Repair Kits & Parts
Thunder Maintenance
Part Selections
These are the most popular ordered parts from Thunder.
If you don't see the part you are trying to replace please contact your sales representative at 1-800-872-7728 or email us at sales@thunderscientific.com
Polypropylene Glycol Fluid (PGF)
Polypropylene Glycol (PGF) Antifreeze is used with the Low Temp Option of the 2500 and 2900 systems.
Specify this part number code when ordering. (PGF)
2" Thermistor Temp Probe Assembly
This 2" thermistor temperature probe assembly is used on the Model 2900 and 1220 humidity generators for the RTD2 Pre-Sat temp probe, RTD3 Exp Valve temp probe and RTD4 Chanber Temp probe.
Specify this part number code when ordering. (5606-50-B)
3" Thermistor Probe Assembly
This Thermistor Probe Assembly is used on the Model 2900 and 1220 humidity generators, just specify this probe RTD1 for the SAT Temp probe.
Specify this part number code when ordering. (AM1612-3)
3" Thermistor Probe Assembly
This Thermistor Probe Assembly can be used in any of the three inch temperature probe applications, just specify the probe RTD number that is indicated on the one you want to replace. (RTD0, RTD2 or RTD3) You may need to replace the front and back ferrules. See the nylon ferrules below.
Specify this part number code when ordering. (BTPROBE3)
4" Thermistor Temp Probe Assembly
This 4" thermistor temperature probe assembly is used on the Model 2500 humidity generators for the RTD1 Pre-Sat temp probe and is used as a factory replacement part for that system.
Specify this part number code when ordering. (THRMPB4)
3" Sat Temp Probe Assembly
This 3" thermistor temperature probe assembly is used on the Model 3900 humidity generators for the RTD1 Saturation temp probe and is used as a factory replacement part for that system.
Specify this part number code when ordering. (D09A39041)
3" Test Temp Probe Assembly
This 3" thermistor temperature probe assembly is used on the Model 3900 humidity generators for the RTD2 Test temp probe and is used as a factory replacement part for that system.
Specify this part number code when ordering. (D99A39040)
4” Platinum Resistance Thermometer
This 4" Platinum Resistance Thermometer probe assembly is used on the Model 3920 humidity generators for the RTD2 Test Temp Probe and is used as a factory replacement part for that system.
Specify this part number code when ordering. (D19A3920075)
6” Platinum Resistance Thermometer
This 6" Platinum Resistance Thermometer probe assembly is used on the Model 3920 humidity generators for the RTD1 Saturation Temp Probe and is used as a factory replacement part for that system.
Specify this part number code when ordering. (4551348-6)
Krytox 240AB Grease Applicator
Use this Krytox 240AB Grease Applicator is used as a service item for Parker Valve O-Ring lubrication, Thunder provides the syringe for easy application. The manufacturer of the grease is Dupont USA.
Specify this part number code when ordering. (D11A25090)
Cart Air Hose Assembly
This air hose assembly is used as the connection between the air filter and the air tank assembly on the 2500 mobile cart. (AH1)
Specify this part number code when ordering. (D92A25067_01)
Filter Housing Assembly for Gast Compressors
This air filter assembly is used inside the ACS2520 air compressor system and requires two filters per system and is used for periodic maintenance on your ACS2520 air box. This same filter is used on both of these air systems as well, ACS1220 and the ACS3920, but only one is required.
Specify this part number code when ordering. (FS05025)
Air Filter for Gast Compressors
This air filter is used inside the ACS2520 air compressor system and requires two filters per system and is used for periodic maintenance on your ACS2520 air box. This same filter is used on both of these air systems as well, ACS1220 and the ACS3920, but only one is required.
Specify this part number code when ordering. (C85679)
Gast Compressor Service Kit
This service kit is used on the ACS2520 air compressor system and requires two per system for periodic maintenance on your ACS2520 air box. This same kit can be used on the Models ACS1220 and ACS3920 and only requires one kit.
