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Price
$54.99
Voltage Monitor Module, A30-U1 DC 0-99.9V Delay Relay Controller Board for Overvoltage Undervoltage Control Voltage Detection โ€” image 1
Voltage TestersMiOYOOWโœ“ In stock

Voltage Monitor Module, A30-U1 DC 0-99.9V Delay Relay Controller Board for Overvoltage Undervoltage Control Voltage Detection

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$54.99
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About this item
  • 1>Screen display Current Measured Voltage Value automatically after power ON. Press SET button enter into set mode and the first bit will keep flashing. The first parameter set is the Upper Limit Voltage Value. Press ENTER button to set first bit value. Its set range is 0~9 as your needs. Press SET button again to switch select the next bit and press ENTER button to change value. Press SET button at 3rd time to switch select the last bit and press ENTER button to change value.
  • 2>Then Then First Parameter โ€˜Upper Limit Voltage Valueโ€™ Has Been Set. Press SET Button At 4th Time To Set Next Parameter The Lower Limit Voltage Value In The Same Methods. Note: its value needs less than the Upper Limit Voltage Value. The third parameter is to set the Voltage Verification Value. Its set range is -0.5V~0.5V. The 4th parameter is to set the Display Screen Automatically Turns OFF Remaining Time Value.
  • 3>Its Set Range Is D-0 ~ D-9 Which Means After 1~9minute, The Screen Will Turn OFF. Note: d-0 means the screen will keen ON all the time. The 5th parameter is to set the Relay Triggering Status โ€˜ON Hโ€™ or โ€˜ON Lโ€™. โ€˜ON Hโ€™ : Relay output will turn ON if the Current Measured Voltage Value is more than the Upper Limit Voltage Value. Relay output will turn OFF if the Current Measured Voltage Value is less than the Lower Limit Voltage Value. It can be applied to battery discharging mode.
  • 4>ON Lโ€™ : Relay output will turn ON if the Current Measured Voltage Value is less than the Lower Limit Voltage Value. Relay output will turn OFF if the Current Measured Voltage Value is more than the Upper Limit Voltage Value.It can be applied to battery charging mode. Automatically enter detection status after set parameters and screen stop flashing.
  • After-Sale Service: Thanks for your purchase. If you have any problem , please feel free to contact us any time. We promise you the solutions within 24 hours.
Product details
Brand
MiOYOOW
Manufacturer
MiOYOOW
Colour
black
Model number
A30-U1
Part number
439302
EAN
0760606718319

Customer reviews

What customers say about Bigamart

10 Trustpilot reviews total, with 2 shown at a time.

Trustpilot
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Excellent
4.5 average rating
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S
Sigalit
๐Ÿ‡ฎ๐Ÿ‡ฑ ยท January 2026
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I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.

V
Verified buyer
๐Ÿ‡ฆ๐Ÿ‡บ ยท November 2025
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The package was here in Australia from England in a few days โ€” so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.

Showing 1โ€“2 of 10 reviews

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Voltage Monitor Module, A30-U1 DC 0-99.9V Delay Relay Controller Board for Overvoltage Undervoltage Control Voltage Detection | Bigamart