Notifier electrochemical nitric oxide detector with 4-20 mA output

Technical specifications

• Nitrogen monoxide detector Notifier VGS.DU series with electrochemical sensor
• Measuring range 0-20 ppm for NO
• 4-20 mA analog output with 0.1 mA resolution
• 10-bit microprocessor control unit
• System self-diagnostics with constant hardware and sensor verification
• Zero tracking for sensor drift compensation
• Digital filter for transient correction and false alarm reduction
• Hysteresis cycle applied to digital outputs associated with alarm thresholds
• Watchdog for microprocessor control
• Warm-up time of 5 minutes
• Stabilization time less than 1 minute
• Response time less than 60 s T50 and less than 120 s T90 depending on the type of cell used
• Accuracy of ±5% F.S. or 10% of the reading
• Repeatability of ±5% F.S.

Functionalities

• Flashing LED light indication
• If the 3-relay option card is installed, the fault relay is activated when the watchdog is activated.

Alarms

• 3-relay option card with 24 V, 1 A voltage-free changeover contacts for resistive load

Power supply

• 12-24 VDC power supply with tolerance from -20% to +15%.
• Consumption at 12 V DC 140 mA average and 180 mA maximum

Environmental

• Operating temperature -20 °C to +50 °C (-4 °F to 122 °F)
• Storage temperature -20 °C to +50 °C (-4 °F to 122 °F)
• Relative humidity 20% to 90% non-condensing
• 80 to 110 kPa operating pressure
• Air velocity less than 6 m/s
• Degree of protection IP55

Physical characteristics

• Vertical installation with sensor facing downward
• Weight 400 g
• Dimensions 106 x 180 x 62 mm

Contents

• Nitrogen monoxide detector NOTIFIER-823 (VGS.DU-NO)