Specify this part number code when ordering. (GASTKIT)
4oz. Plastic Funnel for Model 1200, 3900 & 3920
3oz. Plastic Funnel for Model 1220
These funnels are used for fluid filling on these four systems. On the models 3900 & 3920 the funnel comes with a fitting attached to help ease the filling process. Please indicate which model of generator you have at the time you order. Specify the part number code in parentheses when ordering.(FUNNEL4) for the 1200 and (FUN39W) for the water funnel on both the 3900 and the 3920 models, then use this part number for the methanol fill funnel (FUN39M). The 3oz. funnel is used on the Model 1220, use this part number (1479T3) when ordering.
Air Tank Pressure Relief Valve
This valve is used as the pressure relief for the air tank on the 2500 mobile cart and can be used as a spare or for a maintenance part.
Specify this part number code when ordering. (G5A710)
Air Dryer Retrofit Replacement Kit
This service kit is used on the Model ACS2520 air compressor system and is used as an air dryer retrofit replacement for your ACS2520 air box. This kit replaces the old style dryer (MD1015). Use this document for the replacement procedure TSD-0326 Model ACS2520 Air Dryer Retrofit Replacement Procedure.
Specify this part number code when ordering. (DryerKit25)
Membrane Air Dryer Replacement
This membrane air dryer is used as a replacement dryer in these air compressor systems ACS2520, and ACS3920. (AD1)
Specify this part number code when ordering. (AIRDRYER100)
Membrane Air Dryer Replacement
This membrane air dryer is used as a replacement dryer in this air compressor system ACS1220. (AD1)
Specify this part number code when ordering. (AIRDRYER50)
Model 1200 Thermistor Probe Assembly
This thermistor probe assembly is used as a replacement for any of the temperature probes in the Model 1200 generator system. Just use one of the labels provided for the one you need.
Specify this part number code when ordering. (MINIPROBEASSY)
1/8" Nylon Ferrule Replacements
These 1/8" nylon ferrules are used as a replacements for any temperature probes in the Models 2500 and 2900 generator systems.
Specify this part number code when ordering. (N203-1/N204-1)
Service Kit for F73C Filters
This service kit is used on any of the F73C type filters, which are used on the Models 2500, 2900, and 1220 system carts as well as each of our old style air compressor systems.
Specify this part number code when ordering. (NG4380-602)
Air Filter Element for F73C Filters
This 5 micron in-line air filter element is used on any of the F73C type filters, which are used on the Models 2500, 2900, and 1220 system carts.
Specify this part number code when ordering. (NG4438-01)
Air Filter Element for Coalescing in the F73C Filters
This air blending filter element is used on any of the F73C type filters, which are used on the Models 2500, 2900, and 1220 system cart.
Specify this part number code when ordering. (NG4444-01)
Cart Filter Replacement Kit
This kit is used for these three Models 1220, 2500, and 2900 mobile carts and is used as replacement parts for the filters.
Specify this part number code when ordering. (NG4444-01/NG4438-01)
Coalescing Filter (LF2)
This filter kit is used as a replacement coalescing filter for the ACS1220 air compressor system.
Specify this part number code when ordering. (EKF500)
Particulate Filter (FRP-95-199)
This filter is used as a replacement particulate filter for these two air compressor systems ACS2520 and ACS3920.
200 psiG Precision Air Pressure Regulator
This 200 psiG precision air pressure regulator is used on all Model 2500 humidity generators and when needed can be used as a replacement part.
Specify this part number code when ordering. (REGNG200)
Drain Box Relief Valve Maintenance Kit
This pressure relief valve seal kit is used on all Model ACS-517B air compressor systems and used as a maintenance kit for the relief valve in that system.
Specify this part number code when ordering. (SS-3K-RL3-EP)
O-Ring Kit for Parker Plug Valve
This service kit is used on the Parker plug valve for either the 2500 Expansion or Flow valve assemblies. Please use Krytox 240AB Grease as the O-Ring lubrication. See above applicator for this maintenance. See *Special Note: at the bottom of this page for plug identification.
Specify this part number code when ordering. (KITPR4EPR)
O-Ring Kit for Swagelok Plug Valve
This service kit is used on the Swagelok plug valve for either the 2500 Expansion or Flow valve assemblies. This kit is used on the old style valves, please contact Tech Support before ordering.
