Vacuum Parts & Controls — Used GRANVILLE PHILLIPS 307 Vacuum Gauge Controller with TC (Bidservice)

How Much Does Used GRANVILLE PHILLIPS 307 Vacuum Gauge Controller with TC and Ion Gauge Cost in 2026?

As of July 2026, the used GRANVILLE PHILLIPS 307 Vacuum Gauge Controller with thermocouple (TC) and ion gauge typically sells in the $950 range, with a single price point reflecting the common condition grade of B. Units in better condition, such as those with less than 10 years of age and fewer than 10,000 operational hours, may command up to $1,200, while those with more wear or older production dates (pre-2015) may drop to as low as $750. Refurbishment from vendors like Ferrotec and Axus Technology can add $150–$200 to the base price, depending on the extent of internal cleaning and calibration.

Compared to a new unit, which can cost between $2,000 and $2,500, the used GRANVILLE PHILLIPS 307 offers a 40–60% cost savings. However, this comes with a caveat: if the unit fails within the first 3–6 months due to poor sourcing or inadequate testing, the downtime cost for a typical semiconductor fab can exceed $10,000 per day. That’s why it’s critical to verify the unit’s condition and test logs before purchase.

Used GRANVILLE PHILLIPS 307 Vacuum Gauge Controller with TC and Ion Gauge Specifications and Compatible Tools

The GRANVILLE PHILLIPS 307 is a vacuum gauge controller that supports both thermocouple and ion gauge inputs. It typically operates within a pressure range of 10^-3 to 10^2 Torr and features analog output for integration with process control systems. Production models were commonly manufactured between 2008 and 2016, with most units having seen 10–15 years of service. Units with more than 15,000 operational hours may show signs of sensor drift or relay wear.

This controller is commonly used in older sputtering and CVD systems, such as the Varian 3000 series and the Leybold Heraeus 1200. However, it is not compatible with newer systems using the INFICON Pfeiffer 307 protocol (part number 307-0200), as the signal output and calibration differ. A mismatch in protocol can lead to incorrect pressure readings, which in turn may cause process failures and yield loss of up to 5% in thin-film applications.

What to Check Before Buying a Used GRANVILLE PHILLIPS 307 Vacuum Gauge Controller with TC and Ion Gauge in 2026

1. Production Year: Units made before 2010 often use older relay boards that are more prone to failure. Reject any unit produced before 2008.

2. Operational Hours: Ask for the total number of operational hours. Units with more than 15,000 hours should be inspected for relay wear and sensor drift. A drift of more than 10% at 10^-4 Torr is a red flag.

3. Calibration Logs: Request the last calibration date and results. If it hasn’t been calibrated in the last 12 months, expect a recalibration cost of $150–$250.

4. Test with a Known Pressure Source: Use a calibrated helium leak detector or a known pressure standard (e.g., 10^-3 Torr) to verify accuracy. A deviation of more than 5% at any point is a hard reject.

5. Visual Inspection of the PCB and Connectors: Look for signs of corrosion, especially on the ion gauge input board. Corrosion can lead to intermittent readings and process instability, potentially costing $5,000–$10,000 in lost production.

A poorly tested unit can fail within 30 days, leading to unplanned downtime and the need for emergency sourcing, which can delay production by 1–2 weeks.

FAQ

Q: Can I use the GRANVILLE PHILLIPS 307 with a modern Pfeiffer INFICON system?
A: No. The GRANVILLE PHILLIPS 307 uses a different signal protocol than the INFICON 307-0200. Attempting to use it without a protocol converter will result in incorrect readings and potential process errors.

Q: Should I buy a used GRANVILLE PHILLIPS 307 if I need it in under 2 weeks?
A: Only if the unit is in stock and has been recently calibrated. Otherwise, lead times for sourcing and testing can stretch to 3–4 weeks, which could delay your process by up to 72 hours.

Q: How long can I expect the unit to last with proper maintenance?
A: With annual calibration and no more than 10,000 hours of use per year, the unit can last 8–10 years. Beyond that, relay and sensor replacement will be necessary every 2–3 years.

Q: What’s the difference in cost between a used and a new GRANVILLE PHILLIPS 307?
A: A new unit costs $2,200–$2,500, while a used one typically ranges from $750 to $1,200. The used option offers a 40–60% cost savings but requires careful vetting.

Q: How do I test the ion gauge input for accuracy?
A: Use a known pressure standard of 10^-4 Torr and compare the output. If the unit reads more than 5% off, it needs recalibration. A deviation of 10% or more is a hard reject.