These are compact yet portable TDS Meters with Fast Micro Processors.   They are suitable for a wide range of applications, such as Agriculture and Horticulture, as well as water and environmental analysis. Both models features Automatic Temperature Compensation and have a small, ergonomic and light case design. Other features include large and easy to read LED Display and long battery life. Each meter is supplied complete with a probe with 1 meter cable and calibration solution. 

Features & Specifications:

• MW-401 Range: 0 to 1990 mg/L (ppm)
• MW-401 Resolution: 10 ml/L (ppm)
• MW-402 Range: 0.0 to 10.0 g/L
• MW-402 Resolution: 0.1g/L (ppt)
• Accuracy: +/- 2% Full Scale
• TDS Conversion Factor: 0.5
• Replaceable probes (1 probe included)
• Automatic Temperature Compensation from +5°C to +50°C
• Operating Environment: 0°C to +50°C, Max. 95% RH
• Battery: 1 x 9V alkaline, 300 hours of use
• MW-401 is supplied complete with 20 mL 1382 ppm sachet of calibration solution, screwdriver for calibration, 9V battery and instructions
• MW402 is supplied complete with 20 mL 6.44 ppt sachet of calibration solution, screwdriver for calibration, 9V battery and instructions

NOTE: MW-401 is available as a bench model with a 9 VDC power supply, mounting kit and probe holder, Part#: MW-BEM401 - inquire about pricing