The CLS2 Capacitive Level Switch was designed to sense material
level in a wide range of applications and environments using the
dielectric properties of the sensed material. State of the art sensing
technology in the CLS2, using impulse RF admittance measurement
combined with an active guard, provides excellent level measurement
and stability while being insensitive to material buildup. This technology
also provides immunity to external RF sources like walkie-talkies and
cell phones as well as minimal interference with radio communication or
other electronic systems.
The product features automatic calibration and 8 selectable sensitivity
levels. Calibration may be initiated with either the internal switch or
using the external calibration magnet allowing calibration without
removing the cover. A selectable failsafe mode allows the relay to be
active either normally open or normally closed. The unit also features an
active guard mechanism that effectively eliminates the effects of
material buildup on the probe. A selectable delay is provided to ensure
false detection due to splashing or other tank disturbances will not
cause nuisance triggering. A high brightness LED indicator is provided
externally so that the level status can be easily seen even in bright
sunlight. Three multicolored LEDs are provided internally for
maintenance and diagnostic use.
Series CLS2 Capacitive Level Switch
Specifications - Installation and Operating Instructions
Bulletin L-26
SPECIFICATIONS
Service: Liquids, powder, and bulk materials compatible with wetted
materials.
Wetted Materials: 316 SS and Kynar
®
(PVDF).
Temperature Limits: Ambient: -40 to 185°F (-40 to 85°C), -4 to 185°F
(-20 to 85°C) with under 24 VAC/DC power supply. Process: -40 to
250°F (-40 to 121°C).
Pressure Limit: 365 psi (25 bar).
Enclosure Rating: Watertight/Corrosion Resistant, NEMA 4X.
Switch Type: DPDT (two form C).
Electrical Rating: 8A @ 120/240 VAC res., 30 VDC; 1/4 HP @ 120
VAC; 1/2 HP @ 240 VAC. UL approved rating: 8A @ 120/240 VAC
res., 1/2 HP @ 240 VAC.
Power Requirements: 12 to 240 VAC/DC.
Power Consumption: 2.8 Watts max.
Electrical Connection: 1/2˝ NPT conduit opening, screw termination
with removable terminal block.
Process Connection: 3/4˝ male NPT. Optional 1-1/4˝ male NPT; 1˝,
1-1/2˝ BSP; 1, 1-1/2˝, 2˝ sanitary.
Mounting Orientation: Vertical or horizontal.
Set Point Adjustment: Trips when product touches probe. Cut or
extend probe to length of desired trip point. Can be cut as short as 1˝
and can be extended by welding on to probe. (Minimum length will be
effected by material being sensed.).
Response Time: 0.2 seconds.
Time Delay: Adjustable, 0 to 60 seconds.
Spark/Static Protection: 1.0 MEG Ohm dissipation resistance with
spark gap. Surge current to 100A max.
Sensitivity: 8 Selectable settings, 1, 2, 4, 6, 8, 10, 14, 20 pF (at 30 pF
nominal free capacitance).
Environmental Conditions:
a) Pollution degree 2;
b) Indoor and outdoor use;
c) Altitude: 2000 meters max;
d) Humidity:
0 to 90% up to 104°F (40°C) non-condensing,
10 to 50% at 140°F(60°C) non-condensing.
e) Overvoltage category II
Agency Approvals: UL, CE.
PROXIMITY CONTROLS
Phone: 219/879-8000 www.dwyer-inst.com
A DIVISION OF DWYER INSTRUMENTS, INC.
Fax: 219/872-9057 e-mail: info@dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A.
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L-26:Series QV (F-87) 6/1/10 2:19 PM Page 1
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