Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant's customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. As an Amazon Associate we may earn from qualifying purchases. We may receive a commission from purchases made through links on our site, which will help us continue to provide you with value.
Best Choice GAEYAELE 
GEYA Current Monitoring Relay Overcurrent Undercurrent Protection Relay(0.1-1A,AC/DC24V~240V) Adjustable delay 0.5-10s to eliminate short current peaks.Best Value GAEYAELE GEYA Current Monitoring Relay Overcurrent Undercurrent Protection Relay(1.6-16A,AC/DC24V~240V) Adjustable delay 0.5-10s to eliminate short current peaks.Respicefinem 
Respicefinem Current Relay 7×3×5 szc25 no al ch self Supply Normally Open ac Current Sensing ac 0. 5-50a Current Monitor this ac current sensing is and manufactured to solve the ac current monitoring. it uses the principle of mutual inductanGAEYAELE GEYA Current Monitoring Relay Overcurrent Undercurrent Protection Relay(0.8-8A,AC/DC24V~240V) Adjustable delay 0.5-10s to eliminate short current peaks.Mingzhe 
DC Current Detection Module Relay Switch Sensor Digital Display Motor Control for Monitoring 12V Circuits [Accurate Detection] Detects dc 7‑30v current up to 10a with a high accuracy of 0.01a, minimizing errors for precise appDomary 
Domary DC 6-80V Voltage Monitoring Relay, Time Delay Charging Discharge Controller Module with 4 Operating Modes, for Vo [Precise Voltage Detection] Equipped with a voltage detection channel and relay switch output for accurate monitoring anuxcell 
uxcell Miniature Current Switch 0-50A Normally Open AC Current Sensing Switch Sensor Monitoring Relay, M3060 The AC current sensing switch uses the principle of mutual induction to sense AC, isolate AC current, and output normallGrcfumo Grcfumo Current Sensing Switch, Current Monitoring Relays, SZC25 NO AL CH Self Supply Adjustable Normally Open AC Curren AC CURRENT MONITORING: The current sensing switch is designed to monitor AC current accurately, isolating it and providiQANYEGN QANYEGN Current Sensing Switch, AC Current Isolation Monitoring, Adjustable AC Sensing Switch, 0.2 to 30A SZC23 NO AL CH ADVANCED AC CURRENT SENSING TECHNOLOGY: Our SZC23 series AC current sensing switch utilizes innovative mutual inductanceZoeyilan Monitoring Relay, DPA51CM44 3 Phase Monitoring Relay, Current Voltage Monitoring Relay, 208-480VAC Phase Sequence Protec STRONG ANTI-INTERFERENCE PERFORMANCE: Built to operate effectively in environments with high electromagnetic interferencBadafaci Badafaci 3-Phase Monitoring Relay 208-480VAC Current Voltage Monitoring Relay Phase Sequence Protector DPA51CM44 3-Phase monitoring relay features strong anti-interference performanceAKLOSIPY AKLOSIPY DC Current Detection Module Relay Switch Sensor with Digital Display for Motor Control 7-30V 10A Control - This advanced DC current detection module features an intelligent relay switch that automatically connects andHyuduo Hyuduo GRV8-03 Voltage Monitoring Relay, Adjustable Settings, Phase Sequence Protection, LED Indicator for Industrial Eq [Voltage Monitoring Efficiency]Monitors three-phase voltage effectively, ensuring safety for industrial equipment againsSpacnana Spacnana Current Sensing Switch, Self-Powered Current Sensor Relay, 0.2-30A Automatic Monitoring for Equipment Safety (N [Current Monitoring] Continuously monitors AC current from 0.2 to 30A, helping prevent overloads and equipment failure.uxcell uxcell Miniature Current Switch 8-35V 0-300A DC Current Sensing Switch Sensor Monitoring Relay Adjustable Normally Open/ The DC current sensing switch uses the