| Model | 
    CS-20 (for HAL-321), CS-40 (for HAL-320W) | 
  
  
    | LCD | 
    Digital 3.5 digit  | 
  
  
    | Display range *1 | 
    0.000 - 1.999 (SUN) | 
  
  
    | Over range display | 
    1._ (_ is blank)  | 
  
  
    | Detector | 
    Silicon photo diode (for CS-20) / Silicon photo diode and InGaAs PIN diode (for CS-40) | 
  
  
    | M27 thread part | 
    Filter holder mounting position *2 | 
  
  
    |   | 
    Usable filter size: 25mm dia. / Thickness: below 6mm  | 
  
  
    | Output range | 
    1mV/digit (Above 2V is not covered under warranty) | 
  
  
    | Maximum saturation voltage | 
    Below +5V  | 
  
  
    | Connected load | 
    More than 100kΩ, less than 500pF | 
  
  
    | Power source | 
    006P(9V) battery x 1  | 
  
  
    | Fuse | 
    250mA | 
  
  
    | Recommended environment | 
    Temperature 23 deg C ±5 deg C | 
  
  
    |   | 
    Humidity 30 - 80% (Avoid condensation)  | 
  
  
    | Dimensions | 
    Controller 66.5(W) x 112(D) x 28(H)mm  | 
  
  
    |   | 
    Sensor head 35(W) x 50(D) x 15(H)mm (CS-20) / 35(W) x 50(D) x 22.5(H)mm (CS-40) | 
  
  
    | Weight | 
    225g (CS-20) / 250g (CS-40)  | 
  
  
    | Standard accessory | 
    3.5mm dia. mini plug cable  |