Features:

• Easy to use, low cost waterproof pH pens
• Easy to calibrate single CAL key with automatic pH buffer recognition (4,7, and 10pH calibration buffers sold separately)
• Data hold with low battery indicator

Model PH50:

• pH range: 2 to 12pH

Model PH60:

• pH range: 0 to to 14pH
• Temperature range: 32 to 122°F (0 to 50°C)
• Automatic Temperature Compensation
• Dual LCD displays both pH and Temperature readings