The DE-204SF cold head is a precision machine carefully tuned to achieve temperatures below 4 K with 0.2 W of cooling power at 4.2 K.

The DE-204AFcold head is a rugged workhorse built with power and durability in mind achieving temperatures below 9 K with 2 W of cooling power at 10 K.

The DE-204PF cold head is a hybrid of the the 4 K and 10 K philosophies achieving a balance that exhibits the best of both worlds, with temperatures below 5.5 K and 3 W of cooling power at 10 K.

Our high temperature interfaces use a unique combination of mechanical and thermodynamic properties to create a high temperature thermal disconnect between the cold head and the sample space. This allows for heating of the sample space far in excess of the maximum 355K temperature of our cryocoolers.

450K The easy way

Our 450K interface is a simple semi-perminant addition to the cold tip that expands the upper sample temperature range by 95K utilizing most of the same instrumentation as our standard cryocoolers.

800 K Pouring on the Heat

Our specially design 800K interface goes beyond the standard techniques to provide a unique system that maximizes thermal conduction at low temperatures while minimizing heat transfer at high temperatures. Beyond the safe operating temperature of Silicon Diodes the standard sensors are replaced with E-type Thermocouples and Platinum RTDs.

From our standard offerings of single strand copper and low noise coaxial wiring packages, to any number of custom wiring configurations, our technicians painstakingly wrap each cold head for optimum thermal anchoring.

Typical instrumentation for temperature measurement and control include, one 50 ohm thermofoil heater, one curve matched silicon diode for rough temperature control, and one free length calibrated diode for direct attachment to the sample or sample holder for accurate temperature measurement. Silicon diode sensors are favored heavily for most standard applications, because of their low cost, durability, and stability, but we do offer a wide variety of other sensors for different applications such as Cernox sensors for high magnetic fields, E-type thermocouples for 4 K - 800 K measurements, and Platinum RTD's for accurate high temperature measurements.

Our wide selection of wiring and instrumentation is matched by an equally wide selection of temperature controllers from Cryocon, Lakeshore, and Scientific Instruments.

Whether the measurement is optical or electrical in nature, the sample large or small, we have a sample holder for almost any measurement. The CS204*F-FMX-19N can accept all but our largest sample holders. As will all of our cold fingers the Omniplex Sample Stick has a 1/4-28 threaded hole on the cold tip to mount the sample holder. So even if you do not find what you need from our wide variety of sample holders there is always the option of attaching a custom sample holder.

The water cooled ARS-4HW compressor that powers the DE-204 Series Cold heads has many benefits that are amplified in small laboratory settings. The water cooling redirects heat energy that would otherwise be dumped into the lab, by a large cooling fan. The lack of a large cooling fan also dramatically reduces the noise of these compressors (only 60 dBA). Additionaly with minimum air circulation, the air currents and dust are kept to a minimum. The high efficiency heat exchanger results in low water usage, and saves space inside the compressor giving it a small footprint. When water is not available our Coolpac™ remote recirculation system can send cooling water from up to 100ft away.

The ARS DE-204 Closed Cycle Cryocooler operates on a pneumatically driven Gifford-McMahon refrigeration cycle that is both mechanically simple and robust.

12,000 Maintenance cycle

Over time the internal components of the cold head begin to wear. Eventually the performance of the cold head will decline and sometime after 12,000 hours certain internal components need to be replaced or refurbished. With Most Closed cycle cryocoolers the only option is to send the cold head back to the manufacturer for service.

A Second Option

The Simplicity of the ARS pneumatically driven cryocooler allows for another option. Our customers have the option of purchasing a service kit for our 10K and 5.5K cryocoolers that replaces all of the worn components. This service kit can be ordered ahead of time and reduce down time to a matter of hours instead of weeks.