Best way to read/show rotameter info?

ESPHome
1

Hello

As part of a school project, it is necessary to read rotameter information, what would be the best way? I’m thinking of using Opto photo Interrupter . What sensor type in esphome programming would be best to read them? And the best way to show the result ?

thumbnail_rota
thumbnail_rota275×875 32.2 KB

https://www.aliexpress.com/item/32657347266.html?spm=a2g0o.order_list.order_list_main.110.597f1802oWbXwP

2 

binary_sensor:
  - platform: gpio
    pin: GPIO13
    name: "rota015"
    id: "rota015"
  - platform: gpio
    pin: GPIO12
    name: "rota030"
    id: "rota030"
  - platform: gpio
    pin: GPIO14
    name: "rota050"
    id: "rota050"     
  - platform: gpio
    pin: GPIO27
    name: "rota070"
    id: "rota070"  
  - platform: gpio
    pin: GPIO26
    name: "rota090"
    id: "rota090"  
  - platform: gpio
    pin: GPIO25
    name: "rota110"
    id: "rota110"  
  - platform: gpio
    pin: GPIO33
    name: "rota130"
    id: "rota130"  

sensor:
  - platform: template
    name: "Rotameter"
    unit_of_measurement: "L/min"
    accuracy_decimals: 2
    lambda: |-
      if (id(rota015).state) {
        return 0.15;
      } else {
              if (id(rota030).state) {
        return 0.30;
      } else {
              if (id(rota050).state) {
        return 0.50;
      } else {
          if (id(rota070).state) {
        return 0.70;
      } else {
          if (id(rota090).state) {
        return 0.90;
      } else {
              if (id(rota110).state) {
        return 1.10;
      } else {
              if (id(rota130).state) {
        return 1.30;
      } else {
          return 0.0;
       }
       }
       }
       }
       }
      };
      }

    update_interval: 5s