651C-CO-1234 — Pressure Controller, 10 Torr (MKS Instruments)

Name: 651C-CO-1234 — Pressure Controller, 10 Torr (MKS Instruments)
Brand: MKS Instruments
SKU: 651C-CO-1234
Price: 2144 USD
Availability: InStock

Part No. 651C-CO-1234

Market Price

→ Stable

$728–$4K

Typical secondary market pricing · USD

Low $728Avg $2,144High $3,560

Save 50-70% vs OEM new

Aggregated from secondary market sources · Not a guaranteed offer

Available by Request

Last verified: 2026-05-11

Request Quote · $728 – $4K

Talk to a specialist · parts@caladansemi.com

✓Tested & inspected

✓Documentation included

✓Fast worldwide shipping

✓30-day functional warranty

✓Escrow payment available

Market Data

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How much does a used 651C-CO-1234 — Pressure Controller, 10 Torr (MKS Instruments) cost in 2026?

A used 651C-CO-1234 — Pressure Controller, 10 Torr (MKS Instruments) from MKS Instruments typically sells for $728 – $4k on the secondary market in 2026. That's a savings of 50-70% compared to new OEM pricing. Prices vary based on condition, firmware version, and included accessories. Request a quote for current availability.

Used MKS Instruments Parts & Consumables vs. buying new: is it worth it in 2026?

Used (2026)

✓Save 50-70% vs. new OEM

✓Lead time: 2-4 weeks

✓Condition: B grade

✓30-day functional warranty

New OEM

—Full OEM price (1–2.5× used)

—Lead times: 12–52 weeks

—New condition, full warranty

—Factory support included

Most buyers in 2026 choose used for cost and speed. OEM new is preferred when full factory support or first-article qualification is required.

What's included with a used 651C-CO-1234 — Pressure Controller, 10 Torr (MKS Instruments) from Caladan Semi?

Every unit Caladan sources in 2026 is inspected and documented before sale. Here's what you get:

✓Grade B — good working condition, normal wear
✓Functional test report and inspection photos
✓Available documentation (manuals, service records where available)
✓Estimated lead time: 2-4 weeks after sourcing confirmation
✓Availability: Available to Source — contact for current inventory
✓Export compliance documentation (EAR99 or ECCN classification provided)

How Much Does 651C-CO-1234 Cost in 2026?

Used units range from $728–$1,495, while refurbished models cost $2,150–$3,560. New OEM parts exceed $5,000, offering 25–85% savings with used/refurbished options. Refurbished units include recalibration and 12-month warranties; used parts may require recertification. Caveat: Units over 8 years old (post-2018) often need pressure sensor replacement (avg. $320 labor).

651C-CO-1234 Specifications and Compatible Tools

Pressure range: 0–10 Torr (±1% accuracy)
Power: 12V DC, 50 mA max
Response time: ≤200 ms
Compatibility:
- AMAT Centura 5500 (1998–2005)
- LAM Pegasus II (2001–2009)
- Veeco Nexus 300 (2003–2012)
Exclusion: Not compatible with 651C-CO-1235 variants (conflicting PID firmware). Verify tool’s pressure interface protocol (4–20 mA vs. 0–5V).

What to Check Before Buying a Used 651C-CO-1234 in 2026

Visual inspection: Reject units with cracked housings or corroded terminals (use magnifier lamp).
Voltage test: Measure 12V DC input with multimeter; deviation >10% (10.8V–13.2V) indicates power supply issues.
Calibration drift: Use a certified 0–10 Torr gauge; error >±1.5% requires sensor replacement.
O-ring condition: Check Viton seals for hardening (Durometer test: <60 Shore A = acceptable).
Lifecycle data: Units with >15,000 operational hours (loggable via MKS PID-7000) should undergo full rebuild.