KWolfe81
Member
Hi guys - long shot help request.... I'm using an Ultrasonic Flow Meter to measure flow through my UV sterilizer. I got it off AliExpress - it's the TUF-2000B with TS2. I'm pretty thrilled with it, really. Accuracy seems spot on & it's got a lot of bells and whistles, including alarm settings, ModBus output (which I already connected to an ESP32 & HomeAssistant), and a relay output which I wired up to automatically turn off the UV Sterilizer if flow gets too low.
Anyways, it also features a 4mA to 20mA output and I thought it would be great to connect this thing to Hydros. However, being from AliExpress/China, the manual is... not great. Here's the wiring interface:
There's also this:
I was thinking of throwing a resistor across the analog output and feeding that to a Sense input. Through the device menu, I can change what flow rates correspond to 4mA and 20mA (GREAT!). However, there's no real description on what 'active' vs. 'passive' output is. Plus, I'm not 100% which pin (23, 24, 25) should be used for tying Hydros ground to device ground. I am hoping maybe someone here might be able to interpret these figures better than I can.
Just for completeness, I can change the analog output modes as follows (Mxx corresponds to commands I can issue to the device):
Anyways, it also features a 4mA to 20mA output and I thought it would be great to connect this thing to Hydros. However, being from AliExpress/China, the manual is... not great. Here's the wiring interface:
There's also this:
I was thinking of throwing a resistor across the analog output and feeding that to a Sense input. Through the device menu, I can change what flow rates correspond to 4mA and 20mA (GREAT!). However, there's no real description on what 'active' vs. 'passive' output is. Plus, I'm not 100% which pin (23, 24, 25) should be used for tying Hydros ground to device ground. I am hoping maybe someone here might be able to interpret these figures better than I can.
Just for completeness, I can change the analog output modes as follows (Mxx corresponds to commands I can issue to the device):