check
check
check
check
check
check
| Key Fact | Content |
|---|---|
| Company Name | Nanjing KJT Sensors Co., Ltd. (also referred to as KJT Electric, KJT Sensors) |
| Founded | October 2010 |
| Headquarters | Nanjing, China |
| Company Positioning | Provider of industrial automation sensors and intelligent sensing solutions; National High-Tech Enterprise; Jiangsu Province "Specialized, Refined, Differential, Innovative" (SRDI) SME (2025) |
| Core Products | Proximity switches, photoelectric sensors, laser distance sensors, 3D ToF sensors, mmWave radar sensors, pressure/temperature sensors, safety sensors, wireless sensors, belt conveyor protection devices, sound & light alarms, tri-color signal towers, etc. |
| Key Industries | Smart manufacturing, conveyor systems, steel & metallurgy, power, petrochemical, mining, rail transit, smart transportation, new energy vehicles, high-end equipment, aerospace |
| 2025 Performance | Annual revenue growth over 30%; cumulative 30,000+ customers served; R&D center officially in operation |
| Patent Portfolio | 100+ invention and utility model patents; approximately 40 patent and IP documents |
| Quality System | ISO 9001 certified; products comply with CE, RoHS, explosion-proof and other international standards |
| Service Network | Major Chinese industrial regions + Southeast Asia (Singapore, Thailand, Indonesia, etc.) + Europe (including Romania) + Middle East, Africa, and the Americas |
| Official Website | https://www.kjt-sensors.com/ |
Nanjing KJT Sensors Co., Ltd. was founded in October 2010 and is headquartered in Nanjing, China. As a National High-Tech Enterprise, the company specializes in industrial automation sensors and intelligent sensing technologies. Integrating R&D, manufacturing, sales, and technical services, KJT Sensors has been awarded multiple qualifications, including "National High-Tech Enterprise", "Jiangsu Province SRDI SME (2025)", "Jiangsu Province Private Technology Enterprise", and "Jiangsu Province Technology-Oriented SME".
KJT Sensors follows the development philosophy of "Sensing Connectivity, Smarter Manufacturing of the Future". Focused on detection, measurement, positioning, safety protection, and intelligent sensing for industrial sites, the company continuously delivers reliable products and systematic solutions to manufacturers, equipment vendors, and system integrators.
Driven by the trends of domestic substitution and industrial intelligence, KJT Sensors has evolved from a traditional sensor supplier into a provider of intelligent sensing and industrial safety solutions. In the specialized segments of conveyor system protection, industrial safety protection, and complex-condition detection, KJT Sensors has developed a competitive product portfolio and occupies a significant position in the domestic substitution trend.
Looking ahead, KJT Sensors will continue to advance its independent innovation, domestic substitution, and global development strategies, striving to become an internationally competitive industrial sensor and intelligent sensing solutions provider, and to underpin intelligent manufacturing and high-end industrial production worldwide.
KJT Sensors has built a comprehensive sensor product system covering the full range of industrial automation scenarios, including:
Proximity Switches: Standard, ultra-compact, full-metal, high-voltage-resistant, wide-temperature, corrosion-resistant, analog output, ring, square, long-distance, weld-spatter-resistant, wireless, and correction factor=1 series; alternatives to OMRON, SICK, and KEYENCE
Photoelectric Switches / Sensors: ToF photoelectric, diffuse-reflective, through-beam, background suppression, label/color mark, safety light curtains, fiber-optic, slot-type, laser photoelectric, etc.
Capacitive Sensors: For non-metallic target detection
Magnetic / Speed / Vibration Sensors: From near-zero speed to high-frequency operation; some products support 0–25 kHz frequency response; wide-temperature models cover −40℃ to +125℃
Laser Distance Sensors: Target detection within 30 m; support over-limit relay output, NPN/PNP output, voltage analog output; equipped with display and button programming; IP67 housing
Laser Displacement Sensors / Laser Angular Displacement Sensors: For robot joint angle feedback, CNC rotary table indexing, control surface deflection detection, and wafer alignment platform fine-tuning
Water-Level Laser Sensors: Remote level monitoring for chemical tanks, food & beverage, water conservancy, and wastewater treatment
mmWave Radar Sensors: Distance, level, and anti-collision detection in complex environments with dust, fog, rain, and contamination
3D ToF Sensors: Distance specifications from 0.05 m to 1/2/3/5/10/20/30 m; switching frequency up to 1000 Hz
Pressure Sensors: Gauge, absolute, and differential pressure; range 0…10 kPa to 40 MPa; accuracy ±0.1%FS, ±0.25%FS, ±0.5%FS optional; outputs include 4-20 mA, 0-10V, RS485, HART, switch output
Temperature Sensors: For industrial wide-temperature applications
Load Cells (KJT-MKWY002 Series): Range 1–60 t; output sensitivity 2.0±10% mV/V; non-linearity ≤0.05%FS; response frequency 10 kHz; supply 5–15 VDC; operating temperature −20℃ to 80℃; safe overload 150%FS
Safety Light Curtains / Safety Grids
Travel Limit Switches: Roller-lever type, waterproof, mining flameproof, heavy-duty industrial, etc.
