24 best tester under $20.00
We picked 24 tester from AliExpress with real orders and good reviews. Prices go from $1.58 to $10.32, the average rating is 4.8 stars and the most popular one has 66.6k orders. Every product opens on AliExpress, where you pay with buyer protection.
Updated: 2026-11
- 1
-55%Car Truck Voltage Circuit Tester Auto 6V 24V Tools Car Diagnostic Probe Test Pen Light Bul$4.69 $10.44★ 4.9 · 66.6k soldView on AliExpress → - 2
-57%Non-Contact Voltage Detector Pen 12-1000V AC Tester, Live Wire Breakpoint Finder, Electric$4.27 $9.92★ 4.9 · 53.2k soldView on AliExpress → - 3
-63%ANENG DM850 Multimeter Tester 1999 Counts AC DC 600V DC10A Ohm Diode Triode Buzzer Data$7.08 $19.38★ 4.9 · 43.4k soldView on AliExpress → - 4
-71%6V 12V 24V Car Truck Voltage Circuit Tester Auto Car Diagnostic Probe Test Pen Light Bulb$3.86 $13.09★ 4.8 · 42.1k soldView on AliExpress → - 5
-63%DT830B Mini Handheld Digital Multimeter, Voltmeter Ammeter Tester for Automotive &$4.33 $11.73★ 4.9 · 31.2k soldView on AliExpress → - 6
-50%Universal Battery Tester ANENG BT173 Battery Detector Test C D AA AAA N 9V Cell Button Met$4.89 $9.77★ 4.8 · 26.8k soldView on AliExpress → - 7
-53%RELIFE XA5 Inductance Tester Electromagnetic Non-Contact Fault Detection$2.39 $5.13★ 4.9 · 23.3k soldView on AliExpress → - 8
-59%Universal Brake Fluid Tester Accurate Oil Quality Diagnostic Tools LED Indicator Liquid Te$3.22 $7.85★ 4.9 · 20.9k soldView on AliExpress → - 9
-56%6V 12V 24V Car Truck Voltage Circuit Tester Pen, 5V-90V Digital Display Auto Test Light Pr$4.48 $10.29★ 4.9 · 19.1k soldView on AliExpress → - 10
-60%Auto Car Brake Fluid Liquid Tester Pen With Intelligent Display$3.22 $8.04★ 4.9 · 14.3k soldView on AliExpress → - 11
-64%Key Switch Keychain Shaft Tester Mechanical Keyboard Fidget Button Fidget Button Finger$1.58 $4.33★ 4.8 · 11.4k soldView on AliExpress → - 12-57%Universal Brake Fluid Tester Accurate Oil Quality Diagnostic Tools LED Indicator Liquid Te$4.10
$9.59★ 4.8 · 10.7k soldView on AliExpress → - 13
-68%Universal Brake Fluid Tester Accurate Oil Quality Diagnostic Tools LED Indicator Liquid Te$3.01 $9.29★ 4.8 · 10k soldView on AliExpress → - 14
-66%ANENG ST180 AC Current Clamp Meter Digital 4000 Counts Multimeter Ammeter Voltage Tester$9.56 $27.76★ 4.9 · 10k soldView on AliExpress → - 15
-63%Haozee Tuya Smart Bluetooth Soil Tester Temperature and Humidity Meter Thermo Hygrometer G$9.36 $25.45★ 4.9 · 10k soldView on AliExpress → - 16
-61%Zigbee Soil Sensor Moisture Temperature Humidity Tester Light Fertility Meter Garden Home$5.56 $14.38★ 4.9 · 10k soldView on AliExpress → - 17
-55%20A 1000V Probe Test Leads Pin for Digital Multimeter Needle Tip Multi Meter Tester Lead P$3.68 $8.19★ 4.9 · 10k soldView on AliExpress → - 18
-58%MUFASHA Non-Contact Voltage Detector Electrical Pen AC Voltage Tester Smart Breakpoint Fin$4.94 $11.80★ 4.7 · 10k soldView on AliExpress → - 19
-66%Tuya Zigbee Temperature Humidity Moisture Detector Smart Soil Tester Moisture Sensor Phone$5.78 $17.14★ 4.5 · 10k soldView on AliExpress → - 20
-58%6V 12V 24V Car Truck Voltage Circuit Tester Auto Car Diagnostic Probe Test Pen Light Bulb$5.52 $13.14★ 4.7 · 8.9k soldView on AliExpress → - 21
-55%Car Diagnostic Tool CY3001 OBD2 Scanner Code Reader Car Voltage Tester Engine Fault Code S$10.32 $22.98★ 4.9 · 8.7k soldView on AliExpress → - 22
-59%ANENG VD807 NCV Non‑Contact Voltage Tester Pen 12‑300V Sound Light Alarm Live Neutral Wire$4.27 $10.44★ 4.9 · 8.5k soldView on AliExpress → - 23
-56%ANENG SZ304 Multifunction Digital Multimete True RMS Handheld High Precision Tester NCV$9.83 $22.33★ 4.7 · 7.6k soldView on AliExpress → - 24
-56%Smart Mini Digital Multimeter Tester RMS 4000 Counts Voltmeter Automatic Range Test$8.34 $19.08★ 4.9 · 7.4k soldView on AliExpress →
Prices and ratings come from AliExpress and can change. We may earn a commission when you buy through our links, at no extra cost to you.