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Brand: SICK
SICK CQ35-25NPP-KW1 CQ Capacitive Proximity Sensor
Description
CQ35-25NPP-KW1 is a SICK CQ capacitive proximity sensor (part no. 6020478) that detects solids, powders and liquids, including through non-metallic container walls. The catalogue summary lists: sensing range Sn: 4 mm … 25 mm; installation type: Non-flush; electrical wiring: DC 4-wire; connection type: Cable, 4-wire; switching output: PNP.
How the CQ35-25NPP-KW1 works and where it fits
Unlike inductive sensors it is not limited to metal: water, oil, plastics, wood, glass, grain and granules are all detectable. That makes the principle suited to level detection through the wall of a plastic or glass vessel, to fill-level checks in hoppers and silos, and to presence detection of non-metallic parts.
The reduction factors in the data sheet give the relative sensing distance for typical materials: for example metal and water are at 1, while PVC, oil, glass and wood are lower. Flush versions can be embedded in a holder up to the sensing face, non-flush versions need free space around the head and reach further, as the installation type row in the table shows.
Technical specifications
| Parameter | Specification |
|---|---|
| Type code | CQ35-25NPP-KW1 |
| Part number | 6020478 |
| Product family | CQ |
| Housing | Rectangular |
| Dimensions (W x H x D) | 35 mm x 69.5 mm x 15 mm |
| Sensing range Sn | 4 mm … 25 mm |
| Safe sensing range Sa | 18 mm |
| Installation type | Non-flush |
| Switching frequency | 50 Hz |
| Connection type | Cable, 4-wire, 2 m |
| Switching output | PNP |
| Switching output detail | PNP |
| Output function | Complementary |
| Electrical wiring | DC 4-wire |
| Adjustment: Potentiometer | Sensitivity (270°) |
| Enclosure rating | IP67 |
| Supply voltage | 10 V DC … 36 V DC |
| Voltage drop | ≤ 2.5 V DC |
| Current consumption | 10 mA |
| Time delay before availability | ≤ 100 ms |
| Reproducibility | ≤ 5 %; |
| Temperature drift (of Sr) | ± 10 % |
| Continuous current Ia | ≤ 200 mA |
| Power-up pulse protection | Yes |
| Ambient operating temperature | –25 °C … +75 °C |
| Housing material | Plastic, PC |
| Sensing face material | Plastic |
| MTTFD | 897 years |
| DCavg | 0 % |
| Metal | 1 |
| Declarations and certificates in the data sheet | EU declaration of conformity; UK declaration of conformity; Moroccan declaration of conformity; China RoHS; China Compulsory Product Certification (CCC) exempt; cULus certificate |
Selection and installation notes for CQ35-25NPP-KW1
For the control cabinet and the cable run, the relevant figures are outputs is PNP; current is 10 mA; frequency is 50 Hz; connection is cable, 4-wire, 2 m; supply is 10 V DC … 36 V DC; range is 4 mm … 25 mm.
For the mounting location, note housing of plastic, PC; operating temperature of –25 °C … +75 °C; vibration of 30 g, 11 ms / 10 … 55 Hz, 1 mm; enclosure rating of IP67; dimensions of 35 mm x 69.5 mm x 15 mm.
For installation, fit the sensor against the container wall or in the holder, set the sensitivity with the real medium, and test with an empty and a full vessel.
Typical uses are level limit switches for liquids and granules, detection of material behind sight windows and packaging, and counting of non-metallic parts.
Related SICK products: SICK MZC1-4V3PS-KR0 MZC1 C-Slot Cylinder Sensor, PNP, SICK MZT7-2V2PS-KU0 MZT7 Cylinder Sensor, SICK RZT7-03ZUS-KWB T-Slot Cylinder Sensor, SICK RZT7-03ZWS-KW0 RZT7 T-Slot Cylinder Sensor, Reed, AC/DC, SICK MZT8-03VPS-KP0 MZT8 T-Slot Magnetic Cylinder Sensor, PNP and SICK CM30-25NPP-EC1 CM Capacitive Proximity Sensor.
Documents and quotation
Attached to this page: the SICK data sheet for CQ35-25NPP-KW1, part no. 6020478, as published by SICK. Quotations are prepared by Seven Star LLC, an independent supplier in Muscat, once you send the part number, quantity and site through the RFQ form. Browse more in Sensors & Transmitters. Compare the complete type code with your existing unit and controller before ordering; the data sheet prevails if it differs from this page.
Datasheets & Documents
- Datasheet SICK CQ35-25NPP-KW1 official data sheet (part no. 6020478) Download
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About brand
SICK is the German maker of industrial sensors: photoelectric and proximity sensors, safety laser scanners and light curtains, encoders, distance sensors, code readers and gas analysers. Erwin Sick, an optics engineer, founded it in Munich in 1946, and in 1952 it introduced its first marketable accident-prevention light curtain, which protected press operators by stopping the machine when a hand broke the light beam. The company moved to Waldkirch in the Black Forest in 1956 and is still headquartered there. It is a privately held company, and has been an Aktiengesellschaft (AG) since 1996.