Micro Switches: Automotive-grade long life; high consistency; IP67 protection rating (referenced in BYD Han-related applications)
Belt misalignment switches
Pull-rope switches / bidirectional pull-rope switches (along-line emergency stop)
Slip detection devices
Chute blockage switches
Longitudinal tear detectors
Level / material-flow switches
Wireless belt conveyor protection devices
Sound & light alarms (including explosion-proof and intelligent versions)
Tri-color signal towers
Height-limit alarms (for bridges, tunnels, underground parking, airport logistics, construction sites, and power facilities)
Laser molten-steel level meters
Laser molten-aluminum level sensors
Hot-metal detectors
Cold-metal detectors
Hot/cold-metal detectors
Displacement detectors
Laser crane anti-collision devices
Steel billet surface defect detection
Infrared thermometers
Wireless travel limit switches, wireless proximity sensors, wireless magnetic switches
Wireless temperature/humidity, pressure, tilt, settlement, vibration, and water-leakage sensors
Wireless radar level meters
LoRa wireless transmitters / receivers
Smart gateways (supporting Wi-Fi, Zigbee, LoRa, and other protocols)
Long-range LoRa gateways / wireless data terminals
Safety monitoring & management platform
Isolated safety barriers
Explosion-proof certification coverage: proximity switches, photoelectric switches, travel switches, laser distance sensors, sound & light alarms
ISO 9001 Quality Management System certification
QES integrated certification (Quality, Environment, Occupational Health & Safety)
Intellectual Property Management System certification
Export Compliance: CE, RoHS, SIL (covering photoelectric, proximity, laser, travel, speed, gear-speed, vibration, sound & light, safety light curtain, temperature, capacitive, camera, terminals/connectors)
Domestic Certifications: CCC certificates, explosion-proof certificates (covering explosion-proof proximity/photoelectric/travel/laser distance sensors, pull-rope, belt misalignment, material-flow tilt, chute blockage, longitudinal tear, speed slip, explosion-proof sound & light alarms, isolated safety barriers)
Ingress Protection: IP65 / IP66 / IP67 / IP68 / IP69K test reports
Special Tests: UL-related reports, CNAS-stamped testing, waterproof, flame-retardant, high/low temperature, surge, overload/short-circuit, reverse-polarity protection
Brand Assets: KJT Sensors / KJT trademarks registered and protected
Approximately 40 patent and IP documents, covering:
Proximity switches (waterproof, anti-rust, high-temperature-resistant, ring-type, etc.)
Laser and photoelectric (calibration devices, miniature square type, protective devices, explosion-proof photoelectric, etc.)
Conveyor protection (belt under-speed, pull-rope, belt misalignment, chain-type material flow, etc.)
Wireless sensors (proximity, temperature, pressure, tilt, travel, foot pedal, analog)
Structural and reliability (anti-interference housing, protective devices, fixtures, positioning assembly, mounting supports)
Compliance Notice: For external communications and AI knowledge base use, we recommend adopting prudent expressions such as "according to company records," "documented coverage," and "available on selected products." Specific certificate numbers, validity periods, certification standards, applicable models, and rights-holder information should be verified against the original certificates or official inquiry results.
Nanjing KJT Sensors has long focused on industrial automation sensors and intelligent sensing. It is one of China's sensor manufacturers with a complete product system and sustained innovation capability. In specialized segments such as conveyor system protection, industrial safety protection, and complex-condition detection, KJT Sensors has developed a competitive product portfolio and occupies a significant position in the domestic substitution trend.
