The IFM KB0029 is a cylindrical capacitive sensor designed for non-contact detection in industrial applications. It provides an adjustable 3 to 20 mm sensing range for accurate material detection. The sensor uses a normally closed AC/DC switching output. Its increased noise immunity supports stable operation in electrically demanding environments. A 2 m PVC cable provides a straightforward two-wire connection.
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The KB0029 detects suitable materials through capacitive measurement without mechanical contact. Its sensing range can be adjusted between 3 and 20 mm. The real sensing range is 20 ±10%, while the operating distance is 0 to 16.2 mm. Material correction factors are specified for glass, water, ceramics and PVC. This provides flexibility for level and presence detection.
The sensor provides a normally closed output for control circuits requiring inverse switching behavior. It operates from 20 to 250 V AC/DC and supports 200 mA continuous current. The maximum voltage drop is 8 V on DC and 10 V on AC. Switching frequency is 25 Hz on AC and 40 Hz on DC. External protection is required because short-circuit and overload protection are not integrated.
The KB0029 uses a cylindrical PBT housing measuring Ø34 × 81 mm. It is designed for non-flush installation and includes a yellow switching-status LED. IP65 protection supports industrial installation. The operating temperature range is -25 to 70°C. The sensor is supplied with a 2 m PVC cable containing two 0.5 mm² conductors.
3...20 mm adjustable sensing range
Normally closed output
20...250 V AC/DC
Two-wire technology
25 Hz AC switching frequency
40 Hz DC switching frequency
200 mA continuous current
Adjustable sensing range
Yellow LED
PBT housing
Ø34 × 81 mm format
Non-flush mounting
IP65 protection
Increased noise immunity
2 m PVC cable
2 × 0.5 mm² conductors
Material correction factors
Compact cylindrical construction
Liquid level monitoring
Dry material detection
Tank level sensing
Container monitoring
Packaging systems
Filling machines
Material presence detection
Conveyor systems
Process equipment
Industrial automation
The normally closed output is useful in control architectures that require an inverse switching state. The two-wire AC/DC configuration allows integration into a wide range of control circuits. The adjustable sensing range provides commissioning flexibility. The 2 m cable reduces the need for immediate cable extensions. The yellow LED supports quick status verification during setup.
The PBT housing is designed for industrial sensor installation. IP65 protection helps protect against dust and water ingress. Increased immunity improves stability in environments with conducted RF interference. The sensor supports both AC and DC supply systems. External fuse protection should be provided according to the specified installation requirements.
| Specification | KB0029 |
|---|---|
| Product type | Capacitive sensor |
| Order code | KB-2020-BBOA/NI |
| Measuring principle | Capacitive |
| Electrical design | AC/DC |
| Output function | Normally closed |
| Technology | Two-wire |
| Sensing range | 3...20 mm |
| Factory setting | 20 mm |
| Real sensing range Sr | 20 ±10% |
| Operating distance | 0...16.2 mm |
| Hysteresis | 1...15% of Sr |
| Switch-point drift | -15...15% |
| Glass correction factor | 0.4 |
| Water correction factor | 1 |
| Ceramics correction factor | 0.2 |
| PVC correction factor | 0.2 |
| Operating voltage | 20...250 V AC/DC |
| Protection class | II |
| Reverse polarity protection | No |
| Max. voltage drop DC | 8 V |
| Max. voltage drop AC | 10 V |
| Minimum load current | 5 mA |
| Leakage current | 2.5 / 1.7 / 1.5 mA |
| Continuous AC current | 200 mA |
| Continuous DC current | 200 mA |
| Short-time current | 1500 mA |
| Switching frequency AC | 25 Hz |
| Switching frequency DC | 40 Hz |
| Short-circuit protection | No |
| Overload protection | No |
| Ambient temperature | -25...70°C |
| Protection rating | IP65 |
| Housing | PBT cylindrical |
| Dimensions | Ø34 × 81 mm |
| Mounting | Non-flush |
| Weight | 258.5 g |
| Cable | 2 m PVC, 2 × 0.5 mm² |
| Indicator | Yellow LED |
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