Product Details
KQT-O2 Electrochemical Oxygen Sensor
1.Overview
The KQT-O2 oxygen gas detection sensor is a battery-type sensor. It
generates an electric current through the reduction reaction of
oxygen on the working electrode and the corresponding oxidation
reaction of the anode material. The magnitude of the current is
proportional to the concentration of oxygen. The concentration of
oxygen can be determined by measuring the magnitude of the current.
2. Application Fields
1.Oxygen alarms in the mining field
2.Medical oxygen generators
3.Air quality detection instruments
4.Air purification equipment in underground parking lots and
commercial areas
5.Air quality detection in vehicles, as well as the fresh air
systems of in-vehicle purification equipment
3. Product Features
1. High precision and long service life
2. Fast response speed and quick return to zero
3. Low power consumption and high sensitivity
4. Wide linear range
5. Strong anti-interference ability
6. Excellent repeatability and stability
4. Technical Parameters
Project | Parameter |
Model | KQT-O₂ |
Detection Principle | Electrochemical two-electrode |
Detected Gas | O₂ |
Detection Range | 0 - 25%VOL |
Maximum Load Concentration | 30%VOL |
Output Signal | 100±20 μA in air |
Zero-point Drift | 0.6%VOL |
Resolution | 0.1%VOL |
Response Time | T90 < 20s |
Bias Voltage | 0 |
Load Resistance | 100Ω |
Temperature Range | -30℃ - 50℃ |
Humidity Range | 15% RH to 90% RH (no condensation) |
Repeatability | < ±2% output signal |
Long-term Stability | < 2% signal / month |
Linearity | Linear, regression coefficient R² = 0.999 |
Working Pressure | 90 to 110 kPa |
Shelf Life | 12 months after delivery |
Service Life | 2 years |
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.