The dielectric polymer sensor provides stable and accurate dew point measurements and is not affected by most gas compositions. A built-in sample pump draws in samples that are of insufficient pressure from the process. The sample flow is shown on a small rotameter with valve. The analyzer then reads the dew point continuously.
Depending on the application, the following models may be relevant:
• 257N4: applications at atmospheric pressure
• 257CAA-B - compressed air applications 5 to 125 psig
• 257CAA-C - compressed air applications 5 up to 3000 psig
Specifications
Method of Detection |
N/A Dielectric polymer sensor that changes capacitance with moisture variation |
Ranges Available |
N/A -40°F to +104°F (-40°C to +40°C) Dew Point |
Resolution |
N/A ±1°F (1°C) Dew Point |
Accuracy & Repeatability |
N/A ±1°F (±1°C) Dew Point |
Drift |
N/A Less than 1% of full scale per month |
Response Time (T-90) |
N/A Less than 60 seconds after initial purge down |
Ambient Temperature Range |
N/A -18 to 49 ºC0 to 120 ºF |
Linearity |
N/A Better than 1°F (1°C) Dew Point |
Size & Weight |
N/A Approx. 51 x 41 x 26 cm @ 10 kg (20" H x 16" W x 10" D @ 20lbs) |
Power |
N/A 115 VAC, 60 Hz 220 VAC, 50 Hz also available |
Output Options |
N/A 4-20mA output, isolated or non-isolated |
Alarms |
N/A High or low dew point alarm with relay contact |
Hazardous Area Rating Options |
N/A General Purpose, Non-Hazardous |
Applications
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N/A For continuous dew point analysis at atmospheric pressure of air, heat treat furnace gases, compressed air lines and other applications with minor amounts of oils or contaminants present. |
Features
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N/A
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Options
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N/A
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Calibration
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N/A
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Unique Applications
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N/A The 257 Series should not be used to measure dew points when corrosive gases are present. All Nova analyzers are built using proven technologies and techniques. If this product does not suit your application, please contact Nova. In many cases, we are able to build an analyzer specific to your needs. |
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