The Ohaus Starter 400D Optical DO Portable Meter (ST400D) is a high-performance, low-maintenance dissolved oxygen meter using optical methodology for accurate, immediate readings without warm-up or sample preparation. This configuration includes the STDO21 optical dissolved oxygen probe.
DO Range
0.0 to 20.0 mg/L; 0 to 200% saturation
Resolution
0.1 mg/L; 0.1%
Sensor Type
Optical (luminescence), no warm-up required
Memory
99-measurement library
Housing
IP54 with meter stand and wrist strap
Frequently Asked Questions
Q: Does the optical DO probe require maintenance? A: It requires minimal maintenance compared to traditional galvanic or polarographic probes, and offers immediate readings with no warm-up.
Q: Can I use it outdoors or in low light? A: Yes, the large backlit LCD screen is easy to read even in low-light field environments.
Q: How much data can it store? A: Up to 99 measurements are stored for future reference with one-touch recall of the last calibration data.
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