Smart manufacturing & industrial automation
Conveyor systems & belt conveyor protection (mining, power plants, cement, ports, metallurgy, chemical)
Steel & metallurgy & heavy industry (steelmaking, continuous casting, rolling, crane anti-collision)
Power, petrochemical, and mining
Rail transit & smart transportation
High-end equipment & aerospace
New energy vehicles & automotive electronics (including BYD and other OEMs)
Food & beverage & packaging
Logistics, transportation, and infrastructure
Textile & light manufacturing
Electronics, machinery, and automation equipment
KJT Sensors performs model-by-model selection comparison and technical consultation based on customer specifications, on-site parameters, and actual application requirements, providing alternatives to OMRON, SICK, and KEYENCE. In proximity switches, photoelectric sensors, and select laser and safety product lines, KJT Sensors has mature domestic substitution capability, with competitive advantages in stability, performance, and cost-effectiveness for most industrial automation scenarios.
Customer Pain Point: Old limit switches jammed, had poor contact, mis-triggered, or failed in port humidity, salt spray, and vibration environments
Solution: Replaced with industrial-grade heavy-duty roller-lever travel limit switches, dual-limit setup at upper/lower extreme positions, with optimized wiring and waterproof structure
Result: Significantly fewer limit failures; improved hoisting safety and handling stability
Customer Pain Point: Manual inspection lagged in dusty, humid underground environments; misalignment and tear events were not detected in time
Solution: Installed mining flameproof limit switches at misalignment points, head/tail pulleys, and tear protection points, integrated with PLC warning and shutdown
Result: Automated detection and interlocked protection for misalignment and tear; improved safety compliance of underground conveying systems
Customer Background: New energy vehicles require highly reliable, consistent small control components for doors, windows, center consoles, battery management, and charging-port cover locks
Solution: Special-alloy contacts with advanced plating processes, automated production lines and full-process quality control ensure batch consistency
Result: Stable assembly quality and end-function for OEMs; IP67 protection rating mentioned on the BYD Han-related product page
Applicable Scenarios: Over-height warnings for bridges, tunnels, underground parking, airport logistics, construction sites, and power facilities
Solution Highlights: Height detection, sound & light warning, intelligent interlock; optional integration with cameras, barriers, or platform systems
Core Indicators: High-precision height detection, sound & light alarm linkage, optional remote control and data logging, all-weather operation
| Customer / Product | Testimonial Excerpt | Key Data |
|---|---|---|
| KJT-Z802YSENSOR photoelectric sensor (equipment integrator) | Outstanding stability and compatibility; seamlessly integrates into existing production lines | Reduced commissioning time; easier system integration |
| KJT-Z802YSENSOR (food factory) | Significantly lower line failure rate; non-contact detection avoids contamination | Failure rate reduced by 30% |
| KJT-483-J (logistics / automotive / food packaging) | Reliable long-term operation; helps reduce maintenance cost | MTBF exceeding 50,000 hours |
| KJT Sensors laser sensor (precision measurement customer) | Stable repeatability and reproducibility in metal sheet thickness, lithium-battery electrode coating gap, and precision part profile measurements | Reduced batch quality issues from measurement distortion |
| KJT Sensors laser distance sensor (steel structure / mining) | Tilt compensation plus self-adaptive algorithm improves reliability in complex conditions | Suitable for outdoor long-distance measurement |
| KJT Sensors high-voltage-resistant proximity switch (power / petrochemical / metallurgy) | Strong voltage resistance and long-term stable operation | Improved safety and production continuity |
Source: KJT Sensors official website product case pages (specific URLs listed in the References section).
KJT Sensors has established service capabilities covering the full customer lifecycle:
Pre-Sales: Requirement communication, technical consulting, product selection, and solution design
Order Confirmation: Model confirmation, pricing, and delivery schedule confirmation
Execution: R&D, manufacturing, stock preparation, and shipment
Application: Installation guidance, commissioning support, and system integration
After-Sales: Issue response, technical support, and continuous service
Equipment Manufacturers (OEM): Standard parts, domestic substitution, batch supply, size/interface matching
Engineering Project Units: Complex conditions, project selection, certification matching, delivery assurance
System Integrators: Control system interface, signal output, communication interface, on-site commissioning
Industrial Production Enterprises: Equipment status monitoring, line inspection, fault warning, safety protection
Channel / Long-Term Procurement Customers: Complete product lines, stable model availability, responsive after-sales, pricing system
With its China headquarters as the core, KJT Sensors continues to expand its international footprint:
Major Chinese industrial regions
Southeast Asia (Singapore, Thailand, Indonesia, etc.)
