Description
Pfeiffer Vacuum IKR 251 PTR25500 Compact Cold Cathode Gauge DN 25 ISO-KF 15-30V
The Pfeiffer Vacuum IKR 251 is a compact cold cathode vacuum gauge based on the inverted magnetron (Penning-type) measurement principle. It is designed to measure high and ultrahigh vacuum pressures and connects directly to a vacuum chamber or system via a standard DN 25 ISO-KF (KF25) clamp flange. The gauge is powered by an external controller or gauge controller unit over a 6-pin connector and operates from a 15–30V DC supply at 2W.
Specifications & What's Included
- Model: IKR 251
- Part Number: PTR25500
- Gauge Type: Cold cathode — inverted magnetron (Penning-type) principle
- Flange: DN 25 ISO-KF (KF25) clamp flange
- Supply Voltage: 15–30V DC
- Power Consumption: 2W
- Max Operating Temperature: Less than 55°C (applies to inert gas pressure specifications)
- Pressure range spec: referenced to inert gases at temperatures below 55°C
- Connector: 6-pin circular rear connector
- Housing: White polymer top with stainless steel body and flange
- Manufacture Date: October 2011
- CE marked; manufactured in Germany (Pfeiffer Vacuum, Asslar)
- Gauge only — no cables or controller included
Applications
Cold cathode gauges of this type are standard instruments for measuring high and ultrahigh vacuum in research, industrial, and semiconductor processing environments. The IKR 251 is part of Pfeiffer Vacuum's compact gauge line and is typically used with a compatible Pfeiffer gauge controller (such as the TPG series) that supplies the drive voltage and reads back the pressure signal. Common applications include vacuum deposition systems (PVD/CVD), electron beam and ion beam equipment, surface science instruments, mass spectrometers, and general high-vacuum laboratory chambers. The inverted magnetron design makes the gauge inherently resistant to sudden air exposure (venting) — a significant practical advantage in research and production settings where accidental venting occurs. The DN 25 ISO-KF flange is one of the most widely used vacuum flange standards globally, so this gauge fits directly onto a broad range of chambers, cross-pieces, and tee fittings without adapters.
This Pfeiffer Vacuum IKR 251 PTR25500 Compact Cold Cathode Gauge has been inspected and appears to be in good used condition. The white housing is clean with minor shelf wear, the stainless steel body and DN 25 ISO-KF clamp flange are intact with no visible damage, and the rear 6-pin connector is present. The unit was not bench-tested at our facility, but was removed from service and shows no signs of physical damage or abuse. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
Pfeiffer Vacuum |
Model: |
IKR 251 |
MPN: |
PTR25500 |
SKU: |
52163 |
Type: |
Cold Cathode Vacuum Gauge (Inverted Magnetron) |
Gauge Technology: |
Cold Cathode (Inverted Magnetron / Penning-type) |
Flange Type: |
DN 25 ISO-KF (KF25) |
Supply Voltage: |
15–30V DC |
Power Consumption: |
2W |
Gas Type: |
Inert gases (max pressure spec); air/N2 typical calibration |
Connector Type: |
6-pin circular connector (rear) |
Manufacture Date: |
October 2011 |
Country/Region of Manufacture: |
Germany |
Seller Notes: |
Gauge only — no cables or controller included. |
Compatible With: |
Pfeiffer vacuum systems; any DN 25 ISO-KF equipped chamber |
Form Factor: |
Compact cylindrical, inline flange mount |
Condition Notes: |
This Pfeiffer Vacuum IKR 251 PTR25500 cold cathode gauge has been inspected and is in good used condition. Housing is clean, flange and connector intact. Not bench-tested at our facility; pulled from service. Photos available. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |