With the increasingly serious environmental problems, various countries have formulated strict emission regulations for off-highway vehicle manufacturers, with the goal of reducing nitrogen oxides, hydrocarbons and particulate matter (PM) in diesel engine emissions. The main improvement scheme is to introduce selective catalytic reduction (SCR) and diesel particulate filter (DPF) technology into the engine, and successfully build an SCR system. Therefore, in the actual operation process, the exhaust gas filtered by the particulate filter will flow into the SCR chamber and undergo a chemical reduction reaction with a certain amount of diesel exhaust fluid (DEF) automatically injected here, thereby converting nitrogen oxides into harmless nitrogen and water reactants. At present, the most popular diesel exhaust treatment fluid on the market is AdBlue, which is composed of 32.5% high-grade urea and 67.5% distilled water.

      However, despiteSCRsystem has become a model of improvement in the automotive industry, but it can not be separated fromAdBluediesel exhaust fluid, because as longAdBlueWhen the processing liquid is exhausted, the system will not work. So we need to determine the level sensor in the tankAdBlueliquid level and pass the information to the control unit. If it is exhausted, the liquid is automatically injected; if it is full, the injection is stopped. Here,SSTThe liquid level switch provided can be used as the liquid to be tested (this article is based onAdBlueMainly) When the preset zui low liquid level and zui high liquid level are reached, it is effectively detected and acts as a switch to activate the response. It can also be integrated with the vehicle's electronic control unit to work together to issue an alarm or limit The performance of the vehicle and other responses.

       We recommend inSCRSystem UsageSSTofLLC210D3SHDetectionAdBlueDiesel exhaust fluid, this product belongs to the digital series, and, by the British manufacturerSSTThe supplied level switch is particularly suitable for applications with limited installation space, suchAdBlueFuel tanks, often these applications require the use of small sensor size and low power consumption.

After zui, the article is accompanied by a list at the end of the article.LLC210D3SHThe main features:

1. Working voltage:4.5VDCTo15.4VDC

2. Operating temperature range: standard (-40℃125℃）

3. Can be customized in wet or dry environment output high and low level state

4. Pull current and sink current up100mA

5. NumbersTTL/CMOSCompatible push-pull or load switching outputs

6. Available pre-wiring available

7. Products3Line or4Line optional

8. Reverse polarity, overvoltage, short circuit, transient protection

9. Chemical resistant housing materials can be selected:Polyphone(polysulfone, standard) orTrogamid(transparent nylon)

10. This type of sensor has a variety of internal and external packaging, and can also be freely selected

11. Level switch comes with power supply and microcontroller