SICK company profile
| Founded | 1946, Munich, Germany, by Erwin Sick (1909–1988) |
|---|---|
| Headquarters | Waldkirch, Baden-Württemberg, Germany (since 1956) |
| Ownership | Privately held; after the founder's death in 1988 his widow Gisela Sick became the main shareholder. Legal form SICK AG since 1996 |
| Size | More than 12,000 employees and group revenue of about EUR 2.3 billion (company figures for 2023) |
| First breakthrough | Accident-prevention light curtain for presses, shown in Hanover in 1952 |
| International growth | First foreign subsidiary in France in 1972, United States in 1976; today sales and service companies worldwide |
| Product families | Photoelectric, inductive, capacitive, magnetic and ultrasonic sensors; safety laser scanners, light curtains, safety controllers and relays; encoders and motor feedback systems; distance sensors and LiDAR; barcode and 2D code readers and machine vision; gas analysers, dust and flow measurement for process and emissions monitoring |
Milestones
- 1946: Erwin Sick receives a licence to run his engineering firm in Munich.
- 1952: The first marketable accident-prevention light curtain is presented in Hanover and goes into series production.
- 1956: The company moves to Waldkirch with 25 employees.
- 1972 and 1976: Subsidiaries are founded in France and the United States.
- 1996: SICK becomes an Aktiengesellschaft.
- Today: Sensors for factory and logistics automation, machine safety and process analysis, with a large share of revenue outside Germany.
Choosing a SICK sensor
For object detection, the sensing principle comes first. A retro-reflective sensor (WL series) sends light to a reflector and switches when an object breaks the beam; it is reliable over long distances and easy to align. A sensor with background suppression (WTB series) detects an object at a set distance and ignores what is behind it, which suits conveyors with shiny or dark backgrounds. A through-beam pair (WS/WE) gives the longest range and the highest reliability in dust. For transparent bottles and film, use a model built for transparent objects (for example WL12G-3B or WL150-P420). The digits in the code also matter: "P" usually means a PNP output and "N" NPN, and the last digits set the connector or cable. For machine guarding, a safety laser scanner such as nanoScan3 or microScan3 protects an area, while a safety controller such as Flexi Soft combines several safety devices.
Where SICK products are used
In Oman and the GCC, SICK sensors are used in packaging and bottling lines, food and beverage plants, logistics and airport baggage handling, cement and steel plants, ports and cranes, automated warehouses, and on machines built by European OEMs. SICK safety scanners guard robots and automated guided vehicles, and its encoders give position feedback on motors, hoists and conveyors.
SICK products we list
| Family | Examples |
|---|---|
| Photoelectric sensors | WL12-3P2431, WTB12-3P2431, GTB6-P4211, VL18-4P3240, WL12G-3B2531, WS/WE100, KT5W contrast, W26 IO-Link |
| Proximity, cylinder and ultrasonic sensors | IME12-08NPSZC0S, IME18-05BPSZC0S, MZT8, UM18 4-20 mA, UM30, UFN3 fork |
| Machine safety | nanoScan3, microScan3, S300 Professional, Flexi Soft FX3-CPU1, FX3-XTIO, ReLy OSSD |
| Encoders and motor feedback | DFS60B, AFM60 PROFINET, AFS60 SSI, ATM60 PROFIBUS, SRS50, EFS50 |
| Distance sensors and code readers | DT50, DL50, DT35, Lector632 |
Ordering SICK products: what we need
Send the type code and the 7-digit SICK part number from the label (for example WTB12-3P2431 together with its part number). For a replacement sensor, add the output (PNP or NPN), connection (M8, M12 or cable) and sensing distance. For encoders, add the interface (incremental, SSI, PROFIBUS, PROFINET), resolution and shaft type. For safety scanners, tell us the model and whether the existing configuration needs to be kept.
Facts checked against SICK's published company history and annual figures, October 2026.
Browse SICK products by category: Sensors & Transmitters.
FAQ
Questions about the SICK CQ35-25NPP-KW1 CQ Capacitive Proximity Sensor
Answers from our engineering team on installation, compatibility and integration.
01What is the SICK CQ35-25NPP-KW1?
It is a SICK capacitive proximity sensor (CQ), part no. 6020478. The catalogue summary reads: Sensing range Sn: 4 mm ... 25 mm; Installation type: Non-flush; Electrical wiring: DC 4-wire; Connection type: Cable, 4-wire.
02What supply does the CQ35-25NPP-KW1 need?
Supply voltage is 10 V DC ... 36 V DC. Check the output and interface rows in the table for the signal levels.
03What protection rating and temperature range are given?
Enclosure rating: IP67. Ambient operating temperature: –25 °C ... +75 °C. Confirm both against the site before ordering.
04Does the page include the data sheet?
Yes. The official SICK data sheet for part no. 6020478 is attached as a PDF and linked on this page; where it differs from the page text, the data sheet applies.
05What should be confirmed before ordering the CQ35-25NPP-KW1?
Compare the full type code and part number 6020478 with the device being replaced, check supply, output or interface and mounting, and send the details through the RFQ form. Seven Star LLC is an independent supplier, not a SICK partner.
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