What is this? I have a question!
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The speed probe is connected to that module with a digital display. May I ask what this module with a digital display is?
Signal conversion module: the speed probe generates pulse signals, and this module converts them into 4-20mA signals for output, along with on-site indication
This tachometer seems a bit complex, being both a digital display and requiring a DC power supply. For measuring rotational speed, the commonly used models are the Bently 2300, as well as the Pallis TR4105 or TR5102; these models are available in two-wire or four-wire configurations. This is an imported brand; the domestically produced Wuxi Houdé model is also widely used. The configuration includes: an 8mm probe + extension cable + (preamplifier) + speed transmitter, with a direct output of 4-20mA
There are many names for it; you can call it an on-site indication of rotational speed, or simply an on-site secondary meter.
It should be a four-channel digital tachometer.
Tachometer, usually installed on-site
Seeing your messages, I truly feel that my knowledge is too limited