
LJ12A3-4-Z BX Proximity Sensor RUIZHI Pack of 5 LJ12A3-4-Z Switch Sensor/Switch Inductive Metal Inductive NPN Normally Open 3-Core DC 6-36V Compatible with Arduino
LJ12A3-4-Z BX Proximity Sensor RUIZHI Pack of 5 LJ12A3-4-Z Switch Sensor/Switch Inductive Metal Inductive NPN Normally Open 3-Core DC 6-36V Compatible with Arduino
LJ12A3-4-Z BX Proximity Sensor RUIZHI Pack of 5 LJ12A3-4-Z Switch Sensor/Switch Inductive Metal Inductive NPN Normally Open 3-Core DC 6-36V Compatible with Arduino
Detection principle: After switching on, the high frequency oscillator of the sensor creates an alternating electromagnetic field on its detection surface. As a metal object approaches, eddy currents absorb some of the field energy, causing a drop in oscillator power and triggering the NPN closer output. This construction ensures fast, accurate and safe detection. Details: Product model: LJ12A3-4-Z/BX Operating voltage: 6-36 VDC. Detection distance: 0-4 mm. Load current: <300 mA. Output shape: NPN three-wire (not buried). Output status: normally open (NO) Output level: low level (if metal is present). Detecting fabric: metal. Material: Copper/PBT External cable: 1.2 m. Output indicator: LED (Red) Dimensions: 12 mm diameter, 40 mm thread length, 60 mm total length. Features 1. Hysteresis distance: <10% detection distance. 2. Power consumption: <13 mA. 3. Protection function: reverse polarity protection, surge protection, load short circuit protection 4. Use of the environment: -30C to +70C / -30% to +95% RH. 5. Insulation impedance: >50MQ. 6. Temperature effects: temperature range -30C to +65C, within 15% of the detection range. 7. Voltage influences: rated supply voltage range within 15%, effect on the detection distance of the switch of 10%; the supply voltage exceeds the rated voltage +15%, which will damage the opening time 8. Design Structure: IP67 (IEC Specification) Pin Description: Brown: VCC; Blue: GND; Black: Signal Advantages: ✔️ Easy to install and use. ✔️ Accurate and reliable detection. ✔️ Robust and durable. Product includes: 5 x LJ12A3-4-Z BX inductive proximity sensor
Product Features
- Precise metal detection: NPN NO output with 0-4 mm detection range reliably detects ferrous metals. Low-level output signal ensures compatibility with PLCs and industrial controls. (15% distance stability)
- Industrial-grade durability: copper/PBT housing withstands extreme temperatures from -30C to +70C. IP67 protection resists water/dust. 40mm brass thread for secure mounting in harsh environments.
- Protection: LJ12A3-4-Z inductive proximity sensor with built-in protection against reverse polarity/short circuit/overvoltage (max. 300mA) <13mA low consumption with LED status indicator. 1.2m flexible cable for easy wiring.
- Plug & Play installation: pre-wired 3-core cable (brown VCC, blue GND, black signal). LJ12A3-4-Z/BX switch sensor 12 mm compact design fits in tight spaces.
- Compatible with Arduino The inductive proximity sensor LJ12A3-4-Z BX is equipped with a red LED indicator and a 1.2m cable for easy integration with Arduino.
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LJ12A3-4-Z BX Proximity Sensor RUIZHI Pack of 5 LJ12A3-4-Z Switch Sensor/Switch Inductive Metal Inductive NPN Normally Open 3-Core DC 6-36V Compatible with Arduino
LJ12A3-4-Z BX Proximity Sensor RUIZHI Pack of 5 LJ12A3-4-Z Switch Sensor/Switch Inductive Metal Inductive NPN Normally Open 3-Core DC 6-36V Compatible with Arduino
Detection principle: After switching on, the high frequency oscillator of the sensor creates an alternating electromagnetic field on its detection surface. As a metal object approaches, eddy currents absorb some of the field energy, causing a drop in oscillator power and triggering the NPN closer output. This construction ensures fast, accurate and safe detection. Details: Product model: LJ12A3-4-Z/BX Operating voltage: 6-36 VDC. Detection distance: 0-4 mm. Load current: <300 mA. Output shape: NPN three-wire (not buried). Output status: normally open (NO) Output level: low level (if metal is present). Detecting fabric: metal. Material: Copper/PBT External cable: 1.2 m. Output indicator: LED (Red) Dimensions: 12 mm diameter, 40 mm thread length, 60 mm total length. Features 1. Hysteresis distance: <10% detection distance. 2. Power consumption: <13 mA. 3. Protection function: reverse polarity protection, surge protection, load short circuit protection 4. Use of the environment: -30C to +70C / -30% to +95% RH. 5. Insulation impedance: >50MQ. 6. Temperature effects: temperature range -30C to +65C, within 15% of the detection range. 7. Voltage influences: rated supply voltage range within 15%, effect on the detection distance of the switch of 10%; the supply voltage exceeds the rated voltage +15%, which will damage the opening time 8. Design Structure: IP67 (IEC Specification) Pin Description: Brown: VCC; Blue: GND; Black: Signal Advantages: ✔️ Easy to install and use. ✔️ Accurate and reliable detection. ✔️ Robust and durable. Product includes: 5 x LJ12A3-4-Z BX inductive proximity sensor
Product Features
- Precise metal detection: NPN NO output with 0-4 mm detection range reliably detects ferrous metals. Low-level output signal ensures compatibility with PLCs and industrial controls. (15% distance stability)
- Industrial-grade durability: copper/PBT housing withstands extreme temperatures from -30C to +70C. IP67 protection resists water/dust. 40mm brass thread for secure mounting in harsh environments.
