PAO ThermoCube

Thermocube PAO for aircraft hydraulic fluid by Solid State Cooling SystemsCompact air-cooled chiller designed specifically for leak-free temperature control of aircraft hydraulic fluid (PAO fluid)

Current customer

  • aerospace applications using PAO
  • avionics bench testing
  • power supply cooling
  • other point-of-use temperature control applications

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Download PDF Manual 


Why choose ThermoCube PAO?

  • Leak free:  built with all stainless steel tank, tubing and fittings
  • Reliable, refrigerant-free thermoelectric technology: With lifetimes exceeding 200,000 hours, the thermoelectric modules at the core of this chiller make for ultra-high intrinsic reliability. 
  • Compact size: less than 13” (32 cm) on a side
  • Precise temperature control: ThermoCube PAO's digital PID control holds to +0.1 °C, even near ambient. 
  • Optimized for modest heat loads: Cooling capacity up to 275 Watts 
  • Energy-efficient: ThermoCube's thermoelectric modules are powered by variable voltage power supply that provides the minimum power required to control temperature at set point, so ThermoCube only draws as much power as needed (typically <200 W AC) 
  • Whisper-quiet: as low as 49 dBA 
  • Virtually vibration-free
  • Worldwide power compatibility: universal input standard 
  • Easy-to-use controller for fixed temperature control or temperature cycling 
  • Air-cooled: Does not require house or facility chilled water. Can operate in any standard room or lab.
  • Three pumps types are available.  The standard pump is capable of delivering up to 45 psi for avionics and other high-pressure applications.


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Operating Range: 0°C to 65°C standard
Ambient Temperature: 10°C to 40°C non-condensing
Stability / Repeatability: ± 0.1°C at constant load (even near ambient)
Cooling Capacity1: 275 Watts @ 20°C (20°C ambient)
Noise (at 1 meter): < 63 dBA
Process Fluid: PAO (Poly-Alpha-Olefin), Options available for Fluorinert / Galden or HFE
Process Fluid Fittings: 1/4" CP metal (CPM) standard (see table below for other options)
Pumps: 1, 2 or 3 lpm at 30 psig magnetically
coupled gear pump
Tank Volume: 900 ml stainless steel tank with level sensor
Wetted Materials: Aluminum, stainless steel and polymers
Fluid Filter: 5 μm external filter with grounding strap
Size (L x W x H): 13" x 11" x 13" (32 x 28 x 32 cm) without filter
Weight: 34 lbs (15.4 kg)
Power Input: Universal: 115-230 VAC, 50/60 Hz, 7-5 amp max
Communications: Keypad or RS232 Interface
Alarms: Temperature, fluid level, system or component
failure (display, RS232 and Dry Contact)
Standards: TUV listed to UL, CAN/CSA and EN 61010-1,
CE 61010-1
Warranty: 2 years
Note 1:  Cooling capacity will vary with configuration


The following components are included in the standard ThermoCube chiller configuration. However, we regularly work with OEM customers to develop specialized or unique configurations.


Cooling Capacity (Typical) Standard Operating Range
275W of cooling capacity at 20°C (in 20°C ambient air)  0 to 65 °C

Pumps (See Pump Curves Above)

Option Pump Type Flow Rate Pump Warranty*
-1G 1 lpm Gear Pump
Smooth flow, virtually vibration free, SS steel head
>1 lpm @ 35 psig 2 years
-2G 2 lpm Gear Pump
Smooth flow, virtually vibration free, SS steel head
>2 lpm @ 35 psig 2 years
-3GXX 3 lpm Adjustable Speed Gear Pump (XX=Flow Rate)
Smooth flow, virtually vibration free, SS steel head
>3 lpm @ 30 psig 2 years
-3GRF 3 lpm Two Speed Gear Pump (RF = Run/Fill)
Smooth flow, virtually vibration free, SS steel head
 >3 lpm @30 psig 2 years 

Fluid Types

Option Description
-PA PAO (Poly-Alpha-Olefin)
-FL Fluorinert
-GA Galden
-SI Silicone
Power Cords
Option Country / Region
-1 United States & Canada
-2 Europe
-3 Japan
-4 United Kingdom
-5 Israel
-6 Australia
-7 Korea
-8 China (3 prong)
-9 NEMA 6-15 208 US Straight
-10 NEMA L6-15 208 US Twist
-11 Brazil
-12 India/South Africa 6A (D)
-13 India/South Africa 15A (M)
Customer specifies power cord for their country. 13 standard cords are available at no extra charge. Universal input, 115-230 VAC ± 10%.


Various fitting options are available to best match your system configuration.
Option Description Mating Fittings
blank 1/4" metal CPC valved fitting (for ≤2 lpm flow)
(chrome plated brass) 
1/4" Valved metal CPC to 1/4" Hose Barb
SSCS P/N: 30-26361-1
Colder P/N: LCD22004
-SW 1/4" swage fitting
1/4" Swage stem to 1/4" Hose Barb 
SSCS P/N: 30-23511-1
Swagelok P/N: SS-4-HC-A-401
-S2 3/8" swage fitting
3/8" Swage stem to 3/8" Hose Barb 
SSCS P/N: 30-22786-1
Swagelok P/N: SS-6-HC-A-601

Other Options

Option Description
-VD Vibration Dampening material added
-AR Auto Restart software
-### Custom Engineered Special (CES)
Sequential number assigned by design 

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