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Advanced Instruments 4250 Single Sample Cryoscope
Fast, accurate measurements of added water in milk
The 4250 Cryoscope from Advanced Instruments supersedes the 4D3 and Fiske Mark 2 models whilst maintaining all of the outstanding qualities of these cryoscopes; robust design, proven reliability and simple, rapid operation.
The 4250 single-sample cryoscope uses the industry standard thermistor freezing point method to precisely determine added water in milk. With its on-board sample identification, broad measurement range and optimal sample size requirement, the 4250 provides accurate results compliant with ISO5764 plateau-seeking mode. The 4250 combines advanced features with simplified operation - a low maintenance, reliable high performance laboratory instrument.
The 4250 can be used in many situations and environments. Results can be displayed as desired and results can be collected on a computer or connected to a LIMS system.
Quality management is improved by the 4250's unique key-switch, which allows the advanced set-up features and calibration modes to be locked out. In Operator Mode, routine testing can be accomplished with just two buttons; in Supervisor Mode, all operations are accessible.
Suppliers and processors can keep milk shipments moving while being assured that no added water has been introduced. Up to 35 samples per hour can be measured. The calibration procedure is quick and computer controlled - it will also detect and warn the operator if the calibration solutions are tested out of order. Settings are stored in a battery-protected memory. The 4250 also incorporates a new thermal printer.
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Proven accuracy
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Repeatability of +/-2m°C.
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Robust design/minimal maintenance
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S/S construction, frost-free cooling chamber and high quality components.
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Proven reliability
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Widely used across Western Europe and America for many years.
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Unique keyswitch
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Locks our certain features such as calibration. In "Supervisor Mode", all operations are accessible.
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Fully compliant to ISO5764
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Fully updated to comply to the latest International Standard.
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Computer controlled calibration
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Calibration is simple and straightforward. If the wrong solution is used during calibration, a warning is displayed and the calibration is not accepted.
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Battery protected memory
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Calibration is not lost even if unit loses power.
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Thermal printer
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Constant printout of results, no ink cartridges needed.
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Model 4250 Single-Sample Cryoscope Specifications
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Sample Volume
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2 or 2.5 mL
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Test Time
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Approximately 90 seconds in the 30-second timed mode
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Sample Capacity
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Single Sample
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Units
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-m°C or -m°H
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Resolution
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1 m°C or m°H
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Range
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0 to 1000 m°C or m°H
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Communications
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On-board printer, DTE RS-232 serial port, and optional barcode scanner
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Performance at Reference Conditions - 20 to 25°C (68 to 77°F); 40 to 60% relative humidity; tolerances of reference or calibration solutions excluded:
Linearity - Less than ±0.5% from a straight line
Repeatability - ±2 m°C or m°H (1 S.D.)
Drift - Less than 1 m°C or m°H per month
Performance Over Operating Conditions:
Temperature Effects - Less than 1 m°C or m°H per 5°C (9°F) ambient temperature change
Operating Conditions:
- Temperature - 18 to 35°C (64 to 95°F)
- Humidity - 5 to 80% relative humidity, (non-condensing)
- Storage Temperature - -40 to +45°C (-40 to +113°F)
- Electrical: Voltage - 100 to 130 VAC (50/60 Hz) or 200 to 250 VAC (50/60 Hz)
- Power Consumption - 150 Watts
- Dimensions - 16.0” H x 13.0” W x 18.0” D (40.6 cm x 33.0 cm x 45.7 cm)
- Net Weight - 28.0 lbs. (12.7 kg)
- Shipping Weight - 39.0 lbs. (17.7 kg)
- Warranty - One year limited warranty on workmanship and all parts except glass, plastic, and parts warranted by their makers
*Reference Conditions - 20 to 25°C (68 to 77°F); 40 to 60% relative humidity; tolerances of reference or calibration solutions excluded.
Accessories:
- QCL Cryoscope Calibration and Check Standards (480mOC, 600mOC and 512mOC), 250ml, 12-month self-life from manufacture date. Certificate of Conformity and traceable to ISO5764.
- Cryoscope tubes, pack of 12, conform to ISO5764 (borosilicate glass, precise dimensions).
- Bath liquid, thermistor probes, air filters and printer paper.
For further information on these products please contact the product manager, Jamie Duncan on 01342 820820 or email enquiries@qclscientific.com.
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