL
5/8˝ REF.
(15.9 mm)
Large Size – Engineered Plastics
Select from these Engineered Plastics for Aggressive or Ultra-Pure Liquids
Each of these series offers unique features. Choose from this selection
when all-plastic material is desirable and tank space is not restricted.
LS-74780 –
All CPVC
Particularly well suited
for rough service. Ideal
for use in chemical and
plating applications.
LS-1900TFE
Resists build-up of
foreign material or
sticky media. Float travel
remains uninhibited in
viscous or corrosive
liquids. SPDT switch.
LS-1700TFE
A medium-size solution
for ultra-pure liquid
level sensing. Made
of corrosion resistant
PTFE for low particle
generation.
Dimensions
†L1=Switch actuation level, nominal (based on a liquid specific gravity of 1.0 and N.O. dry circuit–dimension will vary for N.C. circuit).
Common Specifications
Electrical Termination: No. 18 AWG, 24˝ L., Lead Wires
(Jacket material is indicated on dimensional drawings, above).
How To Order – Select Part Number based on specifications required.
* See “Electrical Data” on Page X-5 for more information.
** Switch operation is selectable, N.O. or N.C., by inverting the float on the unit stem. Units are shipped N.O. unless otherwise specified.
†† 100 VA switches are not U.L. Recognized.
– Stock Items.
