• Beijing Zetron Technology Co., Ltd
    Hello, I already used the equipment in an aluminum smelting plant in Mexico and I was surprised by the function of your company's laser device.
  • Beijing Zetron Technology Co., Ltd
    Good gas leak detection instrument !!! High accurate test values :D
Contact Person : Lisa Niu
Phone Number : +86 15699785629
Whatsapp : +8615699785629

Home Indoor Air Quality Monitors CO Gas Alarm Detector EN50291\

Place of Origin China
Brand Name Zetron
Certification CE
Model Number ZKD-621C
Minimum Order Quantity 1 piece
Packaging Details paper carton
Payment Terms L/C, D/A, D/P, T/T, Western Union

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Whatsapp:0086 18588475571

Wechat: 0086 18588475571

Skype: sales10@aixton.com

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Product Details
Product Name Carbon Monoxide Gas Detector Detecting Gas CO/Carbon Monoxide
Sensor Electrochemical Sensor Material ABS Plastic
Color White Certificate CE ISO EN 50291 Approved
Size 106*37.5mm Weight 195g
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195g Indoor Air Quality Monitors


EN50291 Indoor Air Quality Monitors


106*37.5mm Home Air Quality Monitors

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Product Description

ZKD-621C Carbon Monoxide Alarm


ZKD621C is a smart carbon monoxide alarm adopts high quality electrochemical sensor, combined with advanced electronic technology and sophisticated process, with the advantages of stable operation and long service life.
ZKD621C is certified by EN50291, reliable, safe and reliable.

It can be installed in a variety of ways, such as table placement, ceiling or wall hanging.
Where there is carbon monoxide gas, once the concentration of carbon monoxide gas reaches the alarm set value, the co detector will send out sound and light alarm signals to remind you to take effective measures quickly, so as to effectively avoid fire and explosion.





1.This CO alarm has automatic self-test function to detect ant failure of hardware, which is performed about every 1minute in normal standby status.
2.Green: power indicator, flashing once every 35s;
Red:alarm indicator, flashing 100ms on/100ms off;
Yellow:fault indicator, once detect the fault or failure, the buzzer sounds 2 times per 8s.



1. MCU processing and SMT Manufacture Technology
2. High reliable electrochemical sensor.
3.When the concentration of CO reaches the alarm setting value, the detector emits an audible and visual alarm indication.



1. 3*1.5V AA battery.
2. Low current consumption, ultra-long standby time
3.After install the battery, the detector starts to warm up for 40s.


Displays the level of carbon monoxide the unit is sensing. Shows CO level in PPM.



It's suitable for homes, office buildings, factories, schools, hotels, warehouses, entertainment places, trains etc.


Home Indoor Air Quality Monitors CO Gas Alarm Detector EN50291\ 0




Q: What is your terms of payment ?
A:We accept trade assurance, western union ,Visa master card and tt.
Trade assurance can protect you, when you confirm the product then the money into my account.

Q: When do you reply to messages?
A: We will reply you for your inquiry in 24 hours.

Q: What is the warranty for your product ?
A: Warranty: 12 months, Lifetime maintenance

Q: When do you send the products? And how do you send it ?
A: For the small order, we will send out the goods with 5 days,If have stock ,we will send immediately.
We send them by ups, fedex, tnt or dhl. For big order, normal is 20 days will finish.

Q:Do you accept OEM or revised logo, color, model, size?
A:Yes, we accept OEM for the qualify buyer.We can make the products according to customer personal requirement.

Q: How about the quality of the managements ?
A: We have a complete quality control system , all of our products will be fully pre-inspection by QC departments before shipping to you . We have the certification of ISO,CE we could send the certification test of our company to you.

Q: How about your after-sale service?
A: After sending, we will track the products for you , until you get the products.
When you got the goods, test them, and give me a feedback.
If you have any questions about the problem, contact with us, we will offer the solve way for you.