lass="row">
        <div class="input-field col s4">
            <label for="first_name"><b>Temperature</b></label>
            <br>
          <input placeholder="Temperature in Celsius" name="Temperature" id="first_name" type="text" class="validate">
        </div>
        <div class="input-field col s4">

          <label for="last_name"><b>Oxygen </b></label>
            <br>
          <input id="last_name" name="Oxygen" placeholder="Oxygen content in ppm"  type="text" class="validate">

    