{"product_id":"2-i-1-lcd-vattentemperaturmatare-amp-voltmeter-digital-12-v-24-v-med-10-mm-sensor","title":"2-in-1 LCD Water Temperature Gauge \u0026 Voltmeter – Digital 12 V\/24 V with 10 mm Sensor","description":"\u003cdiv class=\"product-summary\"\u003e\n  \u003ch2\u003eQuick Overview – 2-in-1 LCD Water Temperature Gauge \u0026amp; Voltmeter\u003c\/h2\u003e\n  \u003cp\u003e\n    \u003cstrong\u003eKeep track of both coolant temperature and battery voltage – in real-time.\u003c\/strong\u003e\n    This 2-in-1 LCD gauge is ideal for cars, trucks, RVs, motorcycles\n    and marine applications using 12 V or 24 V electrical systems. It combines\n    \u003cem\u003ewater temperature measurement\u003c\/em\u003e and \u003cem\u003evoltage measurement\u003c\/em\u003e into a single clear\n    digital instrument, helping you prevent expensive engine damage and\n    voltage problems.\n  \u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e –10 °C to 139 °C (±1% accuracy).\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTemperature alarm:\u003c\/strong\u003e Flashing warning at 95–120 °C.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVoltage display:\u003c\/strong\u003e Continuous battery monitoring in 12 V\/24 V systems.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSensor:\u003c\/strong\u003e 10 mm water temperature sensor with approx. 60 cm cable.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e Sun-protected LCD with automatic brightness adjustment for clear reading even in strong sunlight.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBuilt for vehicles:\u003c\/strong\u003e Low power consumption, vibration and shock-resistant.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\n    Installation is easy: mount the included 10 mm sensor in the cooling system,\n    connect the red cable to ignition-controlled positive and the red\/black cable to ground.\n    When the ignition is switched on, the gauge immediately displays both \u003cstrong\u003ebattery voltage\n    and current water temperature\u003c\/strong\u003e. If there's a risk of overheating, the\n    display flashes to warn you in time.\n  \u003c\/p\u003e\n  \u003cp\u003e\n    \u003cem\u003eA compact, reliable, and cost-effective solution for anyone who wants full control\n    over the cooling and electrical systems in their vehicle or boat.\u003c\/em\u003e\n  \u003c\/p\u003e\n\u003c\/div\u003e\n\n\n\u003cdiv class=\"product-description\"\u003e\n\u003ch2\u003e2-in-1 LCD Water Temperature Gauge \u0026amp; Voltmeter – Digital 12 V\/24 V with 10 mm Sensor\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e2-in-1 LCD Water Temperature Gauge \u0026amp; Voltmeter\u003c\/strong\u003e is the smart choice for anyone wanting to monitor both coolant temperature and vehicle battery voltage in real-time. This compact gauge combines \u003cem\u003ewater temperature measurement and voltage measurement\u003c\/em\u003e into a single clear digital instrument that works on both \u003cstrong\u003e12 V and 24 V\u003c\/strong\u003e electrical systems. Perfect for cars, vans, trucks, boats, or other vehicles where you need full control over the engine's cooling system and battery health.\u003c\/p\u003e\n\u003cp\u003eThanks to the improved \u003cstrong\u003esunshade design\u003c\/strong\u003e and optimized \u003cstrong\u003elight intensity\u003c\/strong\u003e, you can easily read the screen even in strong sunlight. The imported key components provide higher precision, longer lifespan, and stable measurement results – whether you're driving in city traffic, on the highway, or off-road.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 2-in-1 LCD Car Water Temp Gauge \u0026amp; Voltmeter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupply Voltage:\u003c\/strong\u003e 12 V and 24 V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Temperature Measurement Range:\u003c\/strong\u003e –10 °C to 139 °C (–10 °F to 282 °F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Alarm:\u003c\/strong\u003e 95 °C –120 °C (adjustable via internal threshold)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±1%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Environment:\u003c\/strong\u003e 0 °C to 50 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Size:\u003c\/strong\u003e 10 mm thread\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Length:\u003c\/strong\u003e approx. 60 cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnections:\u003c\/strong\u003e Red wire = +12\/24 V, Red\/black wire = Ground (–)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e Digital LCD with sun protection and adjusted light intensity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsumption:\u003c\/strong\u003e Low power consumption for continuous operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage includes:\u003c\/strong\u003e 1 × Water Temperature\/Voltmeter 9–36 V, 1 × 10 mm sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo functions in one unit:\u003c\/strong\u003e Measure both water temperature and battery voltage on a single screen.