Globe Scientific

Globe Scientific Diamond SureFlow Bottle Top Dispenser with Recirculation - GBTD-R Series | Zero-Waste Priming

$325.12

~~$406.40~~ $325.12

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Volume Range 0.25 – 2.5 mL 0.5 – 5 mL 1 – 10 mL 2.5 – 25 mL 2.5 – 30 mL 5 – 50 mL 5 – 60 mL 10 – 100 mL

Quantity

Every milliliter of reagent lost during priming is money down the drain — and for labs working with costly enzymes, rare solvents, or limited-batch solutions, those losses add up to hundreds of dollars a month. The Globe Scientific Diamond SureFlow Bottle Top Dispenser with Recirculation (GBTD-R Series) solves this by routing priming fluid back into the source bottle instead of expelling it as waste. This recirculation pathway means you achieve air-free, bubble-free dispensing without sacrificing a single drop of your valuable reagent. Built on the same proven platform as the standard SureFlow, the recirculating model features a springless valve for enhanced chemical resistance, a unique piston design that allows cleaning without disturbing calibration, and a volume lock to prevent accidental setting changes. Available in eight volume ranges from 0.25 mL up to 100 mL, each unit includes four bottle thread adapters (28 mm, 33 mm, 36 mm, and 38 mm), a telescopic fill tube for bottles 170–300 mm tall, and dual graduations for fast, accurate reads. The full 360° dispensing rotation and ergonomic one-hand operation make high-throughput dispensing efficient and comfortable, while the fully autoclavable construction at 121 °C ensures complete decontamination between reagent changeovers.

Features and Benefits

Recirculation Pathway — Zero Reagent Loss During Priming: Unlike standard dispensers that expel priming fluid as waste, the GBTD-R returns priming reagent directly to the source bottle. This is critical for labs dispensing expensive enzymes, isotope-labeled solutions, or rare solvents where even small losses are unacceptable.
Springless Valve with Superior Chemical Resistance: The valve mechanism contains no metal springs, eliminating the most common corrosion failure point in bottle top dispensers. This extends the service life significantly when dispensing corrosive acids, strong bases, and organic solvents.
Calibration-Preserving Piston: Remove, clean, and reassemble the piston without resetting the calibration. When recalibration is eventually needed, it requires only a single tool — the GBTD-CALTOOL calibration tool available separately.
Fully Autoclavable at 121 °C: Sterilize the complete dispenser assembly in a standard laboratory autoclave cycle. Essential for GMP environments, cell culture media preparation, and any application requiring sterile dispensing.
Volume Lock and Dual Graduations: Lock the dispensing volume in place to prevent accidental changes during repetitive operations. Dual graduation scales on the cylinder allow quick reads from either side, reducing measurement uncertainty.
360° Dispensing Rotation: Rotate the discharge nozzle a full circle to fill multiple receiving vessels arranged around the bottle, eliminating the need to reposition the reagent container during high-throughput workflows.
Telescopic Fill Tube Included: The adjustable fill tube accommodates reagent bottles ranging from 170 mm to 300 mm in height, so one dispenser works across your entire bottle inventory without additional accessories.
2-Year Manufacturer Warranty: Globe Scientific backs the Diamond SureFlow recirculation model with a full two-year warranty covering manufacturing defects and component failures under normal laboratory use.

Specifications

Property	Value
SKU Range	GBTD-R-2.5, GBTD-R-05, GBTD-R-10, GBTD-R-25, GBTD-R-30, GBTD-R-50, GBTD-R-60, GBTD-R-100
Brand	Globe Scientific
Product Line	Diamond® SureFlow™
Model Type	Recirculation (priming returns to bottle)
Volume Ranges Available	0.25–2.5 mL, 0.5–5 mL, 1–10 mL, 2.5–25 mL, 2.5–30 mL, 5–50 mL, 5–60 mL, 10–100 mL
Graduation Increments	0.05 mL (2.5 mL), 0.1 mL (5 mL), 0.2 mL (10 mL), 0.5 mL (25/30 mL), 1.0 mL (50/60 mL), 2.0 mL (100 mL)
Valve Type	Springless
Autoclavable	Yes (121 °C)
Included Thread Adapters	28 mm, 33 mm, 36 mm, 38 mm
Fill Tube	Telescopic, adjustable for bottles 170–300 mm tall
Recirculation Tube	Included (replacement available as GBTD-TUBE-RECIRC)
Sterility	Non-Sterile
Unit of Measure	Each (EA)
Warranty	2 Years
Country of Origin	India

Laboratory Applications

Dispensing high-cost reagents such as molecular biology enzymes, isotope-labeled compounds, and custom-synthesized solutions where the recirculation feature eliminates priming waste and preserves limited reagent inventory
Cell culture media preparation in tissue culture facilities and GMP environments, where autoclavable construction and zero-waste priming support both sterility requirements and cost control on specialty media
Clinical and diagnostic laboratories dispensing controlled reagents from stock bottles into assay plates and test tubes, where the volume lock and recirculation path prevent both volume errors and reagent waste
Organic chemistry and synthetic chemistry labs handling volatile solvents where the recirculation design reduces exposure to fumes during the priming step by keeping solvent contained within the closed bottle system
Pharmaceutical quality control and stability testing workflows where audit traceability requires precise, documented volumes and contamination-free autoclave cycles between each reagent lot

Frequently Asked Questions

How does the recirculation feature work on the GBTD-R dispenser?
When you prime the dispenser, the reagent travels through the dispensing cylinder and then returns to the source bottle through a dedicated recirculation tube instead of being expelled out the discharge nozzle. This closed-loop priming eliminates reagent waste entirely. Once priming is complete, you switch to normal dispensing mode and the reagent flows out the discharge tube as usual.

Can I replace the recirculation tube if it becomes damaged or chemically degraded?
Yes. Globe Scientific sells replacement recirculation tubes separately under SKU GBTD-TUBE-RECIRC. Replacing the tube is a quick, tool-free process that does not affect the dispenser's calibration or valve assembly.

Is the recirculation model compatible with the same bottle thread adapters as the standard model?
Yes. Both the standard (GBTD) and recirculation (GBTD-R) models ship with identical 28 mm, 33 mm, 36 mm, and 38 mm thread adapters. The optional 40 mm and 45 mm adapters (GBTD-ADP-40 and GBTD-ADP-45) also fit both models.

What volume ranges are available in the recirculation series?
The GBTD-R series covers the same eight volume ranges as the standard line: 0.25–2.5 mL, 0.5–5 mL, 1–10 mL, 2.5–25 mL, 2.5–30 mL, 5–50 mL, 5–60 mL, and 10–100 mL. Graduation increments match the volume range — for example, the 0.25–2.5 mL model has 0.05 mL increments while the 10–100 mL model has 2.0 mL increments.

Is the GBTD-R bottle top dispenser autoclavable?
Yes. Like the standard model, the recirculation dispenser is fully autoclavable at 121 °C (250 °F). The recirculation tube should be autoclaved along with the main unit to ensure complete decontamination of the return path.

Quality Assurance

Globe Scientific products are manufactured under strict ISO 9001:2015 certified quality systems. Designed to meet the demanding requirements of clinical and research laboratories, these products undergo rigorous inspection to ensure consistent performance and reliability.