See *Special Note: at the bottom of this page for plug identification.
Specify this part number code when ordering. (VI-P4T-2K)
Air Tank Drain Valve Replacement
This air tank drain valve is used on either the 2500 mobile cart air tank or the air tank regulator option (ATR).
Specify this part number code when ordering. (B2P4T2)
Mass Flow Meter for Model 2500
This mass flow meter assembly is used on all Model 2500's as a factory replacement part for the flow meter.
Specify this part number code when ordering. (FL824ASSY)
Access Panel Torx Screws
These screws are used on all Model 1200, 1220, 2500 & 2900's as panel replacement screws. Screw type is, SS #6-32 x 1/4" Torx Button Head Screws (12 ea Pkg).
Specify this part number code when ordering. (APT6)
1/8" OD Tube Swagelok Knurled Nut Stainless Steel
This Knurled Nut is used on these two Models 2500 & 2900 as a replacement nut.
Specify this part number code when ordering. (S202-1K)
Gas Muffler/Filter
This Gas Muffler/Filter is used on these Models 3900, 3920, and 9500 as a spare or replacement part.
Specify this part number code when ordering. (MU002A)
Solenoid Muffler/Filter
This Solenoid Muffler/Filter is used on the Model 3920 as replacement part.
Specify this part number code when ordering. (MU002A-1032)
Remote Control Start Cable Assembly
This remote start cable is used for these humidity generators, Model 1220, 2500 and 2900 to start the ACS2520 and the ACS1220 Air Compressor Systems. It will automatically start up when the generator starts up. You can use this as a spare or a replacement part.
Specify this part number code when ordering. (D19A00411)
Opto 22 Relay
This relay is used on these Models 2500 and 3900 humidity generators and the ACS2520 Air Compressor System. You can use this as a spare or a replacement part.
Specify this part number code when ordering. (R24D10)
Fuse, Slow Blow
This Slow Blow Fuse is used on these Models 2500 and 3900 humidity generators and is used as a spare or a replacement part.
Specify this part number code when ordering. (WK4062BK)
Model 2500 Fluid Pump
These Fluid Pumps are available for repair and are used on these Model Options of the 2500 humidity generators; Options (R), (S), and (ST). Please provide your "Serial Number" and "Option Version" and "Voltage Spec" so we can get the right pump for your system. These fluid pumps can be used as a spare or a replacement part.
Click the "Get Quote" button to see the pump versions for your system.
Solenoid Valve Assembly
This is the Pressure Select Solenoid Valve Assembly – SOL5 and is used on the Model 2500 humidity generation system. You can use this as a spare or a replacement part.
Specify this part number code when ordering. (D11A25084)
Console/Cabinet Circulation Fan
These two fans are used in several different systems we build and are used for air flow across the components. These are the systems they are used on Models 2500, 3900, ACS1220, ACS2520, and the ACS3920. You can use them as a spare or a replacement part.
Specify these part number codes when ordering. (MR2B3) for 110v and (MR77B3) for 220v.
Model 2900 Fluid Pump
The Fluid Pump is available for repair for your Model 2900 humidity generator. Please provide your "Serial Number" after you Click the Get Quote button. You can use this pump as a spare or a replacement part.
Specify this part number code when ordering. (BC-4A-MD)
Stylus Pen
This Stylus Pen is available as a replacement for your Model 1220, 2900, and 3920 humidity generators. You can use this stylus pen as a spare or a replacement part.
Specify this part number code when ordering. (STYLUSPEN)
Model 1220 Chamber Inlet Tube
This Chamber Inlet Tube is available as a replacement for your Model 1220 humidity generator. You can use this as a spare or a replacement part.
Specify this part number code when ordering. (D1220A298)
Special Note:
*A quick way to identify which O-Ring Kit is needed for your valve maintenance is, look at the end of the valve body to see what color the valve plug is.
- If it's Gray, then you need the Swagelok® O-Ring Kit.
- If it's Black, then you need the Parker® O-Ring Kit.
Click the "Get Quote" button or go to the Parts Quote page for a quote.
Click this link for additional Accessories.