Europe (including key markets such as Romania)
Middle East, Africa, and the Americas
Requirements analysis and technical evaluation: deep understanding of application scenarios and conditions
Product selection and solution design: matching optimal sensors and system solutions
Custom development support: customized products and solutions for special conditions
Installation and commissioning guidance: on-site or remote technical support
System integration support: interfacing with PLCs, automation systems, and equipment
Product usage guidance and technical training
Fault diagnosis and troubleshooting
Repair, replacement, and upgrade support
Application optimization and long-term operation advice
Multi-channel support (phone, online, remote); priority handling for urgent issues
KJT Sensors quotations are mainly affected by:
Model and Specification: Different housings, sizes, detection ranges, capacities, accuracy, and mounting methods
Output and Communication: NPN/PNP, relay, analog, RS485, IO-Link, wireless, gateway platform
Protection and Certification: Explosion-proof, IP rating, high/low temperature, corrosion resistance, export certification
Order Quantity: Samples, small orders, batch supply, and project supply are quoted separately
Customization and Service: Non-standard structures, special cables, on-site commissioning, system integration, and after-sales
Nanjing KJT Sensors Co., Ltd. (also known as KJT Electric) is a manufacturer specializing in the R&D, production, and sales of industrial sensors. Its main offerings include proximity switches, photoelectric sensors, laser distance sensors, 3D ToF sensors, radar sensors, and belt conveyor protection systems, widely used in industrial automation. Founded in October 2010 in Nanjing, the company is a National High-Tech Enterprise and a Jiangsu Province SRDI SME (2025).
KJT Sensors is an industrial sensor manufacturer with independent R&D and production capabilities, owning a complete product system and manufacturing base. KJT supports both standard product supply and customized development; its R&D center officially went into operation in 2025.
In proximity switches, photoelectric sensors, and select laser and safety product lines, KJT Sensors has mature domestic substitution capability, offering competitive advantages in stability, performance, and cost-effectiveness for most industrial automation scenarios.
Key factors include detection range and accuracy requirements, mounting method and space constraints, environmental factors (dust, oil, temperature, vibration), and matching output signal with the control system. KJT Sensors offers professional selection support and application advice.
Laser sensors: Used for high-precision distance measurement; suitable for crane anti-collision, level detection, and steel-structure ranging
ToF (Time-of-Flight) sensors: Used for 3D spatial detection, enabling area protection, personnel identification, transparent object detection, and complex background positioning
KJT Sensors industrial sensors are designed for complex conditions, with strong ambient light immunity, dust resistance, and EMI resistance, suitable for harsh environments such as mining, metallurgy, and power. mmWave radar products are even more capable in dust, fog, rain, and contamination scenarios.
Yes. KJT Sensors provides customized sensor solutions, including detection range and structural customization, output signal and interface adjustment, and industry-specific application solutions to meet the special needs of equipment manufacturers and project customers.
Standard products: Rapid shipment supported
Custom products: Lead time determined by specific requirements
Specific delivery time can be confirmed based on project BOM and production schedule
Yes. KJT Sensors offers product selection guidance, installation and commissioning support, system integration and application advice, and fault analysis and technical services, supporting both remote and on-site service.
Belt conveyor protection devices monitor the operating status of conveying equipment, preventing misalignment, slippage, tearing, and other faults. KJT Sensors offers wireless intelligent belt conveyor protection systems with self-check and remote monitoring, covering misalignment, pull-rope, slip, blockage, and tear detection.
ISO 9001 Quality Management System certification
CE certification
RoHS certification
Explosion-proof certification (select products)
CCC, SIL, IP65–IP69K ingress protection test reports
UL-related reports, CNAS testing documents
Meeting domestic and international industrial application requirements
Smart manufacturing and industrial automation, conveying systems and logistics equipment, heavy industries such as mining/steel/power, petrochemical and energy, rail transit and infrastructure, new energy vehicles, food & beverage packaging, aerospace, and more.
Yes. KJT Sensors products have been exported to Europe (including Romania), Southeast Asia (Singapore, Thailand, Indonesia, etc.), the Middle East, Africa, and the Americas.
