This redesigned source heater for the Dupont 21-490 mass spectrometer consists of a 25 coil Tungsten/Rhenium heater mounted to a ceramic press with leads attached. Two styles are available, the DFB for the 490 and 491 instruments and the DFD for the 492 instruments.
Dupont Heaters can be repaired. See the Dupont Filament Repair Section.
| UOM=EA | |||||
| Part No. | Description | est wt. |
Quantity In Stock |
Price | Quantity to order |
|---|---|---|---|---|---|
| DFB | Dupont 21-490 and 491 heater | 0.25 | 0(#) | $250.00 | |
| DFD | Dupont 21-492 heater | 0.25 | 0(#) | $250.00 | |
| (#) Standard lead-time for out-of-stock items is approximately two weeks. | |||||
Ordering information.
International (non-US) prices available through your
local dealer.
|
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 Yttria coated filament at start |
 Yttria coated filament after 16,000 cycles |
New Pumps Added to the List of LOW COST S.I.S. Rotary Vane
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Adixen (Alcatel) ACP Series Compact Dry Roughing Pumps - a frictionless pumping module, optimized for operation without internal lubricant.
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- Direct Replacement for the Shimadzu QP5000 Filament.
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SilTite™ FingerTite, the next generation GC capillary ferrule system without the use of any tools.
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Direct Replacement for the Heated Capillary in the Thermo-Fisher Scientific TSQ & LCQ Mass Spectrometers now available
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Imtakt HPLC Columns
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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
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Replacement Filter Elements For Edwards Oil Mist Eliminators -
Save up to 25% off the price of comparable Edwards replacement
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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. 