Product Details
Nitrogen Oxide Sensor Chip KGD-321 for Commercial Vehicle Nitrogen
Oxide Sensors
Product Introduction
The high-quality planar chip KGD-321 is manufactured using HTCC
(High-Temperature Co-fired Ceramics) technology. The multi-layer
sensing element integrated with a heater inside the chip can
maintain measurement accuracy after long-term use. The nitrogen
oxide sensor chip utilizes electrochemical principles to accurately
measure the NOx content in vehicle exhaust by detecting the
magnitude of electric current. It is mainly applied to nitrogen
oxide sensors for commercial vehicles.
Product Features
- Faster start-up time
- Excellent anti-aging performance
- Low heating power
- Resistance to coating and toxicity
- Low driving costs
- Compact structure (high vibration resistance)
- Reduced dependence on exhaust temperature
- Longer service life
- Double-protective tube head to prevent various impacts
Technical Parameters
Items | Details |
Power supply voltage | 10.8V - 32V |
Measurement range | 0 - 21% NOx measurement range: 0 - 2500ppm for NO & NO2, 1 < λ
< ∞ (without NH3) |
Measurement accuracy | 1 - 100ppm: ±10ppm; 100ppm - 500ppm: ±10%; 500ppm - 1500ppm: ±15%;
1500ppm - 2500ppm: ±30% |
Response time | NOx: T10 - 99: 399 - 3990ms; O2: T10 - 90: 3550ms |
Start - up time | TNOX: 165s |
Bending strength | ≥380MPa |
Heater resistance | 2.8 (± 0.5)Ω |
External dimensions | L(67 ± 1) * W(4.25 ± 0.15) * H(1.35 ± 0.15) mm |
Company Profile
Xi'an Kacise Optronics Co.,Ltd. is a professional manufacturer of
measuring instruments , located in China xi’an City. Since 2008,
Xi'an Kacise focused on the development and production of pressure,
level and flow measuring instruments .

We have been specializing in manufacturing pressure, level and flow measuring instruments and related products for 10 years. Based on experienced technical
and management personnel, through efforts of our entire staff, we
have become a professional measuring instrument manufacturer and
solution provider. And we are continuously trying to improve
product quality.

Xi'an Kacise is qualified with ISO 9001-2008, GJB 9001B-2009, CE,
intrinsic safety explosion-proof and isolated safety
explosion-proof certificates, etc. which ensure that our products
comply with international standards.

Kacise sensors have already been exported to America, Spain,
Australia, Chile and 20 other countries and regions, and received
many favorable feedbacks. Our overseas distributers are also
increasing. We regard “reasonable prices, efficient production time
and good after-sales service” as our tenet, and hope to cooperate
with more customers for mutual development.

Our goal is simple: to sell the best products at the best prices,
and provides industry-leading customer service. We personally get
to know each of our customers, and we know how to discover the most
valuable part of our business , to help others achieve their goals.