Introduction: The split type ultrasonic level gauge measures the time required for an ultrasonic pulse to be emitted and returned, and is used for measuring the liquid level and volume of tanks, pools, and reservoirs, as well as for flow measurement in open channels. Principle and wiring form selection of split type ultrasonic level gauge 1. Two wire system: The power supply (only DC24V) and signal output (D-20mA) of the two wire ultrasonic level gauge share the same circuit, using only two wires, which is a standard transmitter form. 2. Three wire system: The three wire ultrasonic level gauge is actually a four wire system, with separate power supply (only DC24V) and signal output (D-20mA) circuits, each using two wires. When their negative terminals are connected to the ground, three wires are usually used. Its advantage is that it has a high transmission powe…
Description
Introduction: The split type ultrasonic level gauge measures the time required for an ultrasonic pulse to be emitted and returned, and is used for measuring the liquid level and volume of tanks, pools, and reservoirs, as well as for flow measurement in open channels. Principle and wiring form selection of split type ultrasonic level gauge 1. Two wire system: The power supply (only DC24V) and signal output (D-20mA) of the two wire ultrasonic level gauge share the same circuit, using only two wires, which is a standard transmitter form. 2. Three wire system: The three wire ultrasonic level gauge is actually a four wire system, with separate power supply (only DC24V) and signal output (D-20mA) circuits, each using two wires. When their negative terminals are connected to the ground, three wires are usually used. Its advantage is that it has a high transmission power. 3. Four wire system: The power supply (DC24V or AC220V) and signal output (D-20mA) circuits are separated, using two wires. Its advantage is that it has a higher transmission power and provides high and low relay outputs, adding new functions. 4. Measurement range: Select the corresponding model of ultrasonic level gauge based on the actual range. If the liquid being tested fluctuates violently, please choose a model with a range one level larger. The effective range for measuring solid material level is 1/2 to 2/3 of the liquid level range. 5. Power supply form: DC24V power supply: The power supply current capacity provided to the two-wire series should not be less than 30mA. The power supply current capacity provided to the three wire series should not be less than 60mA. The power supply current capacity provided to the four wire series should not be less than 80mA. AC220V power supply: Only four wire series products can be selected, and the power supply current capacity should not be less than 50mA.
