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Best Current Monitoring Relays Deals Online in the US (10 deals found)

Last Updated - March 15, 2026 Sort By:

Best Choice

New
Current Sensing Relay AC Current Sensing Switch 0-30A Normally Open Current Sensor Monitoring Relay (M3050)
Multi-Purpose: M-3050 AC current sensing switch is specially designed and manufactured to solve AC current monitoring. It uses the principle of mutual inductance to sense AC direct current, isolate the AC current, output normally open or normally closed switch signals, and directly control various automated industrial equipment, such as flash lamps, buzzers, relays, microcontrollers or other power load equipment.

$16.99
Best Value

New
Current Sensing Relay AC Current Sensing Switch 0-50A Normally Closed Current Sensor Monitoring Relay (NC50)
Universal Outputs: Input through current: 0.2-50A AC Rated load: 0.3A@240V AC/DC.

$16.24
New
AC Current Sensing Switch 0.2~30A Self-Powered Current Sensor Monitoring Relay (Normally Open)
Multifunctional control: Controlling of various automatic industrial control equipment, flash, buzzer, relay, single chip, or other power load equipment.

$16.56
Used
AC Current Sensing Switch 0.2~30A Self-Powered Current Sensor Monitoring Relay (Normally Open)
Multifunctional control: Controlling of various automatic industrial control equipment, flash, buzzer, relay, single chip, or other power load equipment.

$15.09
New
FEARLIE Current Sensing Switch, Normally Closed AC Sensor 0.2-50A Detectable, High Precision Monitoring Relay（F007）
Accurate & Reliable Measurement：FEARLIE F007 AC current sensing switch offers a precise 0.2-30A sensing range with solid-state output, boasting measurement accuracy better than 1%. It reliably works with any waveform, ensuring stable monitoring for your electrical systems. Trust this current sensor to deliver consistent results in industrial applications.

$16.99
New
Current Sensing Relay AC Current Sensing Switch 0-30A Normally Closed Current Sensor Monitoring Relay (N30)
Universal Outputs: Input through current: 0.2-30A AC Rated load: 0.3A@240V AC/DC.

$16.99
New
Current Sensing Relay AC Current Sensing Switch 0-30A Normally Closed Current Sensor Monitoring Relay (M3056)
Multi-Purpose: M3056 AC current sensing switch is specially designed and manufactured to solve AC current monitoring. It uses the principle of mutual inductance to sense AC direct current, isolate the AC current, output normally open or normally closed switch signals, and directly control various automated industrial equipment, such as flash lamps, buzzers, relays, microcontrollers or other power load equipment.

$16.99
New
DC Current Switch,Current Sensing Relay DC Current Sensing Switch 0-50A Amp Sensor Monitoring Relay D360
Basic Function:When the piercing current exceeds the set value, the output switch will act Automatically reset when the piercing current is less than the set value.

$28.99
New
Current Sensing Relay AC Current Sensing Switch 0-50A Normally Open Current Sensor Monitoring Relay (N50)
Universal Outputs: Input through current: 0.2-50A AC Rated load: 0.3A@240V AC/DC.

$16.24
New
DPA51CM44 3 Phase Monitoring Relay Current Voltage Monitoring Relay Phase Sequence Protector 208-480VAC Phase Sequence Protector with Indicator for 3 Phase Motor
Small Size: This 3-Phase Monitoring Relay has a small compact size for easy and convenient use and install, and the size of the Monitoring Relay is 8.1 x 6.7 x 1.75 cm/3.1 x 2.6 x 0.6 inch, you can install it on any places around the room, saving a lot of place

$22.55

10 Current Monitoring Relays deals are available from: Amazon stores, starting from $15.09.
The biggest discount we found is 10%% on Current Sensing Relay AC Current Sensing Switch 0-30A Normally Open Current Sensor Monitoring Relay (M3050) at Amazon.
The lowest price we found is $15.09 while the highest is $28.99.
Prices for the best Current Monitoring Relays deals average at $18.36.
Last updated on March 15, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Current Monitoring Relays.