AUTOOL AS505Product OverviewThe AUTOOL AS505 is a handheld transmission fluid tester for gasoline and diesel vehicle transmission service checks. It uses optical probe technology and a 2.8-inch backlit LCD to help assess transmission fluid transmittance, oil temperature, possible contamination, deposits, and service condition before maintenance decisions.Optical Probe Transmission Fluid Oil Temp Display 2.8-inch LCD6V4 × 1.5V Batteries80cmTeflon Probe10sResponse3 YearsMain Unit Warranty Click to enlarge Click to enlargeBefore You Order And UseBefore You Order And UseUse AS505 as a transmission fluid transmittance and temperature tester. Clean the probe, check the vehicle condition, and read the result indicators carefully before judging whether transmission fluid service may be needed.Transmission Fluid TestingAS505 is mainly used to test automotive transmission fluid transmittance and oil temperature. Reduced transmittance may be related to impurities, deposits, or metal contamination in the fluid.Suggested Test IntervalIt is recommended to check transmission fluid condition every 5,000-10,000 km, especially before deciding whether transmission fluid service is needed.Clean The Probe FirstWipe the test probe clean before each measurement. Residual oil, dirt, or contamination on the probe may affect the reading.Engine Below 60°CBefore testing, make sure the engine temperature is below 60°C. This helps keep the measurement process within the recommended operating condition.6V Battery PowerThe tester uses 4 × 1.5V AAA batteries for a 6V operating voltage. Install batteries with the correct polarity before powering on.Auto Power-OffThe tester automatically powers off after about 5 minutes of no activity. Long press the power key to turn the tester on or off manually.Measurement ReminderAS505 helps judge transmission fluid condition through transmittance and temperature; it does not replace full transmission diagnosis.If the result indicates warning or replacement, combine the reading with vehicle mileage, service history, driving symptoms, and workshop inspection.Do not use AS505 as a brake fluid, engine oil, boiling point, or power steering fluid tester. Choose the matching AUTOOL AS model for those fluids.Product ComparisonProduct ComparisonAS505 belongs to the AUTOOL automotive oil and fluid analyzer series. Compare the test object, detection technology, screen, temperature range, test cable length, and power supply before choosing the correct model.AS501 / AS502Brake fluid testers for water content. AS501 uses a 1.8-inch display and 3V power; AS502 uses a 2.8-inch display and 6V power.AS503Engine oil quality tester for gasoline and diesel engine oil transmittance, using optical probe technology, 80cm test cable, and 10s response.AS505Transmission fluid tester for automotive transmission fluid transmittance, with optical probe technology, 2.8-inch backlit display, °C/°F switching, 6V power, and 80cm Teflon hose.AS506Brake fluid boiling point tester using flash point heating technology, 12V power, 4cm test cable, and 16s response.AS507Power steering fluid tester for automotive steering fluid transmittance, using optical probe technology, 80cm test cable, and 10s response. Click to enlargeKey FeaturesKey FeaturesAS505 combines an optical probe, 800mm Teflon hose, oil temperature reading, LCD display, result indicators, and handheld design for practical transmission fluid condition checks.High-Precision Optical ProbeThe integrated photoelectric transceiver sensor probe helps provide stable measurement feedback when checking transmission fluid transmittance.800mm Flexible Hose ProbeThe 800mm Teflon hose probe offers flexible access during testing and is resistant to oil, oxidation, and corrosion for longer service life.Oil Temperature DisplayThe built-in temperature sensor displays the current transmission fluid temperature and supports °C / °F unit switching.2.8-inch Backlit LCDThe high-definition backlit LCD makes readings easier to view in daylight, dim workshop areas, or nighttime conditions.Clear Result IndicatorsThe screen shows transmittance, analog bar graph, OK, warning, and suggested replacement indicators to help users interpret the result quickly.Comfortable Handheld DesignThe silicone-lined handheld portion provides a comfortable grip, while the lightweight body supports easy single-handed operation. Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlarge Click to enlargeSpecificationsAS505 Product Specifications And ControlsThe AS505 uses optical probe technology, a 6V battery power supply, an 80cm Teflon test cable, and a 2.8-inch display for automotive transmission fluid transmittance and temperature checks.Core SpecificationsProductAUTOOL AS505 Transmission Fluid TesterTesting ObjectAutomotive transmission fluid / ATFOperating PrincipleTransmission fluid transmittanceDetection TechnologyOptical probe technologyDisplay Screen2.8-inch backlit LCDTemperature Unit°C / °F switchableTemperature Measurement Range0-85°C / 0-185°FOperating Temperature-10°C-60°COperating Voltage6V, 4 × 1.5V batteriesTest Cable Length80cmTest Duration10s responseHose MaterialTeflon / PTFEProduct Dimensions175 × 72 × 29mm / 6.9 × 2.8 × 1.1inButtons And StructureAProbe tipBDisplayCPress to toggle temperature unitsDPress to turn on / off the backlightEPress to testFLong press to turn on / off the testerGBattery cover Click to enlarge Core SpecificationsProductAUTOOL AS505 Transmission Fluid TesterTesting ObjectAutomotive transmission fluid / ATFOperating PrincipleTransmission fluid transmittanceDetection TechnologyOptical probe technologyDisplay Screen2.8-inch backlit LCDTemperature Unit°C / °F switchableTemperature Measurement Range0-85°C / 0-185°FOperating Temperature-10°C-60°COperating Voltage6V, 4 × 1.5V batteriesTest Cable Length80cmTest Duration10s responseHose MaterialTeflon / PTFEProduct Dimensions175 × 72 × 29mm / 6.9 × 2.8 × 1.1in Buttons And StructureAProbe tipBDisplayCPress to toggle temperature unitsDPress to turn on / off the backlightEPress to testFLong press to turn on / off the testerGBattery cover How To UseHow To UseClean the probe, confirm the engine temperature is below 60°C, insert the probe into transmission fluid, press the test key, and read the transmittance and temperature result on the display.Install Batteries And Power OnOpen the rear battery cover, install 4 × 1.5V AAA batteries with correct polarity, then long press the power key for more than 2 seconds.Wipe The Probe CleanBefore each measurement, wipe the probe tip clean so old oil or dirt does not affect the transmittance reading.Check Temperature ConditionMake sure the engine temperature is below 60°C. Press the temperature key if you need to switch between °C and °F.Submerge The ProbePlace the testing probe into the transmission fluid. Keep the probe properly immersed during measurement.Press Test And Read ResultPress the test button. The interface displays the transmission fluid transmittance and current fluid temperature. Click to enlargeUse NotesThe tester displays OK when transmittance is between 100% and 50%.The warning indicator appears when transmittance is between 50% and 30%.The suggested replacement indicator appears when transmittance is below 30%.After measurement, long press the power key for about 2 seconds to shut down the tester.The tester automatically powers off after 5 minutes without operation. Click to enlargeMeasurement And Reading GuideMeasurement And Reading GuideThe AS505 screen displays transmittance, fluid temperature, battery status, backlight status, sound indicator, and result icons. Use the result as a service reference together with vehicle condition and maintenance history.OKTransmittance is good. The measured transmission fluid condition is within the good display range.WarningTransmittance warning. Check the fluid condition and consider vehicle symptoms, mileage, and maintenance history.Suggested To ReplaceLow transmittance may indicate the fluid needs service attention or replacement under proper workshop judgment.Transmittance %Shows the measured transmittance value of the transmission fluid.TemperatureShows the current transmission fluid temperature during testing.Battery / Backlight / SoundShows battery level, backlight indicator, and sound indicator for easier operation. Click to enlargeWhat Is In The BoxWhat Is In The BoxThe package image shows the AS505 main unit, retail box, and user manual. Refer to the final package image and actual shipment for included items.Main UnitAUTOOL AS505 transmission fluid tester with integrated 800mm probeRetail BoxAUTOOL AS505 product package box shown in the package imageUser ManualAUTOOL AS505 user manual for setup, display, battery installation, operation, and warranty informationPackage NoteAccessories shown in the package image. Batteries are not listed in the package image, so prepare 4 × 1.5V AAA batteries if needed.Manual And DownloadsManual And DownloadsDownload the AS505 manual for product structure, display description, battery installation, operating instructions, result interpretation, and warranty information. Click to enlargeAUTOOL AS505 User ManualOpen the PDF manual for AS505 setup, battery installation, interface display, operation, transmittance result reading, and warranty guidance. Download ManualNeed Testing Confirmation?Contact AUTOOL Store before ordering if you need to confirm whether AS505 is suitable for your transmission fluid testing, probe use, temperature reading, result interpretation, or AS series model selection.Email[email protected] WhatsApp 86 189 2647 7404Related ProductsRelated ProductsCompare related AUTOOL oil and fluid testers for brake fluid water content, engine oil quality, transmission fluid transmittance, brake fluid boiling point, and power steering fluid transmittance. SALESelect options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Oil Analysis TesterAUTOOL AS502 Car Brake Fluid Tester For Water Content TestingRated 0 out of 5(0) From US$30.00 Select options This product has multiple variants. The options may be chosen on the product page SALESelect options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Oil Analysis TesterAUTOOL AS503 Engine Oil Tester with Digital DisplayRated 0 out of 5(0) From US$39.