Ohaus Portable Meter ST400D-B; STDO21 Optical DO, Portable Bag 30378542

The Ohaus Portable Meter ST400D-B with STDO21 Optical DO Probe (part number 30378542) is a portable dissolved oxygen meter designed for accurate and convenient measurement of dissolved oxygen levels in water, suitable for field and laboratory testing.

Key Features:

• Measurement Range: 0.00 to 20.0 mg/L (ppm) dissolved oxygen; 0 to 50 °C temperature range
• Accuracy: ±0.2 mg/L for DO concentrations below 8 mg/L; ±0.3 mg/L for 8 to 20 mg/L; temperature accuracy ±0.3 °C
• Measurement Resolution: 0.01 mg/L DO; 0.1 °C temperature
• Electrode Included: STDO21 Optical Dissolved Oxygen Probe
• Display: Large backlit color LCD screen for easy reading
• Calibration: 2-point calibration
• Power: Operates on 4 AAA (LR03) batteries (included), providing approximately 12 hours battery life
• Temperature Compensation: Automatic with manual salinity compensation
• Memory: Stores up to 99 measurements with last calibration data recall
• Construction: Portable, lightweight, with IP54 rated ABS housing and supplied portable bag
• Dimensions: 5.91 in x 1.38 in x 3.54 in (150 mm x 35 mm x 90 mm)
• Net Weight: 0.35 lb (0.16 kg)

Advantages:

• Wide DO and temperature measurement range supports diverse water quality testing conditions
• High accuracy and fine resolution ensure reliable data for critical dissolved oxygen monitoring
• Optical DO probe requires minimal maintenance and provides immediate measurement without warm-up
• Backlit LCD enhances visibility in low-light field or lab environments
• Battery-operated design with included batteries allows extended portable use without external power
• Memory function and calibration recall enable efficient data logging and quality control
• Compact, durable form factor with IP54 housing and carrying bag supports rugged field applications