Best Voltage Monitoring Relays Deals Online in the UK (25 Deals Found)

Last Updated - 23/08/2025 Sort By:

Best Choice
Keenso

New
GRV8-02 Monitor Relay,Single Phase Voltage Monitoring Relay Over Voltage AC/DC Voltage Monitoring for Phase Sequence Pro
Monitor voltage --- Monitor the working voltage (true RMS measurement).This Monitor Relay suitable for long-distance swi

£24.08
Walfront

New
AC230V 63A Voltage Current Protector Over/Under Voltage Device Double LED Display Single Phase Low Voltage DIN Rail Inst
➤ Over/under voltage device: The protector has over voltage protection, under voltage and other functions

£15.96
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New
2x DC12V Voltage Detection Modules Relay Switch Charging Discharge Monitoring
2X Relay modules. In standby mode, press the "minus" button for 3 seconds to turn off the display, and press it again fo

£12.99
Best Value
DONGKER

New
Voltage Monitor Module, A30-U1 DC 0-99.9V Programmable Delay Relay Controller Board for Voltage Detection Overvoltage Un
It Can Flexibly Set Detection Upper and Lower Limit Voltage Values and Set Triggering Conditions.

£16.99
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New
Single-phase Voltage Monitoring Relay 220W Undervoltage/overvoltage Range
If you do not receive our reply within 48 hours, pls. If you are satisfied with our service, pls. 3 indicators indicate

£13.66
YWBL-WH

New
Voltage Monitoring Relay DC 12V/24V/36V/48V Over-Voltage and Under-Voltage Relay 35MM Guide Rail 13-17V 10-14V(DC12V)
TYPICAL APPLICATIONS-The voltage monitoring relay is typically applied in dc motor, battery,UPS power supply, dc switchg

£12.96
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GLFLOW

New
GLFLOW Voltage Monitoring Module, Voltage Monitoring Relay A30-U3, DC 6-80V, Time Delay, Load Discharge Controller, Batt
[ APPLICATIONS] Perfect for voltage monitoring and overvoltage/undervoltage protection across a variety of systems, enha

£14.09
New
LCD 3 Phase 4 Wire Voltage Monitoring Relay Undervoltage Overvoltage Protect UEE
Monitoring Circuit: L1, L2, L3, N. Display Mode: Chinese LCD display each action status. If you are satisfied with our s

£28.95
YALIDA

New
YALIDA DC 6~80V Voltage Monitoring Relay Time Delay Relay Charging Discharge Controller Module Undervoltage Overvoltage
Operating power is DC 6 to 80V, contact load is 30A, 250V AC or 30V DC. High quality voltage monitoring relay is durable

£15.10 £15.59
New
IMO MR-PFRAT Voltage Monitoring 3-Phase 400VAC, Multifunction, 2 CO RELAY

£49.99
YWBL-WH

New
3-Phase Monitoring Relay 380V AC 50Hz 3 Phase Sequence Relay Protector Voltage Protective Relay with Digital Display Ove
MAIN FUNCTION---The 3-phase monitoring relay could achieve real-time monitoring of motor over-current, under-current, ph

£20.16
Oumefar

New
DC 12V/24V/36V/48V Over Voltage and Under Voltage Relay DC Monitoring Relay for DC Motor Industrial Control(DC24V)
STANDARD :Standard modular structure ,guide rail type installation .Real time monitoring of dc overvoltage and undervolt

£16.89
New
Voltage Detection Module Relay Switch Charging Discharge Monitoring Protection D
In other states, the relay is turned ON. In other states, the relay is turned OFF. 7> In the standby state,long press th

£6.36
20% Off
GAEYAELE

New
GAEYAELE Single Phase Voltage Relay Adjustable Over or Under Voltage Protection Monitor Relay with LED display(GRV8-01,A
Controls its own supply voltage (True RMS measurement).

£13.59 £16.99
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New
Voltage Detection Module Relay Switch Circuit Monitoring Protection 12V 24V 7-9V
Powerful, with a detection range of DC 0-99.9V and a minimum of 0.1V adjustable;. Pulsating DC is also prone to fluctuat

£3.80
ELKO EP Germany

New
ELKO EP Germany HRN-33 Voltage Monitoring Relay / 48-276V AC
Voltage monitoring for sensitive consumers

£39.00
New
SINGLE PHASE VOLTAGE MONITORING RELAY 240V
About SCL Components. 3% Fixed Hysteresis. 1 x SPDT Output, 10A AC1.

£32.54
New
Voltage Detection Module Relay Switch Charging Discharge Monitoring Protection
In other states, the relay is turned ON. In other states, the relay is turned OFF. 7> In the standby state,long press th

£7.18
New
DC 9V 12V 24V Voltage Detection Module Relay Circuit Monitoring Module 0-99.9V
Powerful detection range of DC 0-99.9V, starting from 0.1V. 7 Press and hold - to turn off or on the digital tube to dis

£4.20 £4.42
New
GEYA DC/AC12-240V Single Phase Over Under Voltage Monitoring Sensitive Relay
We have more than ten years of production experience and have CE, CB and other international certifications. Customizati

£20.41 £21.49
New
2PC DC12V Voltage Detection Modules Relay Switch Charging Discharge Monitoring
2X Relay modules. In standby mode, press the "minus" button for 3 seconds to turn off the display, and press it again fo

£12.95
New
Crompton voltage monitoring relay 252-PVPW (0)
Made in UK.

£37.12
New
Voltage monitoring relay 250VAC/10A SPDT

£23.66
New
DC High Voltage Alarm Relay for battery and power supply monitoring
The alarm includes a double pole double throw volt free relay rated at 3A @ 230VAC or 30VDC. Connections and installatio

£61.82
New
GEYA GRV8-10 3 Phase Voltage Monitoring Relay 8A/AC1 2SPDT With Phase Protection
We have more than ten years of production experience and have CE, CB and other international certifications. Customizati

£28.00 £29.47

25 Voltage Monitoring Relays deals are available from: Amazon, eBay stores, starting from £3.80.
The biggest discount we found is 20% on GAEYAELE Single Phase Voltage Relay Adjustable Over or Under Voltage Protection Monitor Relay with LED display(GRV8-01,AC220V) at Amazon.
The lowest price we found is £3.80 while the highest is £61.82.
Prices for the best Voltage Monitoring Relays deals average at £21.30.
Last updated on August 23, 2025.
We scanned these quality online stores and more to deliver you with the best offers online available for Voltage Monitoring Relays.