principle of mutual induction to sense AC, isolate DC current, and output a normaViaGasaFamido ViaGasaFamido 3 Phase Sequence Relay, Voltage Imbalance Protection Relay with 5A Rated Current for Motor Monitoring and [Phase Protection]Detects and responds to voltage imbalances, ensuring reliable phase sequence protection for your motorHyuduo Hyuduo Adjustable Current Sensing Switch, Fireproof AC Current Sensor 0.5-200A Monitoring Relay for Home Appliances and [Sensing Functionality]Accurately monitors current from 0.5A to 200A, ensuring effective overload protection.CHICIRIS CHICIRIS SZC06 AC Digital Ammeter, 0.3-50A Current Meter with Upper Lower Limit Alarm and Relay Output, for AC110- Elect [Durable Industrial Design] Constructed with plastic housing, this digital ammeter withstands demanding working conditioTOPINCN TOPINCN Adjustable AC Current Sensing Switch for Reliable Power Monitoring in Industrial Equipment (Normally Closed Type [HIGHLY ACCURATE MONITORING] Control various automation industrial equipment with high accuracy and stable performance.XVFSPWP XVFSPWP GRI8 Current Relay Monitoring Range Overcurrent Switch 0.05A-16A AC24-240V or DC24V(GRI8-01,0.5-5A) Miniature Circuit BreakersQANYEGN 3 Phase Monitoring Relay, DPA51CM44 Relay Current Voltage Sequence Protector, 208 to 480VAC with Indicator for Motor HIGH PERFORMANCE: Our 3 phase monitoring relay, the dpa51cm44, is equipped with strong anti interference capabilities, eRASTKY RASTKY Current Sensing Relay SZC25-NO AL-CH Self Supply Adjustable Normally Open AC Current Sensing Switch AC 0.5-50A Mo High Precision and Stability:---- 100% brand new and . High precision, more stable and long service life, making it an iuxcell uxcell Miniature Current Switch 0.05-5A Normally Open AC Current Sensing Switch Sensor Monitoring Relay, M3005 The AC current sensing switch uses the principle of mutual induction to sense AC, isolate AC current, and output normalluxcell uxcell Miniature Current Switch 0.08-10A Normally Open AC Current Sensing Switch Sensor Monitoring Relay, M3010 The AC current sensing switch uses the principle of mutual induction to sense AC, isolate AC current, and output normallHyuduo Hyuduo AC Current Sensing Switch Self-Powered 0.2-30A Amp Monitoring Relay Normally Open for Automated Equipment Industr [Self-Powered Operation] No external power supply needed for easy installation and energy-saving performance in automateYDuupxe YDuupxe Adjustable Current Sensing Switch Normally Open Current Sensing Relay Self Powered for AC Measurement and Monito [High‑power Performance] Mos tube design offers contactless operation for reliability and longevity.uxcell uxcell Miniature Current Switch 0-30A Normally Open AC Current Sensing Switch Sensor Monitoring Relay, M3050 The AC current sensing switch uses the principle of mutual induction to sense AC, isolate AC current, and output normalluxcell uxcell Miniature Current Switch 0-30A Normally Closed AC Current Sensing Switch Sensor Monitoring Relay, M3056 The AC current sensing switch uses the principle of mutual induction to sense AC, isolate AC current, and output normalluxcell uxcell Miniature Current Switch 0-50A Normally Closed AC Current Sensing Switch Sensor Monitoring Relay, M3066 The AC current sensing switch uses the principle of mutual induction to sense AC, isolate AC current, and output normallCocoarm Cocoarm Voltage Protector Relay, Self-Powered Overvoltage Undervoltage Protection, DC Real-Time Monitoring for Motors, U [Self-Powered Operation]No external power source required, directly draws from monitored circuit, simplifying installatiuxcell uxcell