Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
OHAUS ST300D-B Handheld Dissolved Oxygen Meter - Handheld Dissolved Oxygen Meters
OHAUSHandheld Dissolved Oxygen Meters

OHAUS ST300D-B Handheld Dissolved Oxygen Meter

The OHAUS ST300D-B is a handheld dissolved oxygen meter that measures DO concentration up to 400% with ±1% accuracy and 1% resolution, plus temperature with 0.3°C accuracy. It includes (4) AAA batteries for operation.

SKU 3G-OTH-380788

Also listed as: ST300DB · ST300D B

Brand
OHAUS
Item
ST300D-B Handheld Dissolved Oxygen Meter
Part Number
ST300D-B
Category
Handheld Dissolved Oxygen Meters
Available to Order
Also known as:ST300D-BOHAUS
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

OHAUS
Manufacturer Part Number
ST300D-B
Type
400% DO Concentration - Max, ±1% DO Accuracy
Includes
(4) AAA Batteries
DO Accuracy
±1%
DO Resolution
1%
Temp Accuracy
0.3°C

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

OHAUS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OHAUS ST300D-B is a handheld dissolved oxygen meter that measures DO concentration up to 400% with ±1% accuracy and 1% resolution, plus temperature with 0.3°C accuracy. It includes (4) AAA batteries for operation.

Frequently Asked Questions

What is the OHAUS ST300D-B dissolved oxygen meter used for?

The OHAUS ST300D-B is a handheld meter for measuring dissolved oxygen concentration in water, up to 400% saturation, with ±1% accuracy. It is used in wastewater treatment, aquaculture, environmental monitoring, and laboratory testing to assess water quality and oxygen levels.

What are the specifications of the OHAUS ST300D-B?

The OHAUS ST300D-B measures dissolved oxygen concentration up to 400% with ±1% accuracy and 1% resolution. Temperature accuracy is 0.3°C. It includes (4) AAA batteries. The manufacturer part number is ST300D-B.

Where to buy the OHAUS ST300D-B worldwide?

You can source the OHAUS ST300D-B through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time.

How to calibrate the OHAUS ST300D-B dissolved oxygen meter?

To calibrate the OHAUS ST300D-B, perform a one-point calibration in water-saturated air or a zero-point calibration using a sodium sulfite solution. Follow the manufacturer's instructions for probe preparation and ensure stable readings before confirming calibration.

Used in

Common applications for OHAUS
Pharmaceutical quality control — OHAUS Defender 5000 bench scale for raw material weighing with RS-485 data logging
Environmental water testing — OHAUS ST300D-B handheld dissolved oxygen meter for field DO and temperature measurement
Food processing — OHAUS CX1201 portable balance for portion control and ingredient weighing in dry environments
Laboratory sample preparation — OHAUS modular dry bath block for heating 15 mL tubes in molecular biology protocols
Industrial production — OHAUS D33P75B1R1 bench scale with RS-232 for checkweighing in packaging lines
Histology lab — OHAUS stainless steel tube rack for slide staining and sample organization
Not sure this is the right part? Photo-identify it

OHAUS Products

3G Electric supplies OHAUS handheld dissolved oxygen meters. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from OHAUS

View all OHAUS parts
OHAUS
OHAUS
Handheld dissolved oxygen meter measuring DO concentration up to 200% max with 0.01 mg/L resolution and ±0.2 mg/L accuracy. Includes STDO21 electrode. Temperature accuracy of 0.3°C. Suitable for field water testing applications
OHAUS
OHAUS
Handheld meter for measuring dissolved oxygen concentration in water. Measures DO up to 200% with 0.01 mg/L resolution and ±0.2 mg/L accuracy. Temperature accuracy is 0.3°C. Includes (4) AAA batteries. Suitable for field testing in water quality monitoring
OHAUS
OHAUS
Handheld dissolved oxygen meter measures DO concentration up to 200% with 0.01 mg/L resolution and ±0.2 mg/L accuracy. Temperature accuracy is 0.3°C. Includes (4) AAA batteries. Suitable for field or laboratory water testing

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first