The following four hole alumina ceramic tube type insulators are available in six inch lengths. The tubes are constructed of a pure 99% alumina ceramic that has superior gas and vacuum tightness and excellent insulating properties even at elevated temperatures. They are recommended for use in mass spectrometers and other vacuum systems as feed through lines, thermocouple insulators, and in other applications requiring electrical and thermal insulators. Other Styles are also available - one hole, two hole and solid rods.
The following ceramic tubes are supplied in 6 inch lengths. Unless otherwise noted they can also be supplied in longer lengths (up to 24 inches long). We can also custom cut shorter lengths to your specifications. Contact Us with your specific requirements.
Other sizes available on request
Tolerances on all diameters are ±0.005"
| Four Hole Round Ceramic Tube Insulator, UOM=EA | ||||||
| Part No. | OD (in) | ID (in) | est wt. |
Quantity In Stock |
Price | Quantity to order |
|---|---|---|---|---|---|---|
| R1230 | 0.031 | 0.005 | 0.25 | 0(#) | $23.50 | |
| R1231 | 0.047 | 0.010 | 0.25 | 0(#) | $22.00 | |
| R42 | 0.062 | 0.016 | 0.25 | 0(#) | $19.25 | |
| R43 | 0.094 | 0.026 | 0.25 | 0(#) | $19.25 | |
| R1233 | 0.094 | 0.020 | 0.25 | 0(#) | $15.00 | |
| R41 | 0.125 | 0.020 | 0.25 | 0(#) | $13.75 | |
| R1235 | 0.156 | 0.031 | 0.25 | 0(#) | $12.75 | |
| R1236 | 0.187 | 0.031 | 0.25 | 0(#) | $21.75 | |
| R40 | 0.250 | 0.062 | 0.25 | 0(#) | $17.25 | |
| (#) Standard lead-time for out-of-stock items is approximately two weeks. | ||||||
Ordering information.
International (non-US) prices available through your
local dealer.
|
||||||
* Prices given as per 6 inches.
| SIS Catalog Cross Reference | |
|---|---|
| Page # | Part Numbers |
| A73 - Ceramic Tubes | R1230, R1231, R1233, R1235, R1236, R40, R41, R42, R43 |
New Pumps Added to the List of LOW COST S.I.S. Rotary Vane
Vacuum Pumps - Save 35 - 50% off the price of comparable vacuum pumps.
Adixen (Alcatel) ACP Series Compact Dry Roughing Pumps - a frictionless pumping module, optimized for operation without internal lubricant.
Next-Advance Lab Products - affordable molecular biology instruments that automate mundane tasks, freeing scientists for repetitive, time consuming procedures.
- Direct Replacement for the Shimadzu QP5000 Filament.
PCI Analytics Products - product solutions for all Analytical Instrumentation
SilTite™ FingerTite, the next generation GC capillary ferrule system without the use of any tools.
(25% discount until Oct 31)
Direct Replacement for the Heated Capillary in the Thermo-Fisher Scientific TSQ & LCQ Mass Spectrometers now available
- Ideal for use in analytical instrumentation
- Will improve your laboratory workflow and reporting confidence in many ways
DigiVac Bench Top Vacuum Gauges
- Vacuum instrumentation with everything you need to go to work
Imtakt HPLC Columns
-offer a wide variety of unique stationary phases in their HPLC
columns
Programmable syringe pumps for controlled flow. Model NE-300 priced at only $275.00
NEW: Wiley 9th Edition - 660,000-850,000
spectra (a 65% increase). 
NEW: Agilent 5973/75 Replacement Source
Heater and Temperature Sensor 
NEW: SIS™ Direct Replacement
Filament for the Amatek/Dycor RGA Leak Detectors and Quadrupoles
(p/n 95381VE), which tests have shown increase service life. 
NEW: SIS™
Replacement Filter Elements For Edwards Oil Mist Eliminators -
Save up to 25% off the price of comparable Edwards replacement
elements. 
Identify mass spectra via library
search with the fully-evaluated, most widely used mass spectral
reference library, compiled by the National Institute of Standards
and Technology (NIST). 
View and capture images or video at
20x/400x power on a PC computer via attached USB cable. 