# 2.3.2 Analog output This product also has a built-in 4-20-milliampere analog power output signal which provides analog output of the measured values. It is used as follows: ● Outputs include flow rate, flow velocity, upstream temperature, downstream temperature, liquid sound velocity, and upstream/downstream temperature differential. ● Upper and lower limits can be customized to provide the required range of output. ● The 4-20-milliampere signal is a passive signal that requires an external power source. Please note that an independent power supply must be used. The 4-20-milliampere output signal cannot share power with the instrument; otherwise it may cause instrument burnout! Please wire the positive and negative terminals correctly. The external power supply voltage range is 12 \~ 30 volts DC. 12 volts is recommended; higher voltages may cause the temperature of the instrument to rise. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.lorric.com/qr/fu-tx310-ultrasonic-flowmeter-manual-en-v2/2-installation-method/2.3-temperature-sensor-analog-output/2.3.2-analog-output.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.