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Oil Analysis TesterAUTOOL AS505 Exchanger Transmission Oil Tester with DisplayRated 0 out of 5(0) From US$49.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Oil Analysis TesterAUTOOL AS506 Automobile Brake Fluid TesterRated 0 out of 5(0) From US$72.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Oil Analysis TesterAUTOOL AS507 Power Steering Fluid Tester High Precision probeRated 0 out of 5(0) From US$30.00 Select options This product has multiple variants. The options may be chosen on the product page Questions And AnswersThese answers cover AS505 test purpose, transmission fluid use, result reading, operating steps, temperature limits, power supply, package contents, model selection, and warranty support. What Does The AUTOOL AS505 Test? AS505 tests automotive transmission fluid transmittance and displays transmission fluid temperature. It helps users assess fluid clarity, possible contamination, deposits, and whether service attention may be needed. Is AS505 An ATF Exchanger Or A Fluid Tester? AS505 is a transmission fluid tester. It is used to check transmission fluid transmittance and temperature. It does not exchange, flush, drain, or refill transmission fluid. How Often Should I Test Transmission Fluid With AS505? It is recommended to test transmission fluid once every 5,000-10,000 km. Testing frequency can also depend on vehicle mileage, driving conditions, transmission behavior, and maintenance schedule. How Do I Use The AS505? Install batteries, power on the tester, wipe the probe clean, confirm the engine temperature is below 60°C, submerge the probe into transmission fluid, press the test button, and read the transmittance and temperature result on the LCD. What Do OK, Warning, And Suggested Replacement Mean? OK indicates transmittance is between 100% and 50%. Warning indicates transmittance is between 50% and 30%. Suggested replacement appears when transmittance is below 30%. Use these results as a service reference together with vehicle condition and workshop judgment. Can AS505 Test Engine Oil, Brake Fluid, Or Power Steering Fluid? AS505 is designed for automotive transmission fluid testing. For engine oil transmittance, choose AS503. For brake fluid water content, choose AS501 or AS502. For brake fluid boiling point, choose AS506. For power steering fluid transmittance, choose AS507. What Temperature Conditions Should I Follow? The tester operating temperature is -10°C-60°C. The transmission fluid temperature display supports 0-85°C / 0-185°F. Before measurement, the engine temperature should be below 60°C. What Power Supply Does AS505 Use? AS505 uses 6V power from 4 × 1.5V batteries. Open the rear battery cover, install the batteries with correct polarity, and close the cover securely before use. What Is Included In The AS505 Package? The packing list image shows the AS505 main unit, retail box, and user manual. The built-in probe is attached to the tester. Refer to the package image and actual shipment for final package contents. Why Should The Probe Be Wiped Clean Before Testing? The optical probe reads fluid transmittance. Oil residue, dirt, or contamination left on the probe may affect measurement feedback, so the probe should be wiped clean before each measurement. How Long Is The Warranty? AUTOOL provides 3-year support for the AS505 main unit under eligible non-human damage conditions. Accessories may have separate warranty coverage according to the manual and after-sales policy. Contact AUTOOL Store for warranty, replacement parts, and lifetime maintenance support. Who Should I Contact For AS505 Setup Or Model Selection? Contact AUTOOL Store if you need help with AS505 setup, transmission fluid testing, result interpretation, package confirmation, or choosing between AS502, AS503, AS505, AS506, and AS507.Warranty And ContactWarranty And ContactFor AS505 transmission fluid testing, probe cleaning, battery setup, display reading, package confirmation, AS series model selection, or warranty support, contact AUTOOL Store directly.Pre-Sales And Product SupportUse support if you need help confirming whether AS505 fits your transmission fluid testing needs, how to interpret transmittance results, how to use the 800mm probe, or which AUTOOL oil and fluid analyzer model to choose.AS505 transmission fluid transmittance and temperature testing supportProbe cleaning, battery installation, and operating step confirmationDisplay reading explanation for OK, warning, and suggested replacement indicatorsPacking list and manual download confirmationAS502 / AS503 / AS505 / AS506 / AS507 model selection3-year main unit warranty support for eligible non-human damage casesLifetime maintenance support and response within 24 hours when availableEmail Support[email protected] WhatsApp Support 86 189 2647 7404