Miniature Current Switch 0-100A Normally Closed AC Current Sensing Switch Sensor Monitoring Relay, M3076 The AC current sensing switch uses the principle of mutual induction to sense AC, isolate AC current, and output normalluxcell uxcell Miniature Current Switch 0-200A Normally Open AC Current Sensing Switch Sensor Monitoring Relay, M3080 The AC current sensing switch uses the principle of mutual induction to sense AC, isolate AC current, and output normalluxcell uxcell Miniature Current Switch 0-200A Normally Closed AC Current Sensing Switch Sensor Monitoring Relay, M3086 The AC current sensing switch uses the principle of mutual induction to sense AC, isolate AC current, and output normalluxcell uxcell 2pcs Miniature Current Switch 0-30A Normally Open AC Current Sensing Switch Sensor Monitoring Relay, M3050 The AC current sensing switch uses the principle of mutual induction to sense AC, isolate AC current, and output normallFeeshoppher Feeshoppher Current Sensing Switch Normally Open Current Sensing Switch Adjustable AC 0.2-30A Industrial AC Current Moni [ADJUSTABLE THRESHOLD SETTINGS] Tailor the monitoring threshold from 2A to 30A with ease, accommodating various electricYDuupxe YDuupxe Current Sensing Relay 0.5 AC Current Switch, AC Sensing Switch to 50A Normally Open Amp Sensor Monitoring Relay MATERIAL: The current switch adopts ABS fireproof Cover, which has high safety factor, long service life and andYDuupxe YDuupxe DC Current Detection Module Relay, PCB, Real Time Monitoring 0-10A Scientific Applications and Industrial Use [Precise Current Measurement]Accurate detection from 0 to 10A with a precision of 0.01A, ensuring reliable monitoring fouxcell uxcell 2pcs Miniature Current Switch 0-50A Normally Closed AC Current Sensing Switch Sensor Monitoring Relay, M3066 The AC current sensing switch uses the principle of mutual induction to sense AC, isolate AC current, and output normalluxcell uxcell 2pcs Miniature Current Switch 0-30A Normally Closed AC Current Sensing Switch Sensor Monitoring Relay, M3056 The AC current sensing switch uses the principle of mutual induction to sense AC, isolate AC current, and output normallBrainboxes BRAINBOXES ED-038 Ethernet to 3 X Relay + 3 3 digital inputsLIZEALUCKY DC Motor Reverse Polarity Time Adjustable Delay Relay Drive Current for Motor Operations [PRECISE MOTOR CONTROL] Control the polarity of your motor with ease for efficient operationuxcell uxcell Miniature Current Switch 8-35V 0-50A DC Current Sensing Switch Sensor Monitoring Relay Adjustable Normally Open/N The DC current sensing switch uses the principle of mutual induction to sense AC, isolate DC current, and output a normaMarhynchus Marhynchus Current Sensor Module Relay DC Current Detection Module 0-10A with Digital Display Real Time Monitoring for I [ Measurement] This dc current sensor module delivers exceptional precision with an accuracy of 0.01a (10ma) ensuring reShelly Shelly 1PM Gen4 WLAN Smart Relay Switch, Current Measurement, Electric Meter, 1 Channel, 16 A, Light Switch, Heating, Sm 1-cane power supply: supports up to 16 A at 240 V AC or 10 A at 30 V DC; fits behind wall switches or in junction boxes;Haofy Haofy JVRD6 Guide Rail Phase Sequence Relay Featuring 3-Phase Monitoring for Loss, 6A Rated Current, for Crane Central A [HIGH COMPATIBILITY] Works with a wide range of rated voltages from 200-500VAC, 50/60Hz for adaptability.Generic Generic High Accuracy Adjustable Current Sensing Switch for Electric Power Control, Self Powered Sensing Switch for Inve [AUTOMATIC CONTROL] Effortlessly control industrial equipment such as flashlights, buzzers, and relays