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh readability in sunlight:\u003c\/strong\u003e Built-in sun protection and optimized brightness ensure the display is clear even in bright daylight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic temperature alarm:\u003c\/strong\u003e Visual flashing alarm at 95–120 °C warns directly of overheating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccurate and stable:\u003c\/strong\u003e ±1% measurement precision with high-quality key components provides reliable results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow power consumption:\u003c\/strong\u003e Suitable for both 12 V and 24 V systems without draining the vehicle's battery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy installation:\u003c\/strong\u003e Compact size, vibration-proof construction, and clear connecting cables.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong lifespan:\u003c\/strong\u003e Imported core components provide durable performance even in harsh environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide range of applications:\u003c\/strong\u003e Suitable for cars, trucks, motorcycles, boats, RVs, and other vehicles where you want to monitor the cooling system and voltage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWith the 2-in-1 LCD Water Temperature Gauge \u0026amp; Voltmeter, you get both peace of mind and performance – you immediately see if the cooling system is approaching critical temperatures and simultaneously get a continuous view of the battery's status. This allows you to prevent expensive engine and electrical system damage before it occurs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-description\"\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003e2-in-1 LCD water temperature gauge \u0026amp; voltmeter\u003c\/strong\u003e is designed for vehicles with both \u003cstrong\u003e12 V and 24 V electrical systems\u003c\/strong\u003e. It can be used on:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePassenger cars, vans, and RVs\u003c\/li\u003e\n\u003cli\u003eTrucks and construction machinery\u003c\/li\u003e\n\u003cli\u003eBoats and marine applications\u003c\/li\u003e\n\u003cli\u003eMotorcycles, ATVs, and other recreational vehicles\u003c\/li\u003e\n\u003cli\u003eStationary engines and generators that use 12 V\/24 V battery systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe product works equally well in petrol and diesel engines and can be mounted both in the dashboard and as an external gauge in the engine compartment or cabin, as long as it is protected from direct water ingress.\u003c\/p\u003e\n\u003ch2\u003eStep-by-step manual and installation guide\u003c\/h2\u003e\n\u003cp\u003eFollow the steps below to install and use the gauge safely. Read the entire guide before you begin.\u003c\/p\u003e\n\u003ch3\u003ePreparations\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eCheck that you have the \u003cstrong\u003ecorrect sensor (10 mm)\u003c\/strong\u003e and that both the gauge and sensor are undamaged.\u003c\/li\u003e\n\u003cli\u003eTurn off the vehicle's ignition and disconnect the battery's negative terminal to avoid short circuits during installation.\u003c\/li\u003e\n\u003cli\u003ePlan the placement of the gauge so that it is clearly visible but protected from direct moisture.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eMounting the water temperature sensor\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eLocate a suitable point in the cooling system where the sensor can measure the coolant temperature, e.g., on an existing sensor port or by mounting a T-adapter on a radiator hose.\u003c\/li\u003e\n\u003cli\u003eMount the sensor with a \u003cstrong\u003e10 mm thread\u003c\/strong\u003e and use thread sealant or a copper washer to prevent leakage.\u003c\/li\u003e\n\u003cli\u003eRoute the sensor cable (approx. 60 cm) to the location where the gauge will be installed and secure the cable so that it does not come into contact with moving or hot parts.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eElectrical connection\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed cable:\u003c\/strong\u003e +12 V or +24 V (connects to the vehicle's ignition-switched positive).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed\/black cable:\u003c\/strong\u003e Ground (–) – connects to the vehicle's chassis or the battery's negative terminal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003col start=\"4\"\u003e\n\u003cli\u003eCheck that all connections are secure and that the cables are protected from chafing and heat.