The BSWHEM is the specialty hematocrit-tube block in the BSW block family — 48 wells for 1.9 mm OD hematocrit capillary tubes — at $244 ($80 premium over standard $244.00 BSW pricing). Hematocrit tubes are very-narrow capillary tubes used in clinical hematology workflows for blood-cell volume measurement (hematocrit / packed-cell volume tests).
Compatibility warning: Universe label flags "not compatible with cover" — hematocrit tubes are taller than the heated-lid clearance, so this block cannot be used on heated-lid chassis variants. Same compatibility pattern as the BSH100-CV cuvette block.
For full chemistry rationale (BSW family vs BSH100-* family distinction), see the BSW01 (BSW family anchor) page.
Key Specifications
| SKU | BSWHEM |
| Type | Specialty hematocrit-tube BSW block |
| Capacity | 48 × 1.9 mm OD hematocrit capillary tubes |
| Compatible chassis | BSW chasses WITHOUT heated lid (hematocrit tubes too tall for heated-lid clearance) |
| Incompatible chassis | Heated-lid chassis variants |
| Sister specialty cuvette block (different chassis family) | BSH100-CV ($124, BSH dry bath chassis, also heated-lid incompatible) |
| List price | $244 |
Why the $80 Premium
The 1.9 mm bore is substantially smaller than typical block wells — precision micro-machining for capillary-tube fit drives the premium pricing vs standard $244.00 BSW blocks.
When to Pick the Hematocrit Block
Pick the BSWHEM when:
- Workflow is clinical hematology — hematocrit / packed-cell volume measurements
- High-throughput blood-cell volume testing at clinical lab scale (48 simultaneous tubes)
- Standard (non-heated-lid) BSW chassis is the operating chassis
- Workflow uses standard 1.9 mm OD hematocrit tubes
Ordering & Configuration
Confirm chassis compatibility. Critical: confirm BSW chassis is NOT a heated-lid variant before procurement.
Confirm hematocrit tube format. Standard 1.9 mm OD capillary tubes; confirm fit at order if non-standard tube formats.
Pair with BSW chassis (non-heated-lid).
Confirm at quote: chassis compatibility (NOT heated-lid), clinical hematology workflow context, tube format compatibility, and lead time.
Warranty: Per Benchmark Scientific standard accessory terms.
BSW specialty hematocrit block:
- BSWHEM (this product) — 48 × 1.9 mm hematocrit capillary tubes ($244) — clinical hematology; NOT heated-lid compatible
Pick the hematocrit block for clinical hematology workflows on non-heated-lid BSW chassis. See BSW01 anchor for full BSW family detail.
