The Benchmark Industrial BenchMasher 400 Paddle Blender is a stomacher-class paddle blender for contamination-free mixing and homogenization of samples up to 400 mL in sterile blender bags. The BenchMasher is engineered for pathogen and microbial detection workflows in food, water, and environmental sampling — and broader sample-prep workflows where larger solid samples need broken down or powders / polymers need mixed without direct chamber contact.
Per brochure: *"The BenchMasher provides fast and effective mixing, ensuring consistent homogenization. It is ideal for preparation of samples where eliminating contamination is critical, such as pathogen and microbial detection in food and water filters."*
Voltage options: This unit can be ordered with European voltage requirements (230V/50Hz). Contact us to order.
Key Specifications
| SKU | IPD4400 |
| Type | Paddle blender (stomacher-class) for sterile-bag homogenization |
| Sample volume | Up to 400 mL in sterile blender bags |
| Speed / increments | 3 to 12 SPS (strokes per second) |
| Timer | 1 sec to 100 min, or continuous |
| Paddle distance | 0 to 50 mm (adjustable stroke length) |
| Temperature range | RT – 65 °C (heated chamber for thermal-regulated workflows) |
| Bag size accommodated | 16–18 cm (W) × 25–30 cm (H) |
| UV decontamination | Built-in 254 nm UV bulb for chamber decontamination |
| Ambient operating temp | 2 °C – 35 °C |
| Display / control | Large full-color touch screen |
| Door | Removable for chamber access; rubber paddle covers easily removed/replaced |
| Voltage | 120 V or 220 V — confirm plug type at order |
Why a Paddle Blender — Contamination-Free Sample Homogenization
Traditional sample homogenization (rotor-stator homogenizers, blenders with direct sample contact) introduces cross-contamination risk between samples — the homogenizer's mixing surfaces contact the sample directly and require cleaning / sterilization between runs.
The paddle blender (stomacher class) workflow eliminates this risk:
- Sample is loaded into a sterile single-use blender bag
- The blender bag is sealed and placed in the chamber
- The chamber's stainless steel paddles strike the bag externally — paddles never directly contact the sample
- Bag is removed and discarded (or sample is recovered through the bag opening)
Workflow advantages:
- No cross-sample contamination — paddles never touch the sample
- No between-run cleaning of mixing surfaces — only the chamber requires periodic cleaning
- Sterile sample workflow — bags ship sterile, supporting pathogen / microbial detection workflows where contamination would invalidate results
- Faster batch throughput — no inter-sample sterilization downtime
Application Profile
Pathogen and microbial detection in food and water filters — the workhorse application. Contamination-free homogenization is critical for accurate pathogen quantification in regulated food / water testing workflows.
Trichinella testing in meat — thermal-regulated chamber (heated to 65 °C) supports Trichinella digestion protocol per regulated testing methods.
Large solid sample breakdown — meat / produce / soil / biological-material homogenization where direct-contact blenders would introduce contamination.
Powder and polymer mixing — homogenization of powder / polymer samples without rotor-stator contact.
QuEChERS sample prep — pesticide / contaminant analysis sample preparation where bag-based mixing supports standardization workflows.
Forensic sample homogenization — contamination-free sample workflow for forensic chain-of-custody integrity.
Cannabis testing labs — homogenization of cannabis samples for downstream testing where bag-based workflow reduces contamination risk.
Environmental sample prep — soil / sediment / water-filter homogenization for environmental testing.
Blender Bag Family — Choose the Right Bag
The IPD4400 BenchMasher requires sterile blender bags matched to the workflow. Three bag variants in the catalog:
| SKU | Bag spec | Filter type | Best for |
| IPD4400-B400 | 400 mL × 60 µm, 300 × 180 mm | No filter | Standard homogenization (no liquid-phase separation) |
| IPD4400-B400F1 | 400 mL × 70 µm, 300 × 190 mm | Lateral (side) nylon filter | Side-filter sample-prep workflows where filtrate is recovered through side filter |
| IPD4400-B400F2 | 400 mL × 70 µm, 300 × 190 mm | Full nylon filter | Full-filter sample-prep workflows where homogenate is filtered before recovery |
All bags ship in 500-pack (10 packs of 50). Workflow-recurring consumable; plan replenishment per workflow throughput.
Frequently Asked Questions
What sample volume does the BenchMasher 400 handle? Up to 400 mL in sterile blender bags, accommodating bag sizes of 16–18 cm (W) × 25–30 cm (H).
What speed and timing settings are available? Variable speed from 3 to 12 strokes per second (SPS), with a timer from 1 second to 100 minutes or continuous. Paddle stroke length is adjustable from 0 to 50 mm.
Can the chamber be heated for Trichinella testing? Yes. The heated chamber reaches RT–65 °C, supporting thermal-regulated workflows such as the Trichinella digestion protocol.
How does a paddle blender prevent cross-contamination? The stainless steel paddles strike the sealed single-use bag externally and never contact the sample directly, so there is no cross-sample contamination and no between-run cleaning of mixing surfaces.
Does the BenchMasher 400 include decontamination? Yes — a built-in 254 nm UV bulb decontaminates the chamber between runs.
Ordering & Configuration
Plug type at order. Confirm 120 V (US) vs 220 V (international) plug type at order — chassis is universal-input but ships with regional plug.
Pair with blender bag inventory. Confirm bag-format selection at order (standard / side-filter / full-filter) per workflow protocol; plan initial bag order matching expected workflow throughput (500-pack typically supports several months of routine use).
Confirm thermal-regulation requirement. If workflow is thermal-regulated (e.g., Trichinella testing), confirm at order that the heated-chamber feature is workflow-required.
Confirm at quote: workflow application (pathogen detection / Trichinella / QuEChERS / forensic / cannabis / environmental), bag-format selection, plug type, training requirements, and lead time.
Warranty: Per Benchmark Industrial standard warranty terms — confirm at quote.
Benchmark Industrial BenchMasher 400 family:
- IPD4400 (this product) — BenchMasher 400 Paddle Blender chassis
- IPD4400-B400 — Standard blender bags, 400 mL × 60 µm, 500/pk
- IPD4400-B400F1 — Side-filter blender bags, 400 mL × 70 µm, 500/pk
- IPD4400-B400F2 — Full-filter blender bags, 400 mL × 70 µm, 500/pk
Pick the BenchMasher 400 chassis as the procurement entry point; pair with workflow-matching bag inventory for sterile-bag paddle-blender workflows.
