Extech 412440-S - Calibration Source Checker

Easy to use pocket checker for simulating Current Loops

Features:

• Pocket Checkers are easy to use and provide a quick and easy way for checking calibration of meters or controllers
• Instantly determine if your device needs calibration or if sensor needs to be replaced
• 0.1mA accuracy
• Current: 4mA, 12mA and 20mA; Overload indication when load exceeds 240Ohm