The Balluff BUS004J (full order code: BUS R06K1-XB-02/015-S75G) is a compact ultrasonic sensor in a block-style (cubic) housing. It provides reliable, non-contact distance measurement or object detection, ideal for fill level monitoring, height/sag measurement, position detection, and presence sensing in solid, powdery, or fluid media.
Key Specifications
- Sensing Range: 20–250 mm (blind zone: 20 mm; rated operating distance Sn: 150 mm; max range refers to a good reflector like a ø10 mm tube or aligned plate)
- Analog Output: 4–20 mA (current output, linear rising or falling characteristic, load RL ≤ 500 Ω)
- Resolution: ≤ 0.056 mm
- Repeat Accuracy: ±0.15 % FS
- Response Time: max. 24 ms
- Ultrasonic Frequency: 380 kHz
- Operating Voltage: 20–30 V DC (rated 24 V DC), reverse polarity protected, no-load current < 25 mA
- Temperature Compensation: Yes (internal)
- Synchronization: External (via pin 2, supports multiple sensors)
- Ambient Temperature: –25…+70 °C (storage: –40…+85 °C)
- Protection Rating: IP67
- Housing: Block style, dimensions approx. 12 × 42.5 × 21.6 mm, weight ~10–150 g (varies by source)
- Housing Material: ABS (nickel-plated in some descriptions)
- Sensing Surface: PU foam / epoxy resin / glass
- Connection: 4-pin M8 male connector (S75)
- Adjustment: Single teach-in push-button (for window limits, rising/falling characteristic, key lock, factory reset)
- Indicators: Green LED (power/operation), Yellow LED (object in range/output state)
- Approvals: CE, UKCA, cULus, WEEE
Pin Assignment (M8 4-pin, view on sensor)
- Pin 1 (brown): +UB (20–30 V DC)
- Pin 2 (white): Sync (synchronization input)
- Pin 3 (blue): 0 V (GND)
- Pin 4 (black): Analog output (4–20 mA)
Features and Setup Notes
- Teach-in Functions — Use the button to set measurement windows, choose rising or falling output curve, lock the button, or reset to factory settings (factory default: rising characteristic across the full range). Avoid using pointed tools on the button.
- Mounting — Uses M3 screws or included mounting plate (max torque 0.5 Nm).
- Applications — Excellent for challenging environments where optical sensors may fail (e.g., dusty, transparent, or reflective materials). It works contactlessly on granules, liquids, powders, etc.
- Notes — Optimum accuracy after ~30 min warm-up due to self-heating. Clean the sensing surface if soiled. The sensor supports external synchronization to avoid crosstalk between multiple units.