- Protection: LJ12A3-4-Z inductive proximity sensor with built-in protection against reverse polarity/short circuit/overvoltage (max. 300mA) <13mA low consumption with LED status indicator. 1.2m flexible cable for easy wiring.
- Plug & Play installation: pre-wired 3-core cable (brown VCC, blue GND, black signal). LJ12A3-4-Z/BX switch sensor 12 mm compact design fits in tight spaces.
- Compatible with Arduino The inductive proximity sensor LJ12A3-4-Z BX is equipped with a red LED indicator and a 1.2m cable for easy integration with Arduino.
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Description
LJ12A3-4-Z BX Proximity Sensor RUIZHI Pack of 5 LJ12A3-4-Z Switch Sensor/Switch Inductive Metal Inductive NPN Normally Open 3-Core DC 6-36V Compatible with Arduino
Detection principle: After switching on, the high frequency oscillator of the sensor creates an alternating electromagnetic field on its detection surface. As a metal object approaches, eddy currents absorb some of the field energy, causing a drop in oscillator power and triggering the NPN closer output. This construction ensures fast, accurate and safe detection. Details: Product model: LJ12A3-4-Z/BX Operating voltage: 6-36 VDC. Detection distance: 0-4 mm. Load current: <300 mA. Output shape: NPN three-wire (not buried). Output status: normally open (NO) Output level: low level (if metal is present). Detecting fabric: metal. Material: Copper/PBT External cable: 1.2 m. Output indicator: LED (Red) Dimensions: 12 mm diameter, 40 mm thread length, 60 mm total length. Features 1. Hysteresis distance: <10% detection distance. 2. Power consumption: <13 mA. 3. Protection function: reverse polarity protection, surge protection, load short circuit protection 4. Use of the environment: -30C to +70C / -30% to +95% RH. 5. Insulation impedance: >50MQ. 6. Temperature effects: temperature range -30C to +65C, within 15% of the detection range. 7. Voltage influences: rated supply voltage range within 15%, effect on the detection distance of the switch of 10%; the supply voltage exceeds the rated voltage +15%, which will damage the opening time 8. Design Structure: IP67 (IEC Specification) Pin Description: Brown: VCC; Blue: GND; Black: Signal Advantages: ✔️ Easy to install and use. ✔️ Accurate and reliable detection. ✔️ Robust and durable. Product includes: 5 x LJ12A3-4-Z BX inductive proximity sensor
Product Features
- Precise metal detection: NPN NO output with 0-4 mm detection range reliably detects ferrous metals. Low-level output signal ensures compatibility with PLCs and industrial controls. (15% distance stability)
- Industrial-grade durability: copper/PBT housing withstands extreme temperatures from -30C to +70C. IP67 protection resists water/dust. 40mm brass thread for secure mounting in harsh environments.
- Protection: LJ12A3-4-Z inductive proximity sensor with built-in protection against reverse polarity/short circuit/overvoltage (max. 300mA) <13mA low consumption with LED status indicator. 1.2m flexible cable for easy wiring.
- Plug & Play installation: pre-wired 3-core cable (brown VCC, blue GND, black signal). LJ12A3-4-Z/BX switch sensor 12 mm compact design fits in tight spaces.
- Compatible with Arduino The inductive proximity sensor LJ12A3-4-Z BX is equipped with a red LED indicator and a 1.2m cable for easy integration with Arduino.




















