diff --git a/main.py b/main.py
index 0c85b3a..1624859 100644
--- a/main.py
+++ b/main.py
@@ -2,6 +2,7 @@ import pygame
 import numpy as np
 import matplotlib.pyplot as plt
 from particle import Particle
+from sensor import Sensor
 
 pygame.init()
 
@@ -12,8 +13,7 @@ SCREEN_HEIGHT = 600
 
 screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
 
-sensor1 = pygame.Rect(200, 200, 50, 200)
-
+sensor = Sensor(width = 50, distance = 200, space = 200)
 
 silica = Particle(speed = 1, size = 20, perm = 4)
 
@@ -22,11 +22,12 @@ time_data = []
 volume_data = []
 
 
+
 plt.ion()
 fig, ax = plt.subplots()
 line, = ax.plot([], [], 'r-')
-ax.set_xlim(0, 1)
-ax.set_ylim(0, 30000)
+ax.set_xlim(0, 400)
+ax.set_ylim(0, 40000)
 ax.set_xlabel('Time (s)')
 ax.set_ylabel('Volume')
 ax.set_title('Volume/time')
@@ -45,7 +46,7 @@ while run:
 
   screen.fill((0,0,0))
 
-  pygame.draw.rect(screen, (255,0,0), sensor1)
+  sensor.generate(SCREEN_WIDTH, SCREEN_HEIGHT, screen)
 
   pygame.draw.circle(screen, (255, 255, 255), (distance - silica.size, 300), silica.size)
 
@@ -53,17 +54,7 @@ while run:
     if event.type == pygame.QUIT:
       run = False
 
-  if silica.size >= abs(200 - (distance - silica.size)):
-    pygame.draw.circle(screen, (0,255,0),(100, 100), 50)
-    volume = silica.partialVol(abs(200 - (distance - silica.size)))
-  elif silica.size >= abs(250 - (distance - silica.size)):
-    pygame.draw.circle(screen, (0,255,0),(100, 100), 50)
-    volume = silica.volume - silica.partialVol(abs(250 - (distance - silica.size)))
-  elif ((distance - silica.size) >= 200 and (distance - silica.size) <= 250):
-    pygame.draw.circle(screen, (0,255,0),(100, 100), 50)
-    volume = silica.volume
-  else:
-    volume = 0
+  volume = sensor.testSensor1(distance, silica)
 
   time_data.append(time)
   volume_data.append(volume)
@@ -79,7 +70,7 @@ while run:
 
   time = time + 1
 
-  print(volume_data)
+  print(volume)
 
 
   
diff --git a/sensor.py b/sensor.py
new file mode 100644
index 0000000..61ce981
--- /dev/null
+++ b/sensor.py
@@ -0,0 +1,34 @@
+import pygame
+
+class Sensor:
+  def __init__(self, width, distance, space):
+    self.width = width
+    self.distance = distance
+    self.space = space
+    
+  def generate(self, screenWidth, screenHeight, screen):
+    self.sensor1_x = (screenWidth / 2) - (self.space / 2)
+    self.sensor1_y = 0
+    self.sensor1_x_size = self.width
+    self.sensor1_y_size = (screenHeight / 2) - (self.distance / 2)
+
+    self.inner1 = self.sensor1_x
+    self.outer1 = self.inner1 + self.width
+    
+    sensor1a = pygame.Rect(self.sensor1_x, self.sensor1_y, self.sensor1_x_size, self.sensor1_y_size)
+    sensor1b = pygame.Rect(self.sensor1_x, self.sensor1_y + self.sensor1_y_size + self.distance, self.sensor1_x_size, self.sensor1_y_size)
+    pygame.draw.rect(screen, (0, 0, 255), sensor1a)
+    pygame.draw.rect(screen, (0, 0, 255), sensor1b)
+
+  def testSensor1(self, partCenter, particle):
+    if particle.size >= abs(self.inner1 - (partCenter - particle.size)):
+      volume = particle.partialVol(particle.size - (self.inner1 - (partCenter - particle.size)))
+      return volume
+    elif particle.size >= abs(self.outer1 - (partCenter - particle.size)):
+      volume = particle.volume - particle.partialVol(particle.size - (self.outer1 - (partCenter - particle.size)))
+      return volume
+    elif ((partCenter - particle.size) >= self.inner1 and (partCenter - particle.size) <= self.outer1):
+      volume = particle.volume
+      return volume
+    else:
+      return 0
\ No newline at end of file