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Quick Details

  • Place of Origin: Hong Kong
  • Brand Name: SURECOM
  • Model Number: SF-401plus
  • Display Type: Digital Only
  • Measuring Range: 100Mhz ~ 3000Mhz
  • Accuracy Class: 2.5ppm
  • Voltage: 5V
  • Operating Temperature: -45 ℃ ~ 65 ℃
  • Dimensions: 70 x 30 x 90mm
  • Brand: SURECOM HK
  • Frequency range: 100Mhz -3Ghz
  • Battery build-in: Li-ion 3.7V 600mah
  • impedance input: 50 Ohm
  • current consumption: 10ma
  • TCXO crystal Oscillator: +- 2.5ppm
  • Net Weight: 150g
  • Product Size: 70 x 30 x 90mm
  • Display resolution: 0000.000 or 0000.000
  • Type: Frequency Counter Meter

Packaging & Delivery

Packaging Details each product packed with box
10pieces or above packed with cartoon
Delivery Time 1~7 days

Portable SURECOM SF401plus Frequency Counter Meter



SF401plus Frequency Counter Meter

New Function: for analog and digital Radio



  • The frequency meter capable of measuring the parameters of the frequency of the continuous carrier signal walkie-talkies , with signal strength indicator.
    it is the tool of choice for maintenance personnel ,test frequency and signal strength of wireless enthusiasts.
  • This portable frequency counter is designed for counting continuous wave signal comes from Two-way Radio. 
  • There are easy ranges for you to choose. The ranges cover most of the frequency of the two way radios you want to measure. 
  • Its four-button control is easy to use and its small size allows you to carry it anywhere you like.
  •  Work by  TCXO(Temperature Compensate X'tal (crystal) Oscillator) ,In the range of -45 ℃ ~ 65 ℃ can reach ± 2 ~ ± 4ppm accuracy
  • This include very interesting frequency areas such as 2m HAM radio, all VHF and UHF
  • DMR Radio signal e frequency counter.
  • Easy Battery level 


Feature & Specification:

  •    Frequency range: 100Mhz-3000Mhz
    ! Note: (27MHz to 100MHz It can not be guaranteed and the corresponding normal emission appliance)
  •   CTCSS/DCS Decoder
  •    LCD Dim level setting
  •    Frequency digital 0.000  or 0.0000  ( +-0.001)
  •    Work by TCXO( Temperature Compensate X'tal (crystal) Oscillator) 2~2.5ppm
  •     Frequency Response time:  0.2-0.5sec.( CTCSS/CDCSS >0.5-1sec) 
  •     TFT Color Display 240 x 320 
  •     Build-in  Li-ion battery
  •     Net Weight: 113g 
  •     4 buttons control
  •     Auto power off  1-9minutes   
  •     Charging battery LED indicator  


Specifications for SF-401 and SF-401 PLUS 

Brand Name: SURECOM HKSF-401SF-401-PLUS
 Signal  attenuation s.w.
-10db NoYES
Battery Built-in level VoltageEasy icon
TFT LCD: 320 x 240 pixelsYESYES
Li-ion Battery build-in : 3.7V 600mahYESYES
current consumption:10maYESYES
TCXO crystal Oscillator+- 2.5ppmYESYES
Changer in:Micro USB +5VYESYES

impedance input: 




Dimensions size :

70 x 25 x 90mmYESYES




Power On/Off                                    
Power On –Press and Hold down the [black key] by 2 second 
Power Off –Press and Hold down the [black key] by 4 second of number count down to 0
Charging the battery 
Plug the Power cord into adaptor , Micro USB connected SF-401, The Led indicating:
 *The RED Led is light - Charging        
 * The Green Led is light - Full 
How to check Frequency measuring.    See PIC.3

The transmitter near the frequency counter antenna , see the signal reception conditions is zone green, you can test. Please see Pic.3
e.g. display 1800.000Mhz  , The transmitter distance is too close to the frequency counter will affect the test results, , the signal bar is red .(see Pic.1)
e.g. display 0.000, , The transmitter distance is too far to the frequency counter and signal is weak ,will affect the test results,  the signal bar is low .(see Pic.1)
Note: (27MHz to 100MHz It can not be guaranteed and the corresponding normal emission appliance) .




How to check Frequency of Digital DMR Radio 
Press[ F3 Digital] from Measuring screen mode   See PIC.1
Note: Use Digital mode have 3 Decimal only

MENU funtion setting and save.    See PIC.4
Press [F1] > into menu Page
Press [F3 down] or [F4 Up] into System and Press [F2 Rtn] into system Page PIC.4
Press[F3 down] or [F4 Up] select funtion ,Press [F2 Edit] > [F3 - ][F4 +] change mode
Press[Menu]  >  [F1 ]to Exit  or  [F4 ] to Save and Exit




CTCSS/DCS Decoder for ANALOG mode

CTCSS (Hz)  




CDCSS  for ANALOG mode

2323143143 266465465
2525 145271271466466
2626152152 274503503
4343165165 325546546
5151174174 332606606
5454 212346346624624
7171 225 356631631
115115 246412412703703
 122 252423423723723
125125 255431431731731
















Packaging & Shipping



Company Information



409 SHOP LTD is a manufacturing department of a professional enterprise providing two-way radio accessories. For years, we have been committed to developing products according to domestic and overseas markets' demands. Our full range of products include earphones, headsets, speakers, microphones, throat microphones, air acoustic w/mic, leather cases, batteries, chargers, programming cables, antennas and other fittings compatible with major brands of two-way radios.

We also provide customized solutions for customers depending on their requirements. Our products have been exported to Europe, America and Southeast Asia, enjoying high popularity.

We always persist in new and unique development and strictly follow the quality standard. Our materials are selected through selection process. As a leading department with innovative technology, we are proud of offering good quality products, low prices and better selections, as well as prompt and reliable services to our customers.



Contact US



Q: What's your company MOQ?

A: In generally, if use customer brand, we will ask at least 500pcs, this we can negotiate. 

Q: What's your delivery time?

A: This please ask our stock in first, products can send out once receive your deposit.

If use customer brands, we will take a 20-25days to prepare materials and mass production.

Q: Can your company accept customize?
A: Welcome OEM & ODM.
Q: How do you solve after sale service?

A: This please ask us for technical support if you have workers know how to repair.

If do not have engineers, please send back the items, we can repair the items for you. 

Q: Can you send a sample for us to develop?
A: Yes, we can. Sample can send out once you ask for it, but will ask a sample fee. Sample fee will return back in future order.
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