Star Micronics 37950900 vs Star Micronics 37950950: Specification Comparison
The Star Micronics 37950900 (BSD-40U) and 37950950 (BSH-20B) are both 1D/2D barcode scanners targeting retail POS and warehouse environments — the same general product class and device type. The BSD-40U is a fixed-mount scanner designed for stationary checkout and pick-pack installations, while the BSH-20B is a handheld unit supporting both wired and wireless (Bluetooth) operation. Buyers choosing between them are typically deciding between a dedicated countertop/overhead fixed scanner and a mobile handheld with cordless capability, making these genuine cross-shop candidates within the 2D scanner category.
In This Guide
- How do the two scanners differ in connectivity and deployment flexibility?
- Are there meaningful differences in scan engine capability and supported barcode formats?
- Which scanner is better suited to demanding physical environments?
- Which should you choose: the 37950900 or the 37950950?
- Side-by-Side Specs
- FAQ
How do the two scanners differ in connectivity and deployment flexibility?
The BSD-40U (37950900) supports wired connections only — USB and RS-232 — and is designed exclusively for fixed-mount installations such as pedestals, countertops, or overhead rigs. It uses a fixed 2D projection engine suited to high-throughput stationary scan points where items are presented to the scanner rather than the scanner being moved to the item.
The BSH-20B (37950950) adds Bluetooth to its USB and RS-232 interface set, enabling both wired and wireless operation. It includes a 2,200 mAh internal battery, which is a spec absent from the BSD-40U entirely. This makes the BSH-20B deployable in untethered scenarios — roving warehouse inventory, cordless checkout lanes, or any workflow where the operator needs to move freely. The BSD-40U has no wireless capability and no documented battery.
Are there meaningful differences in scan engine capability and supported barcode formats?
Both scanners share a 1D/2D scan engine and support a broadly overlapping symbology set: QR Code, Data Matrix, PDF417, UPC, EAN, Code 128, and Code 39. The BSD-40U spec additionally lists Aztec as a supported format in its datasheet-derived fields, while the BSH-20B spec does not document Aztec support. If Aztec barcode reading is required — common in transit ticketing and some logistics labels — only the BSD-40U explicitly covers it.
The BSD-40U uses a fixed 2D projection engine (linear + matrix). The BSH-20B is described as a 2D imager operating in single-pass scan mode. Both are classified as 1D/2D capable in their product specs; neither spec provides resolution, scan rate, or depth-of-field figures, so a quantitative engine-performance comparison cannot be made from the available data.
Which scanner is better suited to demanding physical environments?
The BSD-40U carries an IP52 ingress protection rating, meaning it is protected against dust particles that could harm internal components (rated '5') and against water dripping at an angle up to 15 degrees (rated '2'). This is a higher IP rating than the BSH-20B.
The BSH-20B carries an IP42 rating — protection against solid objects greater than 1 mm (rated '4') and against dripping water in a vertical orientation only (rated '2'). Both scanners share an identical 1.2 m drop rating per their specs. The BSD-40U's IP52 rating gives it a modest but real edge in dusty or lightly wet environments such as stockrooms or light industrial spaces. Neither unit is rated for outdoor or wash-down use based on available specs.
Warranty terms diverge noticeably: the BSD-40U carries a 2-year warranty versus 1 year for the BSH-20B — a meaningful difference for total cost of ownership in high-cycle commercial deployments.
Which should you choose: the 37950900 or the 37950950?
Our take: The 37950900 BSD-40U is the stronger choice when the installation is a fixed, high-throughput scan point — a POS lane, conveyor, or overhead pick station — where wired reliability, better dust/splash protection (IP52 vs IP42), Aztec symbology support, and a longer 2-year warranty (vs 1 year) justify a dedicated mount. The 37950950 BSH-20B is the right choice when cordless mobility is required: its Bluetooth interface and 2,200 mAh battery — specs entirely absent from the BSD-40U — enable roving inventory, flexible warehouse use, and untethered checkout. Drop resistance is identical at 1.2 m for both. Buyers running mixed fixed-and-mobile deployments should note the two units are not interchangeable; the BSD-40U cannot be used handheld wirelessly, and the BSH-20B is not designed for fixed overhead mounting.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | Star Micronics 37950900 | Star Micronics 37950950 |
|---|---|---|
| Model | BSD-40U | BSH-20B |
| SKU | 37950900 | 37950950 |
| Form Factor | Fixed-mount scanner | Handheld scanner |
| Scan Engine | Fixed 2D projection (1D/2D) | 2D imager, single-pass (1D/2D) |
| Connectivity | Wired only | Wired and wireless |
| Interface | USB; RS-232 | USB; RS-232; Bluetooth |
| Wireless | — | Bluetooth |
| Battery | — | 2,200 mAh |
| Symbologies | QR, Data Matrix, PDF417, UPC, EAN, Code 128, Code 39, Aztec | QR, Data Matrix, PDF417, UPC, EAN, Code 128, Code 39 |
| IP Rating | IP52 | IP42 |
| Drop Rating | 1.2 m | 1.2 m |
| Color Options | Black or White | White only |
| Weight | — | 1 lb |
| Country of Origin | — | Vietnam |
| Warranty | 2 Year | 1 Year |
| Intended Use | Retail POS, warehouse fixed mount | Retail POS, warehouse, inventory management |
Frequently Asked Questions
Which should you choose: the 37950900 or the 37950950?
The 37950900 BSD-40U is the stronger choice when the installation is a fixed, high-throughput scan point — a POS lane, conveyor, or overhead pick station — where wired reliability, better dust/splash protection (IP52 vs IP42), Aztec symbology support, and a longer 2-year warranty (vs 1 year) justify a dedicated mount. The 37950950 BSH-20B is the right choice when cordless mobility is required: its Bluetooth interface and 2,200 mAh battery — specs entirely absent from the BSD-40U — enable roving inventory, flexible warehouse use, and untethered checkout. Drop resistance is identical at 1.2 m for both. Buyers running mixed fixed-and-mobile deployments should note the two units are not interchangeable; the BSD-40U cannot be used handheld wirelessly, and the BSH-20B is not designed for fixed overhead mounting.
Is the 37950900 or 37950950 better for a fixed retail checkout lane?
The 37950900 BSD-40U is the specified choice for fixed installations — it is explicitly designed for pedestal, countertop, or overhead mounting with wired USB or RS-232. The 37950950 BSH-20B is a handheld unit and is not documented for fixed-mount deployment.
Can the 37950950 BSH-20B be used wirelessly without a cable?
Yes. The BSH-20B spec lists Bluetooth as an interface and includes a 2,200 mAh battery, confirming wireless cordless operation. The 37950900 BSD-40U has no wireless interface and no documented battery, so it cannot operate without a wired connection.
Which scanner has the longer warranty and better durability rating?
The 37950900 BSD-40U has a 2-year warranty and an IP52 ingress protection rating. The 37950950 BSH-20B has a 1-year warranty and an IP42 rating. Both share a 1.2 m drop rating. The BSD-40U has the edge on both warranty term and IP protection per the provided specs.
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