with this switch.Spacnana Spacnana 3 Phase Voltage Monitoring Relay, JVR800-2 Voltage Protection Device for Over Under, LCD Display for Industrial [Comprehensive Protection]Monitors over and under voltage, ensuring optimal performance of industrial equipment with resBomefoi Bomefoi Car Circuit Tester,20A 48V Fuse Checker with Front Light | High-Precision Automotive Current Tester with LCD Scr Efficient Fault Diagnosis: Designed to identify relay and fuse faults swiftly, this automotive circuit tester simplifiesShelly Shelly 120A Current Transformer Clamp for 3EM The shelly em 120 a current transformer terminalSpacnana Spacnana Digital Display Ammeter, Plastic with Hall Sensor, Current Monitoring with Overload Protection and Alarm Output [Real-Time Monitoring] Measure and display single current with real-time monitoring and relay alarm for quick response.Omabeta DC 12V 24V 36V 48V Over Voltage Under Voltage Protection Relay with Standard Modular Structure, Real-time Monitoring 2 S Dual Sets: DC overvoltage undervoltage relay is equipped with 2 sets of normally open and normally closed contacts for vRO/SE RO/SE PRI-51/05 Power Monitoring Relay, Current Range 0.5 A / 24-240 V AC + 24 V DC Current monitoring up to 600 AMarhynchus Marhynchus 3 Phase Voltage Monitoring Relay, Voltage Protection Device, Under Over Protector, Rated 208-480V AC for Indu [Voltage Protection]Monitors over-voltage, under-voltage, phase loss, and sequence, ensuring safe operation of machinery20% Off PIOGHAX 240V Plug Power Meter Electricity Usage Monitor,PIOGHAX Energy Watt Voltage Amps Meter with Backlit Digital LCD, Overloa 【Backlit Digital LCD Display】The plug-in power meter is designed to be extremely user-friendly, with a large, clear backPIOGHAX 240V Plug Power Meter Electricity Usage Monitor,PIOGHAX Energy Watt Voltage Amps Meter with Backlit Digital LCD, Overloa 【Backlit Digital LCD Display】The plug-in power meter is designed to be extremely user-friendly, with a large, clear backOMTIBDUH OMTIBDUH GRI8-06 DC Current Monitoring Relay Overcurrent Undercurrent Sensor 2SPDT 8A Current Testing Relay AC/DC24V-240 Jeffergarden Jeffergarden DC Current Detection Module Relay, PCB Material, Real Time Monitoring, Accurate Measurement 0-10A for Indus Real Time Monitoring: Displays current values instantly, making it easy to check circuit status and identify issues quickvcccss 40A 63A 230V Din Rail Adjustable Over Voltage/Under Voltage Protective KWh Energy Meter Relay Over Current Protection Li Dual overvoltage and undervoltage protection: Real-time monitoring of circuit voltage, capable of cutting off the circuiJiawu Jiawu Adjustable AC Current Sensing Switch Self-Powered LED Indicator for Monitoring 0.2-30A Action Current for Home Aut [SELF-POWERED SWITCH] No need for external power supply, making installation easy and convenient.Jelquix Jelquix Current Sensor Module, DC Sensor, Relay Module with 0-10A Range, Digital Display, Real Time Monitoring, Overload [Economical and Versatile Solution] Offering a cost effective yet highly accurate solution this current sensor module isyancinne 1PC 3UG4622-2AW30 3UG46222AW30 Current Monitoring Relay kvcccss 40A 63A 230V Din Rail Adjustable Over Voltage/Under Voltage Protective KWh Energy Meter Relay Over Current Protection Li Dual overvoltage and undervoltage protection: Real-time monitoring of circuit voltage, capable of cutting off the circuiSENECESLI SENECESLI Voltage Relay Module with Industrial Circuit Guard for Stable Performance in Power Systems [PRECISE VOLTAGE DISPLAY] Accurate monitoring from 0-99.9V with initial accuracy at 0.1V, ideal for DC24V