\u003c\/li\u003e\n\u003cli\u003eReconnect the battery's negative terminal and turn on the ignition to check that the gauge starts and displays both voltage and current water temperature.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eConfiguration and use\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eWhen the vehicle is running, the gauge automatically displays \u003cstrong\u003ebattery voltage (Volts)\u003c\/strong\u003e and \u003cstrong\u003ewater temperature (°C\/°F)\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eIf the coolant reaches the pre-set alarm temperature (95 – 120 °C), the display flashes to warn of overheating.\u003c\/li\u003e\n\u003cli\u003eFor best readability, the built-in light intensity automatically adjusts to avoid glare and protect the eyes.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eClean the display and casing with a lightly dampened soft cloth – do not use solvents.\u003c\/li\u003e\n\u003cli\u003eRegularly check that the sensor is tightly fitted and that no coolant leaks have occurred.\u003c\/li\u003e\n\u003cli\u003eIf the gauge is not used for extended periods, disconnect the power supply to avoid unnecessary battery drain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAlways disconnect the battery's negative terminal before making electrical connections.\u003c\/li\u003e\n\u003cli\u003eDo not allow cables to rest against hot engine parts or moving components.\u003c\/li\u003e\n\u003cli\u003eUse only the included sensor – mixing with other brands can lead to inaccurate readings or damage the gauge.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-description\"\u003e\n\u003ch2\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003ch3\u003eWhat does this 2-in-1 gauge measure?\u003c\/h3\u003e\n\u003cp\u003eIt displays the \u003cstrong\u003ecoolant temperature\u003c\/strong\u003e via the included 10 mm sensor and the \u003cstrong\u003ebattery voltage\u003c\/strong\u003e (voltmeter) in real-time.\u003c\/p\u003e\n\u003ch3\u003eDoes it fit both 12 V and 24 V?\u003c\/h3\u003e\n\u003cp\u003eYes. The gauge supports \u003cstrong\u003e12–24 V\u003c\/strong\u003e (specified as 9–36 V in the package description). Connect the red wire to +12\/24 V and the red\/black wire to ground (–).\u003c\/p\u003e\n\u003ch3\u003eWhat temperature range can be displayed?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e–10 °C to 139 °C\u003c\/strong\u003e (equivalent to –10 °F to 282 °F). Accuracy approximately \u003cstrong\u003e±1%\u003c\/strong\u003e within the specified operating environment of 0–50 °C.\u003c\/p\u003e\n\u003ch3\u003eDoes it have an overheating alarm?\u003c\/h3\u003e\n\u003cp\u003eYes. At \u003cstrong\u003e95–120 °C\u003c\/strong\u003e, a \u003cstrong\u003eflashing alarm\u003c\/strong\u003e is activated on the display to warn of the risk of overheating.\u003c\/p\u003e\n\u003ch3\u003eIs the screen readable in strong sunlight?\u003c\/h3\u003e\n\u003cp\u003eYes. The unit features a \u003cstrong\u003esunshade design\u003c\/strong\u003e and optimized \u003cstrong\u003elight intensity\u003c\/strong\u003e for good readability in direct sunlight.\u003c\/p\u003e\n\u003ch3\u003eMust I use only the included sensor?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e The instrument and sensor are matched. Mixing with other brands can lead to incorrect readings or damage to the equipment.\u003c\/p\u003e\n\u003ch3\u003eWhere do I mount the 10 mm sensor?\u003c\/h3\u003e\n\u003cp\u003eIn a suitable port in the cooling system (e.g., thermostat housing, radiator hose with a T-adapter, or an existing sensor port with a 10 mm thread) where the water flow is representative.\u003c\/p\u003e\n\u003ch3\u003eCan I switch between °C and °F?\u003c\/h3\u003e\n\u003cp\u003eThe gauge supports both scales (–10 °C to 139 °C \/ –10 °F to 282 °F). Display mode may vary per version – please refer to the included instruction sheet.\u003c\/p\u003e\n\u003ch3\u003eHow long is the sensor cable?\u003c\/h3\u003e\n\u003cp\u003eApproximately \u003cstrong\u003e60 cm\u003c\/strong\u003e. If necessary, you can extend it with high-quality shielded cable and carefully weather-seal the splices.\u003c\/p\u003e\n\u003ch3\u003eIs the gauge resistant to vibrations?\u003c\/h3\u003e\n\u003cp\u003eYes. Production is adapted for \u003cstrong\u003eanti-vibration\/anti-bump\u003c\/strong\u003e in a vehicle environment, but always mount it stably and protected.\u003c\/p\u003e\n\u003ch3\u003eDoes the display draw a lot of power?\u003c\/h3\u003e\n\u003cp\u003eNo. It is designed for \u003cstrong\u003elow power consumption\u003c\/strong\u003e and continuous operation in 12\/24 V systems.\u003c\/p\u003e\n\u003ch3\u003eCan it be used in a boat\/RV\/motorcycle?