I. Product Overview outside the measurement gauge is a new technology developed by our company, the new products, the level measured by the sensor is posted outside, and the measured liquid non-contact measurement is a level measurement history major innovations. Outside the test gauge continuous level measurement in tanks outside of the tank is not opening, installation may not be discontinued, especially for the replacement of old products. Instrument safe, reliable, high precision, long life, easy installation and maintenance, especially for toxic substances ﹑ ﹑ acid alkali, high temperature and various level of various pure liquid sealed container for accurate measurement. Second, the principle outside the measurement gauge with a sonar ranging principle, by measuring the acoustic echo time in the medium and calibration propagation speed, highly accurate level calculated to overcome the impact of the tank wall of ultrasonic signals, The use of advanced digital signal processing technology, can be truly non-contact, high-precision measurement of tank level. Level gauge can output 4 ~ 20mA standard signal or RS-485 or Hart interface measurement result oriented output bit computer (or the second table), to meet the system's automatic control. Third, the product features a non-contact measurement: no need to test the container openings, industrial instrumentation in the best measurement; 2, high precision, responsive, self-calibration function, to overcome the traditional gauge long-term use After reducing the problem of accuracy; 3, for very broad: can be used for highly toxic, highly corrosive, high pressure, a variety of complex conditions, and various liquid media measurement explosive gas environment; 4, installation without shutdown, unclear cans, not flare up; 5, instrument reliable, stable performance; 6, easy installation, simple operation, without the use of side maintenance, long life; 7, both can easily display the level value in the field , but also through the signal line to its remote control room. Fourth, the technical parameters 1. Performance specifications ● Range: 3m, 5m, 10m, 20m, 30m ● Display resolution: 1mm ● short-term repeatability: 1mm ● measurement error: 1 ‰ ~ 1% (the tank wall is too thick, pressure, Temperature changes can affect accuracy) 2. Power ● 24V DC, ± 15%, 10W 3. Classification ● Standard: four-wire system (two power lines, two signal lines) and two-wire (a power line, a signal lines) ● typical type: Four-wire (two power lines, two signal lines) 4. Interface ● Analog Output: 4 ~ 20mA 5. Transmitter ● Construction: Aluminum ● Protection class: IP65 ● proof mark : ExdIICT6 6. Environmental Conditions ● Host Operating temperature: -20 ℃ ~ + 100 ℃ ● ultrasonic probe Ambient temperature: -50 ℃ ~ + 1250 ℃ (temperature probe up to 200 ℃) ● Humidity: 15% ~ 100% RH Note: If the temperature is below -20 ℃, recommend measures to increase the insulation to the host (plus insulation or heating device) 7. pot ● tank, tank, tank stand, horizontal tanks, etc.