Product Description
Optical DO sensing removes the membranes and electrolyte refills that make traditional probes a chore. The OHAUS Starter 400D portable dissolved oxygen meter is a practical, low-maintenance choice for simple, accurate DO measurement in the field or lab.
This listing is for OHAUS item number 30378542: Starter 400D Optical Dissolved Oxygen Meter ST400D-G, with STDO21 Sensor, 0-20 mg/L. It reads 0.00 to 20.0 mg/L with ±0.2 mg/L accuracy below 8 mg/L and 0 to 50 °C at ±0.3 °C, with automatic barometric pressure measurement, automatic temperature compensation and manual salinity compensation. A backlit color LCD, 99-result memory and last-calibration recall simplify use, and the ABS meter runs on four AAA batteries. The ST400D and ST400D-G include the STDO21 optical sensor; the ST400D-B is meter only. LIGHT LABS supplies the OHAUS line with knowledgeable support from our Englewood, Colorado team.
Key Features
- Optical DO Technology – low-maintenance sensing
- Auto Barometric Compensation – built-in pressure measurement
- Salinity and Temperature Compensation – manual salinity, automatic temperature
- Color Backlit LCD – clear graphical display
- 99-Result Memory – with last calibration data recall
Specifications
| Item Number | 30378542 |
| Brand | OHAUS |
| Description | Starter 400D Optical Dissolved Oxygen Meter ST400D-G, with STDO21 Sensor, 0-20 mg/L |
| Measurement Range | 0.00 – 20.0 mg/L(ppm);0 – 50°C |
| Measurement Resolution | 0.01 mg/L;0.1%;0.1 °C |
| Accuracy | ±0.2 mg/L(<8 mg/L) or ±0.3 mg/L(8~20 mg/L);±0.3 °C |
| Display | Color LCD Graphics |
| Electrode | STDO21 (Included) |
| Accuracy DO | 0.2 ppm |
| Accuracy ± (Temperature) | 0.3 °C |
| Battery Life | 12 hours with Disposable Batteries |
| Calibration | 2 Point |
| Dimensions | 5.91 in x 1.38 in x 3.54 in (150 mm x 35 mm x 90 mm) (LxHxW) |
| In-Use Cover | No |
| Measurement Range DO | 0 ppm – 20 ppm |
| Measurement Range (Temperature) | 0 °C – 50 °C |
| Net Weight | 0.35 lb (0.16 kg) |
| Parameter | Dissolved Oxygen |
| Power | 4 AAA (LR03) Batteries (Included) |
| Resolution (DO) | 0.01 |
| Temperature compensation | Automatic |
| Temperature resolution | 0.1 °C |
Related Models
- 30378543 – Starter 400D Optical Dissolved Oxygen Meter ST400D, with STDO21 Sensor, 0-20 mg/L
- 30378541 – Starter 400D Optical Dissolved Oxygen Meter ST400D-B, Meter Only, 0-20 mg/L
Applications
- Aquaculture
- Wastewater treatment
- Environmental monitoring
- BOD sample checks
- Teaching labs
