Proximity CTF Data sheet

Model

HEX1/5˝

1˝ NPT

3-15/16

[100.00]

1-3/16

[30.00]

4-9/64

[105.00]

Ø1-1/2

[38.00]

1˝ NPT

3-5/16

[84.00]

4-9/64

[105.00]

63/64

[25.06]

25/32

[19.99]

CTF

Mini Tuning Fork Level Switch

Compact, Cost Effective, DIN Connection

LEVEL

Level Switches,

The Model CTF Mini Tuning Fork Level Switch is an ideal choice for level control for

powders. The CTF incorporates a piezoelectric crystal that vibrates the fork at its natural
frequency. When the fork comes in contact with a material, the vibration is dampened and
the switch changes state. As the material is removed from the fork, the switch changes
back to its normal state. The unit is not affected by vibration from conveying systems,
motors , or the movement of material. Its compact size and DIN connection allow for
application in places a larger tuning fork level switch may not be suitable, providing great
versatility.

The Model CTF is easy to use with no calibration required, and no mechanical moving
parts mean no routine maintenance. The CTF is not affected by the dielectric constant of
the sensed material, making it super ior to a compar able capacita nce level switch for
applications where the dielectric constant is low, more than one material is being used in
the single vessel, and when material moisture content can change. The level switch is also
great for applications when the bulk density is too low for a rotating paddle level switch,
making it the ideal choice for low density bulk solids and liquids. Comes standard with a
user friendly PNP/NPN configurable output.

APPLICATIONS

Lime, styrofoam, tobacco, dry cereals, sugar, animal feed, milk powder, flour,

Tuning Fork

insulation, cement, paper shavings, plastic granules, sawdust, carbon black, light
fibers, detergent powders, dyes, chalk, silica, sand, wood chips.

336

DWYER INSTRUMENTS, INC. | www.dwyer-inst.com

SPECIFICATIONS
Service: Dry powder compatible with

wetted materials. Can detect bulk
materials submerged in liquid.
Sensitivity: Min. bulk solid density: 4.4

3

(70 g/l).

lb/ft
Wetted Materials: 304 SS and 316L
SS.

Temperature Limits:

Ambient: -40 to 140°F (-40 to 60°C);
Process: -40 to 212°F (-40 to 100°C).

Pressure Limit: 600 psi (40 bar).
Power Requirement: 12 to 55 VDC.

Model CTF-01, Mini Tuning Fork Level Switch

Power Consumption: 10 mA @ 12 to

24 VDC; 0.5 W (max.).

Enclosure: Aluminum, painted.
Enclosure Rating: IP65.
Switch Type: 3-wire PNP/NPN output.
Electrical Rating: 350 mA (max) @ 12

to 55 VDC.
Conduit Connection: Valve plug DIN

43650.

Process Connections: 1˝ male NPT.
Indication Lights: External red LED.
Sensing Delay: Max. covered probe: 1

to 3 s.; Uncovered probe: 1 to 3 s.

Weight: 2.2 lb (1.0 kg).