\u003c\/h3\u003e\n\u003cp\u003eYes, as long as the electrical system is 12\/24 V and the sensor can be mounted in the cooling circuit with proper grounding and protection against water ingress.\u003c\/p\u003e\n\u003ch3\u003eThe voltage shows incorrectly – what could be the cause?\u003c\/h3\u003e\n\u003cp\u003eIncorrect ground point, voltage drop in the power supply, or a bad connection. Use ignition-switched positive, a short and properly sized cable, and a clean ground point.\u003c\/p\u003e\n\u003ch3\u003eThe temperature jumps – what do I do?\u003c\/h3\u003e\n\u003cp\u003eCheck the grounding, wiring, that the sensor is tightly fitted in the water flow (not an air pocket), and that the cooling system is properly bled.\u003c\/p\u003e\n\u003ch2\u003eTips \u0026amp; advice\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose measurement point carefully:\u003c\/strong\u003e A sensor port with good flow-through provides stable and representative temperature readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition-switched positive:\u003c\/strong\u003e Connect the red wire to a fused, ignition-switched +12\/24 V to avoid battery drain during long-term parking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtect wiring:\u003c\/strong\u003e Route cables away from hot and moving parts, use corrugated tubing and cable ties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal threads correctly:\u003c\/strong\u003e Use thread sealant\/copper washer to prevent micro-leaks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration check:\u003c\/strong\u003e If necessary, compare against OBD data or an external reference instrument within the same temperature range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlarm level:\u003c\/strong\u003e Keep track of your engine's normal operating temperature – react immediately if the alarm is triggered.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService:\u003c\/strong\u003e Periodically check connections and ground points for optimal precision.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTroubleshooting\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay dark:\u003c\/strong\u003e Check the fuse, that the red wire has +12\/24 V, and the red\/black wire has good ground. Measure with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage incorrect:\u003c\/strong\u003e Voltage drop in the power supply – try a shorter\/thicker cable, move the power supply closer to the battery\/fuse box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemp shows 0 or —:\u003c\/strong\u003e Break in the sensor loop or poor connection. Check splices and sensor resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnexpected alarm:\u003c\/strong\u003e Verify that the cooling system is bled and that the sensor is actually in the coolant, not in an air pocket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlickering display in sunlight:\u003c\/strong\u003e Shade the front or angle the instrument. Check supply voltage and ground.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × 2-in-1 LCD Water Temperature Gauge \u0026amp; Voltmeter (\u003cem\u003e9–36 V\u003c\/em\u003e)\u003c\/li\u003e\n\u003cli\u003e1 × Water Temperature Sensor \u003cstrong\u003e10 mm\u003c\/strong\u003e with cable (~60 cm)\u003c\/li\u003e\n\u003cli\u003e1 × Quick guide\/instruction sheet (version may vary)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eImportant Notes \u0026amp; Disclaimer\u003c\/h2\u003e\n\u003cp\u003eThis product is intended for \u003cstrong\u003e12\/24 V vehicle use\u003c\/strong\u003e. Always follow correct installation procedures. Use only the included \u003cstrong\u003ematched 10 mm sensor\u003c\/strong\u003e; mixing with other brands can lead to inaccurate measurements and damage.\u003c\/p\u003e\n\u003cp\u003eMount the unit protected from direct water ingress and extreme temperatures (specified operating environment 0–50 °C). The manufacturer reserves the right to improve appearance and functions without prior notice.\u003c\/p\u003e\n\u003cp\u003eAlarm\/accuracy values apply under normal operating conditions. Installation and usage errors, incorrect cable dimensioning, or inadequate grounding can affect precision and function.\u003c\/p\u003e\n\u003cp\u003eUse is at your own risk. Always check against vehicle manufacturer's specifications for safe temperature and voltage levels.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Felkodsläsare","offers":[{"title":"Default Title","offer_id":54480105931020,"sku":null,"price":16.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/4979\/6876\/files\/H8e716f9bc7ec4d59939fdacdca376fedA.avif?v=1766930367","url":"https:\/\/www.felkodslasare.se\/en-en\/products\/2-i-1-lcd-vattentemperaturmatare-amp-voltmeter-digital-12-v-24-v-med-10-mm-sensor","provider":"Felkodsläsare","version":"1.0","type":"link"}