operations.OMTIBDUH OMTIBDUH GRI8-06 DC Current Monitoring Relay Overcurrent Undercurrent Sensor 2SPDT 8A Current Testing Relay AC/DC24V-240 ABB ABB CM-SRS.22S Single Phase Current Monitoring Relay 2c/o, B-C=0.3-15A RMS, 24-240V AC/DC (ABB1SVR730840R0500) Safe and reliable voltage and current monitoringABB ABB CM-SRS.21S Single Phase Current Monitoring Relay 2c/o, B-C=3mA-1A RMS, 24-240V AC/DC (ABB1SVR730840R0400) Safe and reliable voltage and current monitoringHiSport HiSport High Current Relays & Modules 12V 120A SPST-NO V23132-A2001-B200 120A High-Power SPST-NO Relay: Handles extreme continuous loads (120A) and massive surges (300A) for demanding applicatiBUBUCAM Battery Isolating Relay 12V/200A 4 Pin Split Charge Relay Switch for Car Rental Caravan Electric Motorcycle Car Relay He Suitable for car lamps, fog lights, windscreen wipers, starters, fans, speakers, traction control systems and so on.Spacnana Spacnana Motor Protector, Digital Intelligent Relay for Overload and Underload Protection, 3-Phase Motor Monitoring Syst [Enhanced Motor Protection]Prevents overload and underload conditions, ensuring optimal operation of your motor for induLEVANLIGHT LEVANLIGHT DC 6.5-100V 0-100A LCD Display Digital Power Monitoring Meter Voltage Current Power Energy Meter Ammeter Volt *Digital multimeter: This digital DC ammeter can test the current, voltage, energy, and active power of electrical equipFXPCGZISH FXPCGZISH GRI8-05 DC Current Monitoring Relay Straight-Through 2A-20A AC24V-240V Over-Current Under-Current Protection(G Phipps Electronics 5v 2 Channel Relay Module with Optocoupler 5V 2 Channel Relay Module with OptocouplerPomya Pomya Digital Display Motor Controller Current Detection Module High Accuracy Relay Switch for DIY Enthusiasts [PRECISE CURRENT DETECTION] Accurately measures DC 7-30V current between 0-10A for precise control.zozii zozii Current Sensing Switch Induction Relay AC Linkage Device Plc Signal over Limit Closed AC 0.2-30A (NC M3056) The range of the monitored current is up to 30A;the monitoring threshold is adjustable within 0.2-30A.Luocute Luocute 3 Phase Voltage Protector, Adjustable Over Under Voltaging Current Protection 63A with LED Display, DIN Rail Mou Adjustable Reset Timer: This three phase voltage protector comes with a default 30-second reset time, which can be custoGrcfumo 3 Phase Voltage Protector Relay, Voltage Monitoring Relay, Voltage Control Relay GRV8-04 M460 CLEAR STATUS INDICATION: The relay includes LED indicators to clearly display its working status. This visual feedback sIstoFlyt IstoFlyt Current Sensing Switch Induction Relay AC Linkage Device Plc Signal over Limit Closed AC 0.2-30A (NC M3056) Mutual inductance current monitoring, security isolation of input and output, self powerRespicefinem Respicefinem 50A 100A Current AMP Shunt Resistor 75mV FL-2 Digital Ammeter Analog Meter for Monitoring Large Currents (5 Accuracy & Range: Boasting a accuracy level of 0.5 for currents between 2 to 4000A, and level 1 for 5000 to 10,000A, ourFXPCGZISH FXPCGZISH GRI8-05 DC Current Monitoring Relay Straight-Through 2A-20A AC24V-240V Over-Current Under-Current Protection(G KVSYYKII KVSYYKII 3P+N 63A Three-Phase DIN Rail Phase Selector, Adjustable, Overvoltage and Undervoltage Current Protection, Moni Circuit BreakerGeneric 3-Phase DIN Rail Phase Selector Relay 3P N Voltage Current Protection Adjustable Over Under High Accuracy Long Service L 100,000OPERATION RELIABILITY: Rated for 100,000 electrical and mechanical operations, this DIN rail voltage relay is buiKVSYYKII KVSYYKII Adjustable 3P+N 3P+N DIN Rail Ammeter Voltmeter, Overvoltage and