Microhematocrit Capillary Tubes, 100% Plastic, Color-Coded — 1000 Tubes/Vial
The Globe Scientific Microhematocrit Capillary Tubes are 100% plastic, shatter-resistant tubes engineered for safe packed-cell-volume (PCV) determination and capillary blood handling. Color coding by tube simplifies protocol identification at the bench, while the all-plastic construction eliminates the breakage and biohazard exposure associated with glass capillaries during fingerstick collection and centrifugation.
Technical Specifications
| Product Type | Microhematocrit Capillary Tube |
|---|---|
| Volume/Size | Standard microhematocrit format (~75 mm length) |
| Material | 100% Plastic, shatter-resistant |
| Closure/Cap | Open-ended capillary (compatible with sealing clay) |
| Graduation | None (read with microhematocrit reader) |
| Sterility | Non-sterile |
| Pack Size | 1000 tubes per vial |
Available Colors
| Color | SKU | Price (per vial of 1000) |
|---|---|---|
| Red Tip, Sodium Heparinized — Box of 1000 | 51686 | $293.60 |
| Green Tip, Ammonium Heparinized — Box of 1000 | 51684 | $293.60 |
| Blue Tip, Plain — Box of 1000 | 51680 | $293.60 |
Applications
- Microhematocrit (packed cell volume) determination after centrifugation
- Capillary blood collection from fingerstick or heelstick samples
- Color-coded sorting of patient or assay groups at the bench
- Point-of-care hematology testing in clinical and research labs
- Veterinary PCV analysis on small-volume blood draws
- Teaching and training labs where glass breakage poses a safety risk
Chemical Resistance
| Reagent Class | Compatibility |
|---|---|
| Aqueous buffers | Excellent |
| Dilute acids | Good |
| Dilute bases | Good |
| Alcohols | Good |
| Acetonitrile | Limited |
| Aromatic solvents | Not recommended |
| Chlorinated solvents | Not recommended |
Quality & Procurement
Purchased through labsupplies.com, an authorized Globe Scientific dealer shipping from US inventory. Each vial carries a lot number to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact our procurement team for volume quotes across all three color SKUs.
Frequently Asked Questions
Are these capillary tubes heparinized?
These tubes are the 100% plastic plain (non-heparinized) configuration. For anticoagulated capillary collection, confirm the required heparin-coated variant with our team before ordering.
Why choose plastic over glass microhematocrit tubes?
All-plastic tubes are shatter-resistant, which reduces the risk of cuts and bloodborne-pathogen exposure during fingerstick collection and centrifugation. They are well suited to teaching labs and high-throughput settings.
How are the tubes sealed before centrifugation?
Open-ended microhematocrit tubes are typically sealed at one end with standard capillary sealing clay or putty prior to spinning, then read against a microhematocrit reader card.
What does the color coding indicate?
Color (red, green, or blue) is provided for visual identification and bench organization rather than a chemical additive designation. Choose colors to match your internal sample-tracking protocol.