Comparison : Item # 2513KP, 15" Display Y-Purge Class I, Division 1 Hazardous Area Monitor with 28-Key Keypad
Item # 2516KP, 19" Display Y-Purge Class I, Division 1 Hazardous Area Monitor with 28-Key Keypad
Item # 2519KP, 21.5" Display Y-Purge Class I, Division 1 Hazardous Area Monitor with 28-Key Keypad
Item # 2613, 15" Display Y-Purge Class I, Division 1 Hazardous Area Monitor with Integrated Keyboard
Item # 2616, 19" Display Y-Purge Class I, Division 1 Hazardous Area Monitor with Integrated Keyboard