Static/changing Fields. Common uses include detecting magnetic fields in motors and testing electromagnetic interference levels. Type Magnetic field tester.
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NOYAFA Network Cable Tester NF-488 Poe Ethernet Cable Tester Continuity Tester DC Power Switch Loop-Back Test for CAT5e/CAT6/6a
Aliexpress UK
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0-3800V IGBT Tester Transistor Voltage Tester Diode MOS Triode MOV LED Voltage Capability Transistor Withstand Voltage Tester
Aliexpress UK
(1 x GM3110 high resistance tester).
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ANENG M469D RJ45 Cable lan tester Network Cable Tester RJ45 RJ11 RJ12 CAT5 UTP LAN Cable Tester Networking Tool network Repair
Aliexpress UK
1 x Wrist tester（No wrist strap, no batteries）. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
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Professional Integrated Circuit IC Tester Transistor Tester Online Maintenance Digital LED Transistor IC Chips Tester(A)
Aliexpress UK
ESD Bondline Anti Static Wrist Strap & Footwear Tester Test Station + Leads
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Non-Contact Voltage Tester Pen Voltage Detector Circuit Tester Voltage 220V Live/Zero Wire Tester with Alarm and Flashlight
Aliexpress UK
Three modes to display resistance value on object surface or material property simultaneously. Data hold function. 1 Ground Lead. 1 User Manual (English). 1 9V 6F22 Battery (included). LCD back light for easier and clear reading.
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DMX Remote End Cable Tester DMX Remote End Cable Tester DMX Remote End Cable Tester
Aliexpress UK
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ANCEL BM200 PRO Battery Tester 12V LED Monitor Display Professional Battery Health SOH SOC Tester Analyzer Charging Tester Tool
Aliexpress UK
1 x Wrist tester（No wrist strap, no batteries）. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
eBay
New Soil pH Meter 3/4 in 1 PH Light Moisture Acidity Tester Soil Tester Moisture Meter Plant Soil Tester Kit for Flowers
Aliexpress UK