CJT inductive sensors provide contactless metal position detection in round PBT housings with two mounting tabs. Select the sensing distance and iron target size together, then choose a DC NPN/PNP three-wire circuit, DC two-wire circuit or AC two-wire circuit. A red LED indicates operation, and enclosure protection is IP67. When replacing a mechanical position switch, match the sensing arrangement, mounting clearance, switching circuit and load.
| Housing group | Nominal sensing distance | Setting distance | Standard iron target | Average DC response frequency |
|---|---|---|---|---|
| CJT36-07 | 7mm | 0-5.5mm | 50×50×1mm | 300Hz |
| CJT42-10 | 10mm | 0-7.5mm | 55×55×1mm | 200Hz |
| CJT48-15 | 15mm | 0-12.5mm | 60×60×1mm | 100Hz |
| CJT55-20 | 20mm | 0-15.5mm | 80×80×1mm |
Response frequency is an average measured with the standard sensing target, target spacing twice the standard target width and a sensing gap equal to half the nominal sensing distance. AC two-wire models have a specified average response frequency of 20Hz.
| Housing group | NPN models | PNP models | Supply |
|---|---|---|---|
| 36 | CJT36-07DNA CJT36-07DNB | CJT36-07DPA CJT36-07DPB | 10-30VDC |
| 42 | CJT42-10DNA CJT42-10DNB | CJT42-10DPA CJT42-10DPB | |
| 48 | CJT48-15DNA CJT48-15DNB | CJT48-15DPA CJT48-15DPB | |
| 55 | CJT55-20DNA CJT55-20DNB | CJT55-20DPA CJT55-20DPB |
| Housing group | DC two-wire, 10-30VDC | AC two-wire, 90-250VAC |
|---|---|---|
| 36 | CJT36-07DLA CJT36-07DLB | Not listed |
| 42 | CJT42-10DLA CJT42-10DLB | CJT42-10AKA CJT42-10AKB |
| 48 | CJT48-15DLA CJT48-15DLB | CJT48-15AKA CJT48-15AKB |
| 55 | CJT55-20DLA CJT55-20DLB | CJT55-20AKA CJT55-20AKB |
Final A identifies NO and final B identifies NC. N identifies NPN, P identifies PNP, L identifies DC two-wire and K identifies AC two-wire.
| Parameter | DC three-wire | DC two-wire | AC two-wire |
|---|---|---|---|
| Operating supply | 10-30VDC | 90-250VAC | |
| Leakage current | Maximum 10mA | Maximum 0.6mA | Maximum 10mA |
| Residual voltage | Maximum 1V | Maximum 3.5V | Maximum 10V |
| Control output | Maximum 200mA | ||
| Response frequency | 300Hz, 200Hz, 100Hz and 100Hz for 36, 42, 48 and 55 respectively, under the stated test conditions | 20Hz | |
| Hysteresis | Maximum 10% of sensing distance | ||
| Protection circuits | Surge, reverse polarity and overcurrent protection | Surge and overcurrent protection; bridge-rectified input shown in the circuit diagram | |
| Parameter | Specification |
|---|---|
| Temperature effect | Within ±10% of sensing distance over -25°C to +70°C, referenced to +20°C |
| Insulation resistance | At least 50MΩ at 500VDC |
| Dielectric strength | 1500VAC, 50/60Hz, for 1 minute |
| Vibration resistance | 1mm amplitude, 10-55Hz with a 1 minute cycle; 2 hours in each X, Y and Z direction |
| Shock resistance | 500m/s², approximately 50G; three shocks in each X, Y and Z direction |
| Indicator | Red operation LED |
| Operating temperature | -25°C to +70°C, without icing |
| Storage temperature | -30°C to +80°C, without icing |
| Ambient humidity | 35-95%RH, without condensation |
| Case | PBT |
| Standard cable | Gray PVC |
| Enclosure protection | IP67 |
| Housing group | Listed cable | Conductor construction |
|---|---|---|
| 36 and 42 | Ø3.8mm, three conductors, 2m | AWG22 designation; 25 strands of Ø0.1mm per conductor; Ø1.25mm insulation outside diameter |
| 48 and 55 | Ø4.8mm, three conductors, 2m | AWG22 designation; 30 strands of Ø0.1mm per conductor; Ø1.25mm insulation outside diameter |
Cable conductor count and the number of active circuit connections are separate. The two-wire diagrams use brown and blue leads; they do not assign another core to an output or protective earth. Specify the complete cable termination for the selected assembly.