Undervoltage Current Limit Protection, Monitor Circuit BreakerZopsc 5A AC Current Sensor Module, Analog Current DC Current Sensor Relay with Over Current Protection, 0‑5A Ammeter Sensor Bo 5A over-current sensor module.Tiiyee DPA51CM44 3 Phase Monitoring Relay, Sequence Protector Relay Voltage Protective Over and Under Protection Anti Interfere Multi Functioanl: This insulation monitoring relay has a widely use on the electric filed, and it can be applied to motoJeffergarden Jeffergarden Delay Relay Controller Module, PCB Material, Wide Voltage Detection Range 0-99.9V, Automatic Control for DC Wide Voltage Range: Monitors voltages from 0-99.9V with 0.1V accuracy, ideal for various low voltage applications.Cryfokt Cryfokt Digital AC Meter Power Energy Voltage Current Tester 10A, Overload Alarm & Power Alarm, for Electrical Monitorin [EFFORTLESS MEASUREMENTS] Easily check voltage, current, power, and other parameters with this device.WIHFHGZ Volt Meter Digital Display, Current Tester Power Detector 9610S - Relay Control, Capacity Measurement, Accurate Voltage [Multifunctional Measurement]: Measures Voltage, Current, Charging Capacity AH and WH, Power, and Time for comprehensiveSenzooe 5pcs INA219 Bi-Directional DC Current Power Supply Sensor Breakout Module 5pcs INA219 Bi-Directional DC Current Power Supply Sensor Breakout ModuleViaGasaFamido ViaGasaFamido 3 Phase 4 Wire Power Meter, Built in Relay for Energy Monitoring and Control, Mobile APP Compatible for Re [Real Time Monitoring]Supports monitoring voltage current and power factor in real time allowing users to track electricACAGALA ACAGALA Tuya WiFi Energy Meter 80A Current Transformer Clamp KWh Power Monitor Electricity Statistics Monitoring Device Rich Function Design: Real-time monitoring of energy consumption kWh voltage, current and power, current measuring rangeIAMMETER IAMMETER WiFi Energy Meter, 3 Phase 4 Wire Electricity Monitor, Supports Split Phase, Flexible Current Transformer Input Flexible 5A CT Input: Connect your own 5A output CTs to measure a wide range of current values, from small to very largeNUMNBE DC20D Engine Generator Control Module - Auto Start Stop Function, Comprehensive Protection & Alarm System, Easy Engine S 【Auto Start Stop】: Automatically starts and stops engines or generators, ensuring efficient and convenient operation witPOWTAXBJGD POWTAXBJGD 6-63A 1P+N Smart Circuit Breaker Kwh Meter Monitoring Timer Relay MCB Smart Voltage Current Protection(Meteri KVSYYKII KVSYYKII 3P+N Three Phase Din Rail Phase Selector 100A 63A, Adjustable, Overvoltage and Undervoltage Current Protection, Circuit BreakerDomzhili Domzhili 5Pcs Ina219 Bidirectional Dc Current Power Sensor Tap Module Diy 3V-5V Iic Power Monitoring Sensor Module 4. All features of INA219 support software version.Spacnana Spacnana Adjustable Battery Charging Control Module, Digital Load Controller for All Battery Types, DC 6-60V with Automa [Automatic Load Control] Optimizes charging by monitoring battery voltage, automatically activating the relay for efficiMUNEFE MUNEFE Current Inductive Sensors, AC Current Converter Transformer, Mutual Current Monito for SZT20-CH-420E RUED DESIN: Our sensors are desined with a throuh-center structure to improve the overall performance and safety of theReland Sun Reland Sun 0-5A AC Current Detection Sensor Module Switch Output (12V) Current detection range: AC 0-5A.MUNEFE AC Current Transmitter, 0-200a Output DC Current Transmitte, SZT20-CH-10V Current Transducer for Control System RELIABLE PERFORMANCE: Built with high-quality ABS materials and advanced technology, this transmitter offers reliable an