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Item specifics
  • Brand Name: KELUSHI
  • Model Number: APM820
  • Measuring Range: +8 ~ -70dBm
  • Accuracy: ± 0.2dB
  • Calibrated Wavelengths: 850nm / 1300nm / 1310nm / 1490nm / 1550nm / 1625nm
  • Resolution: 0.01dB
  • Connecting Adapter: FC/SC/ST/LC& 2.5mm Universal
  • Reference Value storage: Yes
  • Automatic Power Off: No operation in 10 minutes (can be cancelled), Low battery energy
  • Battery Life: Above 100 hours
  • Storage Temperature: -20 Centigrade -- +60, 90%RH
  • Operating Temperature: -10 Centigrade -- +50, 90%RH
Product Description

Fiber Optical Power Meter APM820 -70~+8dB 6 Wavelength 2.5mm Universal FC/SC/ST/LC Network Cable Tester Tool Used in FTTX/ FTTH 

Telecom Maintenance
CCTV Maintenance
Comprehensive cable construction system
Optical instruments research and development
Optical communication education and lab testing
Other optical project
User self calibration function
 Comfortable LCD display and optional backlight LCD display supports night operation
Power measurements in dBm or mw and insertion loss in dB
Low battery consumption, more than 150 hours continual operation time for two 1.5V alkaline batteries

Optional 10 minutes Auto-off function

Main Characteristic






Measuring Range 

-70 ~ +8dBm 


± 0.2 dB 

Calibrated Wavelengths 

850nm / 1300nm / 1310nm / 1490nm / 1550nm / 1625nm 

Display Resolving Power 


Connecting Adaptor 

2.5mm universal and FC/PC; 

Reference Value storage 


 Display unit 

dB  dBm  mW  uW nW 

Display value 

Power, Wave length, Battery 

Automatic Power Off 

No operation in 10 minutes (can be cancelled), 

Low battery energy 

Tone Detector ** (optional) 

+5 ~ - 40 dBm 

Battery Charge 


Battery Life 

150 hours 

Storage Temperature 

-20 -- +60 °c, 90%RH 

Operating Temperature 

-10 -- +50 °c, 90%RH 

Power Supply 

AA * 2 batteries 


140mm * 62mm * 31mm 


About 185g 


About payment
1. We accept Escrow. You can Pay via Alipay, Visa, MasterCard, Western Union, Bank transfer on AliExpress.
2. Please make the payment as soon as possible so that you can get the item earlier.
3. Note: Any import tariff of the item is the buyer\'s responsibility, not included in the selling price or shipping fees; But we will declare the product as a gift with a lower value to help you easily get the item through the Customs.
About shipment
1. WORLDWIDE SHIPPING (except a few countries and APO/FPO).
2. All the orders will be promptly processed and will be shipped out in 2-3 days after the payment is confirmed Holiday time extended.
3,Please kindly do not 1-3 low scores on shipping cause the overseas shipping will be affected by many factors such as Customs processing, Post strike etc.
4. We o nly ship the item to the confirmed order addresses, so please make sure that your order address matches your delivery address.
5. Optional shipping ways: China Post Air Mail, HongKong Post Air Mail, ePacket, EMS, DHL, Fedex, UPS, etc.
6. Almost all the orders under 2kg is for free shipping by China Post Air Mail. Please choose other shipping ways if you need the item urgently!
7. You can track the parcel with the tracking number on the website:
About return &refund
1. You can contact us and then send the item back to us within 7 days after the item is delivered. If the item is in your possession more than 7 days we will considerate used and won\'t offer you a refund or Replacement.
2. All the returned items must be in the original packaging. Beside, you must provide us a shipping tracking number and the specific return reason.
3. We will offer you a refund or resend you a replacement according to the specific condition and your will after you return the item.
4. We will bear all the shipping fees if the product is broken or not as described on the product page link.

About guarantee
1. 12 months Manufacturer’s limited Warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty.
2. Defective items MUST BE reported and returned within the warranty period (and in the original packaging, if possible). You must tell us what the defect is and give us your order number. WE DO NOT REPAIR OR REPLACE ITEMS WITH AN EXPIRED WARRANTY.
You agree to all of the above-listed policies upon ordering on aliexpress!
3.Warranty freight borne by the buyer.

About feedback
1. Our goal is to ensure that all the buyers are satisfied with our product and service.
2. We sincerely hope you can leave us a perfect 5 star positive feedback if you like the item.
3. Please contact us before you will open a dispute or leave us a negative feedback, and then we will give you the best solution.


Packaging Details
  • Unit Type: piece
  • Package Weight: 0.331kg (0.73lb.)
  • Package Size: 25cm x 18cm x 12cm (9.84in x 7.09in x 4.72in)
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Packaging Details
  • Unit Type: piece
  • Package Weight: 0.331kg (0.73lb.)
  • Package Size: 25cm x 18cm x 12cm (9.84in x 7.09in x 4.72in)
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