CAPACITIVE SENSORS
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GENERAL INFORMATIONS CAPACITIVE SENSORS Capacitive sensors detect the presence of any object into the sensible area. They have a higher sensitivity detecting metal objects or materials with a high content of water which have a high dielectric constant. WORKING PRINCIPLE An electrostatic field is generated in the sensible area. When an object gets in the sensing area changing its capacitive value, the oscillator stage starts oscillating, creating a commutation of the output stages. It’s possible to adjust the sensing distance of capacitive sensors operating on the potentiometer placed on the back plastic cap or laterally in the connector versions. The factory regulation is the maximum value of the range declared on the catalogue. BDC Electronic - Viale Lidice, 37/39 - 10095 Grugliasco (To) - Italy -Tel. (+39)011.31.49.021/022 Fax (+39) 011.31.49.023 - www.bdcelectronic.com - E-mail:bdc@bdcelectronic.com

HOW TO INTERPRETE THE ORDERING REFERENCES CAPACITIVE SENSORS = amplified a.c. = amplified d.c. = NOT amplified d.c. NAMUR series Diameter of cylindrical sensor. For other types, change the number with the following: P P = rectangular plastic 5 positions head 40 x 40 x 112 = flush mounting = non flush mounting = NAMUR series with 2 wires = NPN = PNP = 20 ÷ 240 V. for a.c. sensors = NO (normally open output) = NC (normally closed output) = NO + NC (complementary outputs) = NC (normally closed output on pin 2 of connector) = with connector M12 x 1 = standard type cable output = male connector...

CYLINDRICAL CAPACITIVE SENSORS IN METAL HOUSING NAMUR SERIES • Non-amplified in d.c. 2 wires • Cable output • Housing C-1 L5 L2 Typical curve I(mA) 4 3 2 1,65 1 D(mm) Sn (switching point) General Features: • Cable: 2 m PVC CEI 20 - 22 II; 90°C; 300 V; O.R. • Housing: nickel plated brass • Sensing face: plastic Capacitive sensors are suitable for any material detection. Some material, mostly if liquids, can be detected also through plastic or glass walls. They can be used for the most different applications: level controls on storage bin or tanks; detection of presence or filling of bottles;...

CYLINDRICAL CAPACITIVE SENSORS IN METAL HOUSING • Amplified in d.c. 4 wires • Cable output Housing C L5 L1 General Features: • Cable: 2 m PVC CEI 20 - 22 II; 90°C; 300 V; O.R. • Housing: nickel plated brass • Sensing face: plastic Capacitive sensors are suitable for any material detection. Some material, mostly if liquids, can be detected also through plastic or glass walls. They can be used for the most different applications: level controls on storage bin or tanks; detection of presence or filling of bottles; rain sensor; anti-vandalic key; etc. The adjustment of the sensing distance is...

CYLINDRICAL CAPACITIVE SENSORS IN METAL HOUSING Amplified in d.c. • Connector output M12 x 1 • Housing I-2 L5 L1 • Housing: • Sensing face: nickel plated brass plastic General Features: Capacitive sensors are suitable for any material detection. Some material, mostly if liquids, can be detected also through plastic or glass walls. They can be used for the most different applications: level controls on storage bin or tanks; detection of presence or filling of bottles; rain sensor; anti-vandalic key; etc. The adjustment of the sensing distance is possible through the potentiometer on the...

CYLINDRICAL CAPACITIVE SENSORS IN METAL HOUSING • Amplified in a.c. 2 wires + earth • Cable output Housing C L5 L1 • Cable: 2 m PVC CEI 20 - 22 II; 90°C; 300 V; O.R. • Housing: nickel plated brass • Sensing face: plastic General Features: Capacitive sensors are suitable for any material detection. Some material, mostly if liquids, can be detected also through plastic or glass walls. They can be used for the most different applications: level controls on storage bin or tanks; detection of presence or filling of bottles; rain sensor; anti-vandalic key; etc. The adjustment of the sensing...

CYLINDRICAL CAPACITIVE SENSORS IN PLASTIC HOUSING NAMUR SERIES - diameters 18 - 30 mm • Non-amplified in d.c. 2 wires • Cable output • Housing C-1 L5 L2 Typical curve I(mA) 4 3 2 1,65 1 D(mm) Sn (switching point) Capacitive sensors are suitable for any material detection. Some material, mostly if liquids, can be detected also through plastic or glass walls. They can be used for the most different applications: level controls on storage bin or tanks; detection of presence or filling of bottles; rain sensor; anti-vandalic key; etc. The adjustment of the sensing distance is possible through...

CYLINDRICAL CAPACITIVE SENSORS IN PLASTIC HOUSING • Amplified in d.c. 4 wires • Diameters 18 - 30 - 34 mm • Cable output Housing C-1 L5 L2 General Features: Capacitive sensors are suitable for any material detection. Some material, mostly if liquids, can be detected also through plastic or glass walls. They can be used for the most different applications: level controls on storage bin or tanks; detection of presence or filling of bottles; rain sensor; anti-vandalic key; etc. The adjustment of the sensing distance is possible through the potentiometer on the back cap close to the LED....

CYLINDRICAL CAPACITIVE SENSORS IN PLASTIC HOUSING Amplified in a.c. 2 wires • Diameters 18 - 30 mm • Cable output • Housing C-1 L5 L2 • Cable: 2 m PVC CEI 20 - 22 II; 90°C; 300 V; O.R. • Housing: plastic • Sensing face: plastic General Features: Capacitive sensors are suitable for any material detection. Some material, mostly if liquids, can be detected also through plastic or glass walls. They can be used for the most different applications: level controls on storage bin or tanks; detection of presence or filling of bottles; rain sensor; anti-vandalic key; etc. The adjustment of the...

RECTANGULAR CAPACITIVE SENSORS • 5 Position head • Amplified in d.c. • Terminal block output 40 Connecting diagram LED power + General Features: • Housing: • Terminal block cover: plastic polycarbonate These sensors are called “turnable sensing head” because the sensing head, inside the plastic housing can be positioned on 5 different positions. To choose the desired sensing face it is enough to remove the cover and set the sensing head in the proper position. The internal terminal block can be easily reached by removing the transparent cover. Being capacitive, they are suitable for any...