
HIGH-TEMPERATURE LIQUID-LEVEL SWITCHES
All Stainless Steel Construction
LV-40/50 Series
U Well Suited for Rough
or Corrosive Liquids
U Water-Purifying
and Medical
Application Models
U High-Pressure Models
up to 750 psi
U Normally Open or
Normally Closed SPST
Switch, User Selectable
U Mounts Vertically at Top
or Bottom of Tank
Constructed entirely of 316 SS, the
LV-40 single-station level switch is
designed to withstand the effects of
a wide range of chemicals. With a
maximum operating temperature of
149°C (300°F), this switch is ideal
for medical and water purification.
Its small float displacement allows
for high accuracy and reliability in
shallow tanks and reservoirs.
The LV-50 Series level switches
deliver superlative performance
and dependability under the most
severe operating conditions. The
sensor incorporates a larger float
displacement and all stainless steel
construction for consistent level
monitoring in liquids pressurized
up to 750 psi. Ideal for level
sensing in chemical plants and
systems, models are available for
temperatures up to 249°C (480°F).
SPECIFICATIONS
Stem Material: 316 SS
Float Material: 316 SS
Operating Temperature:
-40 to 149°C (-40 to 300°F);
-40 to 249°C (-40 to 480°F) for LV-52
Pressure Rating: 100 psi for LV-40;
750 psi for LV-50 Series
LV-40 shown
smaller than
actual size.
LV-50 shown
smaller than
actual size.
1
⁄8 NPT
1
⁄2 Hex
1
⁄16
2
3
⁄4
1
11⁄2 Dia
1
Mounting:
for LV-50 Series
Switch: SPST
Switch Actuation: Approx.
distance from end of stem to mounting,
or at halfway point of float travel
Lead Wires: 22 AWG, 24" polymeric;
18 AWG, 24" polymeric for LV-50 Series
Specific Gravity of Float:
LV-40: 0.62; LV-50: 0.64
Note: To determine fluid specific
gravity, add 0.1 to float specific gravity
in clean liquids and 0.3 to float specific
gravity in dirty or viscous liquids.
⁄8 NPT for LV-40; 1⁄4 NPT
Dimensions (inch)
1
⁄2 the
5
⁄8 Hex
3
1
⁄32
Solid State
Relays
Available!
For complete technical and ordering
information, please visit us online.
1
⁄4 NPT
3
3
⁄8
1
⁄16
2
To Order
Model No. Temperature Rating Switch Rating
LV-40 -40 to 149°C (-40 to 300°F) 10 VA
LV-50 -40 to 149°C (-40 to 300°F) 20 VA
LV-51 -40 to 149°C (-40 to 300°F) 100 VA
LV-52 -40 to 249°C (-40 to 480°F) 20 VA
Comes complete with operator’s manual.
Ordering Example: LV-51, all stainless steel high-temperature liquid-level switch with a
100 VA rating.
LV-40, all stainless steel high temperature liquid-level switch with a 10 VA rating.
K-93