Circuit Testers

The model 307A insulation tester is intended primarily for periodic testing of industrial motors, transformers, electrical wiring, and cable insulation for signs of deterioration. Low readings may indicate impending failure allowing for permit replacement of suspect component during routine maintenance rather than risking component failure. It ...more

The model 308A insulation tester is intended primarily for periodic testing of industrial motors, transformers, electrical wiring, and cable insulation for signs of deterioration. Low readings may indicate impending failure allowing for permit replacement of suspect component during routine maintenance rather than risking component failure. It ...more

GAO-8AS Lookafor is developed for the fault testing of local telephone circuit using internationally advanced measuring technique in connection with the current situationof domestic telephone network. The instrument is of portable structure, and specially designed for the use of telecom and exchanger room operating staffs, line attendants, mob ...more

Test set for installing ADSL2+ circuits and IPTV.. Handheld durable design to meet the demands of field service. ADSL1/2/2+ Physical Parameters test. DMM (ACV, DCV, Loop and Insulation Resistance, Capacitance, Line length) needed to determine if the copper circuits can support the demands of high performance ADSL2+ and IPTV service. MODEM emul ...more

The Series 90HV combines low-voltage solid-state technology with high-voltage relay technology ¾ solid-state devices for testing continuities and components at low voltage; relays for testing high-resistance isolation and high-current continuity. The high-resistance isolation tests are typically used to test the quality of harness insulation m ...more

Allows instant testing of GFCI receptacles or GFCI circuit breaker protected circuits. Checks 120VAC grounded outlets for correct/incorrect wiring. LED indicators signal correct wiring, open ground, open neutral, open hot, hot/ground reversed, and hot/neutral reversed.  ...more

Tests and verifies proper operation of the Arc Fault Circuit Breaker. Extremely easy to use - One button operation  ...more

The network cable tester is a small hand-held cable tester, which enables network professionals to quickly and easily verify the integrity of Ethernet twisted pair cables. Test for open circuits, shorts, miswires, reversals, and split pairs  ...more

Automatically indicates voltage of circuit under test. Four neon bulb indicator lamps.  ...more

Bulb Lights when circuit is completed. For use with unenergized circuits ...more

Quick check both AC and DC current up to 28 volts with power on. Helps locate shorts or breaks in wiring. Complete with insulated grounding clip. ...more

Hooded Probe Protects Your Fingers and Automatically Centers the Wire. Small size allows easy use even in the tightest places. Quickly test low voltage up to 28 volts. Alligator clip grounds tester. ...more

Also Indicates Polarity. Safe for automotive computers. Won’t damage sensitive electronic components. Draws less than 21 mA. at 12 volts DC. Operating range 3-28 volts. The red light indicates positive polarity, green indicates negative polarity. ...more

Wirehawk® requires just one hand to test circuits in hard-to-reach areas. Works two ways: Captures and pierces wire with unique hook tip design or can be used as an “ice-pick” type tester. ...more

Checks Both Low Voltage and Spark Plug Wires. The low-side checks AC and DC current up to 28 volts with power on. The high-side checks spark plug wires without piercing. Complete with insulated clip. ...more

Heavy Duty Tester Signals With A Light And Buzzer. The tester kit tests low voltage up to 28 volts. Also finds electrical shorts, checks polarity, detects battery drain, and checks circuits from a distance. Heavy-duty coil cord extends over 8 feet. Detachable, spring-loaded hook pulls the center of the wire into the probe every time. Attach alligat ...more

Check continuity on wires, fuses, switches and other electrical systems. Just clip lead to one end of wire in question. Probe other end of wire. If bulb lights up, there is continuity. If bulb fails to light the circuit is open. Not to be used on live circuits or computer sensor feed circuits. ...more

Quickly Tests Low Voltage up to 28 Volts. A heavy duty circuit tester for lifetime use. The probe, handle, cord and clamp are reinforced for extra durability. Comes with a strain relief spring on the cord. ...more

Supplies power or ground to test operation of electrical motors, solenoids and more by supplying power or ground. For 12V or 24V systems. Safe (in test mode) for computer circuits. ...more

Locates circuit breakers and tests receptacle wiring. Quickly locate 110V to 125VAC Circuit Breakers and Fuses. Variable Sensitivity adjustment to pinpoint correct circuit breaker. ...more

Designed specifically for testing computer-controlled vehicles. Tests virtually any circuit on the vehicle. The all-in-one quick check tool for no-starts. Use to verify primary and secondary ignition, pick-up sensors, fuel injectors, fuel pumps, and idle speed control circuits. ...more

The 550 is used to check high voltage circuits on Hybrid cards for leaks to ground. The 550 can supply 250V, 500V and 1000V test voltages for doing complete insulation testing. You can not easily test for high voltage leakage without a high volt test source. The 550 is auto-ranging and can measure up to 2000 MegaOhm with a resolution of 1 K Ohm. ...more

Quickly check for circuit voltage, or continuity! Indicates four voltage ranges from 6V to 24V. Quick check to test injector firing, primary ignition circuits, bad grounds, broken wires, fusible links and more! ...more

Tripp Lite's Multi-Functional Network Cable Tester allows you to test wiring continuity for Cat5, Cat6, Phone and Coax cable assemblies. Identifies mis-wires, short circuits and open circuits. Features two piece transmitter and receiver, two BNC-F coax converters and coax terminator. ...more

1000V analog tester with self storage case. Three test voltages of 250V, 500V and 1000V. Insulation Resistance to 400MΩ. Fuse protected and automatic discharge circuit. Test Lock for extended time tests. 2mA short circuit current  ...more