# Vacuum Chamber Assembly — Likely Sputter Coater / Evaporator Components
**Type:** Vacuum bell jar / chamber bowls | **Qty:** 2 chambers + pneumatic actuator assembly

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## Photos
- `PXL_20260619_141934271.jpg` — Smaller chamber with window/viewport, bellows port, SMC cylinder, electrical connector
- `PXL_20260619_141938034.jpg` — SMC pneumatic cylinder + feedthrough/valve assembly (detail)
- `PXL_20260619_142210437.jpg` — Both chambers side by side (top-down view)
- `PXL_20260619_142216513.jpg` — Larger cylindrical chamber with logo detail

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## Item Description

Two vacuum chamber bowls / bell jars, likely components from a **sputter coater or thermal evaporator** used for SEM/TEM sample preparation (gold/carbon coating). The white enameled/painted stainless steel construction and overall form factor are consistent with **Polaron (Bio-Rad)**, **Edwards**, or similar vacuum coating equipment.

### Chamber 1 (Smaller — with viewport)
- White enameled body, round bowl form
- Center viewport/window (quartz or glass)
- Vacuum bellows port (KF/NW flange compatible)
- Electrical connector (round multi-pin)
- **SMC pneumatic cylinder (CJB16-45)** attached — likely for automated shutter or substrate stage

### Chamber 2 (Larger — cylindrical)
- White enameled cylindrical body, taller profile
- Large-bore opening at top (polished stainless flange)
- Handle/bail wire for lifting
- **Logo:** Stylized key/compass emblem — consistent with **Polaron Equipment Ltd** (UK, now Quorum Technologies)
- Small ball valve/vent port visible

### Also Included
- SMC cylinder (CJB16-45) with pneumatic fittings
- Brass feedthrough rod with ceramic/PTFE insulators
- Small sample stage/platen

### Condition
- Used, functional appearance
- Interior surfaces appear clean
- Sealing surfaces (flanges) appear intact

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## Market Research

| Source | Item | Price |
|--------|------|-------|
| eBay | Bio-Rad Polaron E6100 complete sputter coater | $500–$2,000 |
| eBay | Polaron E7000 vacuum chamber bell jar | $200–$600 |
| eBay | Generic vacuum bell jar / chamber bowl | $100–$400 |
| Machinio | Used sputter coaters complete | $1,000–$5,000 |

Parts/chambers alone without the full coater system trade at $150–$600 depending on how identifiable they are. A matched pair with actuator and accessories adds value.

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## Recommended Listing

**Title:** `Polaron Vacuum Chamber Bowl Set Sputter Coater Bell Jar SEM Sample Prep + SMC Actuator`

**Price:** $250–$450 for the set
- If Polaron brand can be confirmed: push to $400–$600
- List as a set; separating may not increase total value

**Category:** Business & Industrial > Healthcare, Lab & Dental > Medical & Lab Equipment > Lab Vacuum Equipment

**Shipping:** UPS/FedEx ground, ~$45–$75 (fragile — vacuum sealing surfaces must be protected)

**Condition:** Used

**Key selling points:**
- Matched pair of vacuum chambers
- Includes pneumatic actuator (SMC CJB16-45) and brass feedthrough assembly
- Compatible with Polaron and similar sputter coaters
- Clean interior condition

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## Action Items Before Listing
1. **Confirm brand** — look for any Polaron, Bio-Rad, Edwards, or other markings on the base or underside
2. **Identify model number** — critical for searchability (e.g., Polaron E5100, E6100, E7000)
3. Check flange sizes (KF-40, KF-50?) and note in listing
4. Photograph the logos, flanges, and SMC cylinder label clearly
5. The box "33250" visible in background may be a model/part number — check if it belongs to this equipment