| Position | Selection | Code | Meaning and limits |
|---|---|---|---|
| 1 | Classification | CJ | Inductive proximity sensor |
| 2 | Shape | T | Disc housing |
| 3 | Size | 36, 42, 48, 55 | 36mm, 42mm, 48mm and 55mm disc diameters |
| 4 | Product version | Omitted | Standard form |
| 5 | Distance | 07, 10, 15, 20 | 7mm, 10mm, 15mm and 20mm respectively, with the model-specific setting ranges above |
| 6 | Supply | A | 90-250VAC |
| D | 10-30VDC | ||
| E | 20-60VDC configuration | ||
| J | 5-10VDC configuration | ||
| 7 | Output circuit | N | NPN |
| P | PNP | ||
| K | AC two-wire | ||
| L | DC two-wire | ||
| 8 | Output state | A | NO |
| B | NC | ||
| C | Combined NO+NC configuration; no complete C-suffix model is included in the selection tables above | ||
| 9 | Connection | Omitted | Cable with free leads |
| M | Direct M12 straight four-pin A-coded connector | ||
| M plus connector-selection code | M-type cable connector | ||
| D plus connector-selection code | DT-type connector | ||
| A plus connector-selection code | AMP-type connector | ||
| S plus connector-selection code | SM-type connector | ||
| 10 | Cable material | Omitted | PVC |
| U | PUR | ||
| VP | Shielded PVC | ||
| UP | Shielded PUR | ||
| 11 | Cable length | L1-L5 | L1 = 1m, through L5 = 5m; other lengths can be specified. Standard cables are 2m. |
Specify a complete compatible configuration for alternative supplies, connectors and combined outputs.
| Model group | Disc diameter | Overall tab span | Mounting-hole spacing | Mounting holes and cable |
|---|---|---|---|---|
| CJT36-07 | 36mm | 53mm | 44.4mm | Two Ø4.4mm holes; Ø3.8mm cable |
| CJT42-10 | 42mm | 65.8mm | 53.4mm | Two Ø5.8mm holes; Ø3.8mm cable |
| CJT48-15 | 48mm | 74.6mm | 61.4mm | Two Ø5.8mm holes; Ø4.8mm cable |
| CJT55-20 | 55mm | 82.7mm | 67.8mm |
The attachment shows the cable outlet, mounting orientation and indicator position for each size.
| Circuit | Supply and leads | Load connection |
|---|---|---|
| DC NPN three-wire | Brown: positive supply Blue: 0V Black: output | Load between positive supply and black output |
| DC PNP three-wire | Load between black output and 0V | |
| DC two-wire | Brown and blue active leads | Load in series, in either lead |
| AC two-wire | Brown and blue active leads; 90-250VAC operating range. The connection illustration uses a 100-240VAC example. | Load in series, in either lead |
| Illustrated interface | Brown | Blue | Black | Selection note |
|---|---|---|---|---|
| PA10-U | Terminal 9, +12V | Terminal 10, GND | Terminal 11, IN1 | Three-wire connection example |
| PA-12 | Terminal 6 | Terminal 5 | Terminal 4 | Select the matching NPN/PNP setting on the interface |
These are external interface connection examples. Use the full circuit diagrams in the attachment and match the selected sensor's output and supply.
| Reference | Standard | Documentation |
|---|---|---|
| CCC | GB/T 14048.10 | Obtain model-specific documentation for the chosen circuit and configuration. |
| TUV | EN 60947-5-2 | |
| CE |
| Utilization category | Reference rating | Supply distinction |
|---|---|---|
| AC-140 | 200mA at 24-250VAC | The listed AC operating range is 90-250VAC |
| DC-13 | 200mA at 10-30VDC | Operating range of the listed DC models |
The range is intended for ordinary industrial control. Nuclear, gas or power systems requiring exceptional reliability, personal-safety functions, harsh outdoor or contaminated environments, fire or explosion hazards, military use and aerospace require a specifically designed and confirmed configuration.
