The Wisemotion compressors have a linear motor that drives the piston directly and are made of parts that do not need lubrification. Capacity is controlled by stroke at a virtually constant frequency. Its extremly quick response time and the oil-free circuit make them suitable for high performance micro channel evaporators that can be used to cool laser diodes. AMS-comp-linear-800-230-R134a or WMD 7H Cooling Capacity 800 W (evap 15°C, cond 54°C, 19 kg/h, 200 W input) Refrigerant R134a Lubrification Oil n/a, oil-free Drive Inverter 230 VAC 50/60 Hz, Frequency Signal 20-200 Hz Evaporating Temperature Range -35 to +15°C Condensing Temperature Range 0-70°C Ambient Temperature Range -5 to 48°C Noise Average 37 dBA (at 65 W Input) Dimensions Envelope 160x310x115 mm WxDxH Mass 5.3 kg Arrovals CE, VDE   AMS-comp-linear-800-230-R600a or WMD C11 Cooling Capacity 800 W (evap 15°C, cond 54°C, 200 W input) Refrigerant R600a Lubrification Oil n/a, oil-free Drive Inverter 230 VAC 50/60 Hz, Frequency Signal 20-200 Hz Evaporating Temperature Range -35 to +15°C Condensing Temperature Range 0-70°C Ambient Temperature Range -5 to 48°C Noise Average 35 dBA (at 65 W Input) Dimensions Envelope 160x310x115 mm WxDxH Mass 5.3 kg Approvals CE, VDE   AMS-comp-linear-220-12-R600a Cooling Capacity 220 W (evap 15°C, cond 54°C, 55 W input) Refrigerant R600a Lubrification Oil n/a, oil-free Drive Inverter 12 VDC, Frequency Signal 20-200 Hz Evaporating Temperature Range -35 to +15°C Condensing Temperature Range 0-70°C Ambient Temperature Range -5 to 48°C Dimensions Envelope 160x310x115 mm WxDxH Mass 5.3 kg Approvals CDC   Applications: Laser Cooling; Reagent Cooling; Refrigeration