Connecting landtek air flow meter to arduino

Projects Programming
1

I have tried multiple ways to connect the output of the landtek air flow meter Manometer Data Logger, Dual-Port Digital Manometer Gas Pressure Tester Support PC Data Records, 13 Selectable Units Differential Pressure Gauge Manometer HVAC with Large LCD Screen: Amazon.com: Industrial & Scientific
to an arduino board and am unable to get any output. Has anyone done this?

2

You can only use an Arduino that can act as a HOST for the USB connection. What did you try?

3

Here is a brief description how USB works.
http://www.linux-usb.org/USB-guide/c15.html

Your flowmeter is a slave and can only comunicate with a host (which is the master)
Your arduino is a slave too.

slave-to-slave-communication does not work.

You need a USB-HOST (= an USB-master) to communicate with your flow-meter.
There are microcontrollers that can act as a USB-Host. They have native USB onboard.
Or you have to use a USB-Host-shield.

The teensy 4.1 has USB-HOST-capability and has throughhole solderpads for connecting a USB-cable.
https://www.pjrc.com/store/cable_usb_host_t36.html

On Github there are example-code for Teendy 4.1

4

From the seller's website:

This Manometer has a capacity of data recording 15,996 groups, and enables communication with PC software for data transfer and device management

That says that the manometer communicates with PC software, It doesn't say that the manometer sends out a stream of data of it's own accord.

Even if you get the issue of the Arduino needing to be a USB host sorted out, you will probably have to send some (unknown) commands to get the manometer to send it's data.