text: """Support for Aqualink temperature sensors."""
  from __future__ import annotations
  
  from homeassistant.components.sensor import DOMAIN
  from homeassistant.config_entries import ConfigEntry
  from homeassistant.const import DEVICE_CLASS_TEMPERATURE, TEMP_CELSIUS, TEMP_FAHRENHEIT
  from homeassistant.helpers.typing import HomeAssistantType
  
  from . import AqualinkEntity
  from .const import DOMAIN as AQUALINK_DOMAIN
  
  PARALLEL_UPDATES = 0
  
  
  async def async_setup_entry(
      hass: HomeAssistantType, config_entry: ConfigEntry, async_add_entities
  ) -> None:
      """Set up discovered sensors."""
      devs = []
      for dev in hass.data[AQUALINK_DOMAIN][DOMAIN]:
          devs.append(HassAqualinkSensor(dev))
      async_add_entities(devs, True)
  
  
  class HassAqualinkSensor(AqualinkEntity):
      """Representation of a sensor."""
  
      @property
      def name(self) -> str:
          """Return the name of the sensor."""
          return self.dev.label
  
      @property
      def unit_of_measurement(self) -> str | None:
          """Return the measurement unit for the sensor."""
          if self.dev.name.endswith("_temp"):
              if self.dev.system.temp_unit == "F":
                  return TEMP_FAHRENHEIT
              return TEMP_CELSIUS
          return None
  
      @property
      def state(self) -> str | None:
          """Return the state of the sensor."""
          if self.dev.state == "":
              return None
  
          try:
              state = int(self.dev.state)
          except ValueError:
              state = float(self.dev.state)
          return state
  
      @property
      def device_class(self) -> str | None:
          """Return the class of the sensor."""
          if self.dev.name.endswith("_temp"):
              return DEVICE_CLASS_TEMPERATURE
          return None
  