EMS MATERIALS SCIENCE & METROLOGY CATALOG 2019–20 EDITION EQUIPMENT & ACCESSORIES EMS 4800 Recirculating Heater/Chillers
Recommended for open and closed loop applications, offering simplicity, reliability and quiet operation. The range includes the EMS 4860, 4870, 4880 and 4890.
Features
Precise temperature control Quiet, efficient operation
Temperature control
Many instruments measuring physical properties depend on accurate control of temperature and in some processes optimum temperature is essential. With the EMS 4800 series, over-cooling (which affects efficiency) is prevented and the water temperature can be accurately controlled over the range -10 to +60°C.
A commonly misunderstood feature of refrigerated systems is in applications where the control temperature is other than at or near room temperature. When the instruments are to be operated at controlled temperatures below ambient, the extraction deteriorates significantly and, as a guide, the compounded change is 4% per degree Celsius. In practice, the refrigerant gas pressure has to be adjusted to optimize the performance at any particular temperature. However, the EMS 4800 series incorporate automatic adjustment valves in the systems.
The EMS 4800 series are of the ‘closed loop’ type and therefore efficiencies are dramatically improved compared with open bath models. They are simple to set up and to operate, and essentially maintenance free.
Choosing the correct heater/chiller
In order to optimize performance from a heater/chiller system, the correct specification must be selected for a particular application. To cool or heat any instrument or system it is important to obtain the following information from the manufacturer:
Heat load to be dissipated to water, eg for an electron microscope: diffusion pump heater, lenses, etc Flow rate and size of tubing Minimum pressure
With this information, consult the Specifications below and select the appropriate heater/chiller. The basic heat load calculation formula is as follows:
Flow rate x weight of fluid x specific heat x D T = Heat Extraction. SPECIFICATIONS
Heat Extraction Rates (in Watts) - 20°C
EMS 4860 EMS 4870 EMS 4880 EMS 4890
4.5kW Recirculator 6kW Recirculator
Model
Extraction rate at 20°C Temperature range Refrigeration (HP) Heater rating
Max pump flow 200Gal/hr
Tank capacity
0.7/3bar Height Width Depth
Weight 75W
125W 200W 350W 700W 800W
- 10°C 105W 250W 425W 600W 1kW
1.3kW
EMS 4860 400W
1kW 450L/h
200Gal/hr 1.2L
Max pump pressure psi/bar 12/60psi 0.7/3bar 37cm 32cm 46cm 40kg
Water connections Temperature sensor
R.T. Probe 0°C
180W 500W 700W 1.2kW 2kW
2.6kW
EMS 4870 1.4kW
1/2
1.5/2.0kW 450L/h
275Gal/hr 1.7L
12/60psi 1.5/3bar 45cm 38cm 61cm 62kg
or 1/8 BSP R.T. Probe
+10°C 300W 900W 1.6kW 2kW 3kW
4.5kW
EMS 4880 2.2kW
3/4
2.5kW 900L/h
275Gal/hr 2.3L
60psi
1.5/3bar 50cm 45cm 62cm 70kg
or 1/8 BSP R.T. Probe
+ 20°C 420W 1.2kW 2.2kW 3kW
4.5kW 6kW
EMS 4890 3kW
-20°C to +70°C -20°C to +70°C -20°C to +70°C -20°C to +70°C 1/5
1
2.5kW 900L/h
3.0L 60psi
50cm 45cm 62cm 82kg
16mm hose 16mm hose 16mm hose 16mm hose or 1/8 BSP
or 1/8 BSP R.T. Probe
Proven reliability Low maintenance
Environmentally friendly- avoids running water to waste
Some typical applications Vacuum coating equipment
Critical point dryers (EMS 3000 and EMS 3100)
Electron microscopes Chromatography equipment Electrophoresis baths Environmental chambers Crystal growth apparatus Fermentation equipment Interferometers Photographic baths X-ray equipment Polarimeters, refractometers ...and many others
Optional Attachments
• High pressure pump for EMS 4860 and EMS 4870 (standard in EMS 4880 and EMS 4890)
• Water failure alarm • Over and under temperature cut out
NOTE: Larger capacity heater/chillers (6kW and 12kW) are available on request - please contact us for further information.
• Custom-made heater/chiller units ORDERING INFORMATION
91098 EMS 4860 1/5 HP Recirculating Heater/Chiller 91099 EMS 4870 1/2 HP Recirculating Heater/Chiller 91090 EMS 4880 3/4 HP Recirculating Heater/Chiller 91095 EMS 4890 1 HP Recirculating Heater/Chiller
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