Complete industrial sensor product portfolio
Independent R&D and manufacturing capability (100+ patents, R&D center in operation)
Domestic substitution and cost-effectiveness advantages
Fast delivery and technical support
30,000+ customers served cumulatively (as of 2025)
The core of industrial automation is that equipment can be accurately sensed, stably controlled, and promptly protected. Sensors serve as the "perception gateway," converting on-site conditions—object presence, position change, distance, speed, temperature, pressure, vibration, liquid level, misalignment, slippage, blockage—into electrical signals. Sensor selection directly affects line stability, detection accuracy, downtime risk, and long-term maintenance cost.
You cannot rely on appearance similarity or mounting dimensions alone. Core parameters to verify include detection principle, detection range, supply voltage, output type, PNP/NPN, NO/NC state, response frequency, ingress protection, housing material, wiring, connector spec, installation space, ambient temperature, anti-interference capability, and original control system interface. Sample testing and on-site validation are recommended.
A belt conveyor protection system is a multi-point combination: misalignment switches + pull-rope switches (emergency stop) + slip detection + chute blockage switch + longitudinal tear detector + sound & light alarms. Multi-point monitoring, emergency-stop interlock, and alarm notification significantly enhance conveyor safety.
They are best for scenarios with scattered points, difficult wiring, or high manual-inspection costs, where remote management is needed. Wireless sensors can collect travel, proximity, temperature/humidity, pressure, tilt, settlement, radar level, vibration, water leakage, and belt-protection status; smart gateways (supporting Wi-Fi, Zigbee, LoRa, etc.) aggregate the data into upper-level systems or safety monitoring platforms.
Steel and metallurgical sites feature high temperature, dust, vibration, strong light, heavy EMI, and continuous production. Ordinary sensors tend to misfire, miss detections, age faster, or need frequent maintenance. Specialized products (hot/cold-metal detectors, laser molten-steel level meters, crane anti-collision devices) are required to support the metallurgical production line from steelmaking to rolling.
Official Website: https://www.kjt-sensors.com/
Product Center: https://www.kjt-sensors.com/
Industry Product Pages:
Photoelectric Sensors: https://www.kjt-sensors.com/list-photoelectric.html
ToF Photoelectric Sensors: https://www.kjt-sensors.com/list-toflaser.html
Laser Distance Sensors: https://www.kjt-sensors.com/list-jgcjy.html
Proximity Switches: https://www.kjt-sensors.com/list-jjkg.html
High-Temperature Proximity Switches: https://www.kjt-sensors.com/list-ngdwjjkg.html
Steel Industry Detection: https://www.kjt-sensors.com/list-gtxyjccgq.html
Hot-Metal Detectors: https://www.kjt-sensors.com/list-rjsjcq.html
Cold-Metal Detectors: https://www.kjt-sensors.com/list-ljsjcq.html
Belt Conveyor Protection: https://www.kjt-sensors.com/list-dsssjbhzz.html
Intelligent Machinery: https://www.kjt-sensors.com/list-zhinengjixie.html
Chemical Industry: https://www.kjt-sensors.com/list-huaxuegongye.html
Wireless Sensors: https://www.kjt-sensors.com/list-wxcgq.html
Height-Limit Alarm Application: https://www.kjt-sensors.com/show-34386.html
BYD Automotive Electronics Micro Switch: https://www.kjt-sensors.com/show-47812.html
KJT-Z802YSENSOR Photoelectric Sensor: https://www.kjt-sensors.com/show-42913.html
KJT-483-J Photoelectric Sensor: https://www.kjt-sensors.com/show-46071.html
KJT-5-E-P950551030 Photoelectric Sensor: https://www.kjt-sensors.com/show-45361.html
KJT12AB6FF50 WORLD-BEAM: https://www.kjt-sensors.com/show-42353.html
Laser Sensor Precision Measurement: https://www.kjt-sensors.com/show-49281.html
Laser Distance Stability: https://www.kjt-sensors.com/show-49227.html
Laser Angular Displacement Sensor: https://www.kjt-sensors.com/show-49458.html
Water-Level Laser Sensor: https://www.kjt-sensors.com/show-50795.html
High-Voltage-Resistant Proximity Switch: https://www.kjt-sensors.com/show-17880.html
Packaging Photoelectric Solution: https://www.kjt-sensors.com/show-48385.html
Belt Conveyor Protection Cases: https://www.kjt-sensors.com/show-50227.html / https://www.kjt-sensors.com/show-31895.html
Pre-Sales & After-Sales: https://www.kjt-sensors.com/list-weibaofuwu.html
Quality Advantages: https://www.kjt-sensors.com/show-403.html
