Overview
After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in the form of a portable dissolved oxygen (DO) meter. This portable meter offers convenience, reliability and durability in one compact design.
Models
![]()
Ohaus
SKU:
oh-30031655
|
Starter 300D Do Portable St300D Specifications |
|
---|---|
Accuracy | ± 1%; ± 0.3 mg/L; ±0.3 °C |
Accuracy (Temperature) | 0.3 °C |
Accuracy DO | 1 % |
Auxiliary Display Model | LCD |
Battery Life | 250 Hours with Disposable Batteries |
Internal Calibration | 2 Point |
Electrode | STTEMP30 (Included); STDO11 (Included) |
In Use Cover | No |
Measurement Range | 20.0 – 45.0 mg/L; 0.00 – 19.99; 200 – 400%; 0 – 50°C |
Measurement Range (Temperature) | 0 °C ; 50 °C |
Measurement Range DO | 0 % ; 200 % ; 200 % ; 400 % ; 0 ppm ; 20 ppm ; 20 ppm ; 45 ppm |
Measurement Resolution | 0.1%; 1%; 1 mg/L; 0.1 °C; 0.1 ppm; 1 ppm; 0.1 mg/L |
Net Weight | 0.35 lb (0.16 kg) |
Parameter | Dissolved Oxygen |
Resolution (DO) | 0.01; 0.1 |
Resolution Range (DO) | 0 ; 19.9 ; 20 ; 45 |
Temperature Compensation | Yes |
Temperature Resolution | 0.1 °C |
Temperature Sensor | 30 KΩ NTC |
Working Environment | 41°F – 104°F, 80% RH, Non-condensing (5°C – 40°C, 80% RH, Non-condensing) |

Ohaus
St300D-B
SKU:
oh-30031656
Femto Price: $535.00
×
Starter 300D Do Portable St300D-B Specifications |
|
---|---|
Accuracy | ± 1%; ± 0.3 mg/L; ±0.3 °C |
Accuracy (Temperature) | 0.3 °C |
Accuracy DO | 1 % |
Auxiliary Display Model | LCD |
Battery Life | 250 Hours with Disposable Batteries |
Internal Calibration | 2 Point |
Electrode | STTEMP30 (Available as an accessory); STDO11 (Available as an accessory) |
In Use Cover | No |
Measurement Range | 20.0 – 45.0 mg/L; 0.00 – 19.99; 200 – 400%; 0 – 50°C |
Measurement Range (Temperature) | 0 °C ; 50 °C |
Measurement Range DO | 0 % ; 200 % ; 200 % ; 400 % ; 0 ppm ; 20 ppm ; 20 ppm ; 45 ppm |
Measurement Resolution | 0.1%; 1%; 1 mg/L; 0.1 °C; 0.1 ppm; 1 ppm; 0.1 mg/L |
Net Weight | 0.35 lb (0.16 kg) |
Parameter | Dissolved Oxygen |
Resolution (DO) | 0.01; 0.1 |
Resolution Range (DO) | 0 ; 19.9 ; 20 ; 45 |
Temperature Compensation | Yes |
Temperature Resolution | 0.1 °C |
Temperature Sensor | 30 KΩ NTC |
Working Environment | 41°F – 104°F, 80% RH, Non-condensing (5°C – 40°C, 80% RH, Non-condensing) |

Ohaus
St300D-G
SKU:
oh-30219116
Femto Price: $1,016.00
×
Starter 300D Do Portable St300D-G Specifications |
|
---|---|
Accuracy | ± 1%; ± 0.3 mg/L; ±0.3 °C |
Accuracy (Temperature) | 0.3 °C |
Accuracy DO | 1 % |
Auxiliary Display Model | LCD |
Battery Life | 250 Hours with Disposable Batteries |
Internal Calibration | 2 Point |
Electrode | STTEMP30 (Included); STDO11 (Included) |
In Use Cover | No |
Measurement Range | 20.0 – 45.0 mg/L; 0.00 – 19.99; 200 – 400%; 0 – 50°C |
Measurement Range (Temperature) | 0 °C ; 50 °C |
Measurement Range DO | 0 % ; 200 % ; 200 % ; 400 % ; 0 ppm ; 20 ppm ; 20 ppm ; 45 ppm |
Measurement Resolution | 0.1%; 1%; 1 mg/L; 0.1 °C; 0.1 ppm; 1 ppm; 0.1 mg/L |
Net Weight | 0.35 lb (0.16 kg) |
Parameter | Dissolved Oxygen |
Resolution (DO) | 0.01; 0.1 |
Resolution Range (DO) | 0.01 ; 0.1 |
Temperature Compensation | Automatic |
Temperature Resolution | 0.1 °C |
Temperature Sensor | 30 KΩ NTC |
Working Environment | 41°F – 104°F, 80% RH, Non-condensing (5°C – 40°C, 80% RH, Non-condensing) |