Quality Control at Your Fingertips: Monitor & Measure Dewpoints Easily

The Superdew 3 single channel hygrometer is designed to measure dewpoint in process gases and dry compressed air. The panel mounted enclosure provides panel protection to IP54.

The combination of the highly accurate, repeatable SHAW moisture sensor and advanced digital electronics, make this the instrument of choice for a wide range of applications where precise measurement, control and monitoring is critical. Each dewpoint sensor is calibrated to provide an overall system accuracy of better than ±2 °C (±3.6 °F) dewpoint and supplied with a Certificate of Calibration traceable to National & International Humidity Standards.

Superdew 3 can be user configured to display in °C, °F, ppm(v) or lb/MMSCF on an easy to read five character LED display.

The instrument offers two fully programmable alarm relays, which can be independently set across the full operating range of the dewpoint sensor. Set points can be viewed and adjusted from the front panel keypad.

An isolated 4-20 mA analogue output is supplied as standard. The span of this output can be configured across the range of the dewpoint sensor and the system allows for the Superdew 3 instrument to be sited in excess of 1,000 metres away from the sensor.

The Superdew 3 Dewpoint Hygrometer Package is fully configured according to customer specification and consists of the Superdew 3 single channel analyser, the SHAW moisture sensor, a sensor holder and two metres of sensor cable.

Features

• User selectable digital indication in °C, °F, ppm(v) or lb/MMSCF
• Accuracy ±2 °C (±3.6 °F) dewpoint
• Various ranges: overall range -100 °C to +20 °C (-148 °F to +68 °F) dewpoint
• Universal input: 90 V to 250 V AC (24 V DC option available)
• Automatic calibration (AutoCal)
• Two alarms (view/adjust set points from front panel)
• Linear isolated 4 – 20 mA retransmission signal, adjustable span
• Fully interchangeable SHAW sensors and ranges
• Two years guarantee on meter and dewpoint sensor
• IP65 rated front panel
• Large clear digital display with back light
• User friendly and advanced functionality
• Supplied with Calibration Certificate traceable to National & International Humidity Standards

 

Superdew 3
Sensor	SHAW Ultra High Capacitance Aluminium Oxide Sensor
Ranges	P (Purple): -100 °C to 0 °C dewpoint 0-6,000 ppm(V) S (Silver): -100 °C to -20 °C dewpoint 0-1,000 ppm(V) G (Grey): -80 °C to 0 °C dewpoint 0-6,000 ppm(V) R (Red): -80 °C to -20 °C dewpoint 0-1,000 ppm(V) B (Blue): -80 °C to +20 °C dewpoint 0-23,000 ppm(V)
Approvals	CE and UKCA
AutoCal	Field calibration/span check facility. Activated and operated via potentiometer on the front of the instrument.
Factory Calibrations	Supplied with Certificate of Calibration traceable to the National Physical Laboratory (NPL)
Accuracy	±2 °C (±3.6 °F) dewpoint NPL traceable -90 °C to +20 °C (-130 °F to +68 °F)
Reasolution	0.1 °C, 0.1 °F dewpoint or 0.1 ppm(v)
Repeatability	Better than ±0.3 °C (±0.54 °F) dewpoint
Operating Temperature	-20 °C to +60 °C (-4 °F to +140 °F)
Storage Temperature	-20 °C to +70 °C (-4 °F to +158 °F)
Response Times	Wet to dry: -20 °C to -60 °C – less than 120 secs Dry to wet: -100 °C to -20 °C – less than 20 secs
Sample Flow Rate	Flow independent but ideally 2 – 5 litres per minute Max: 25 litres/min
Calibration Warranty	12 months from date of dispatch
Electrical
Electromagnetic Compatibility (ECM)	Immunity: Complies with EN 61326:2006 Emissions: Complies with EN 61326:2006
Warm Up Time	5 seconds
Fault Conditions	Short circuit/over range: display reads “Short” and output drives to 24.0 mA
Output Signal	Isolated 4 – 20 or 0 – 20 mA Linear
Operating Voltage	90 to 250 V AC 50/60 Hz or 24 V DC
Display	5 character LED
Alarms	Two single pole changeover contacts (NO/C/NC), rated at 10 A at 240 V AC. Alarm trip at set point with 0.1 °C (or equivalent) hysteresis to eliminate relay chatter
Cable	Supplied with two metre low loss coaxial cable
Mechanical
Operating Pressure	From 1kPa (0.01 barA) to maximum 35,000 kPa (350 barA)
Operating Humidity (External)	Maximum – 95% RH non-condensing
Enclosure	DIN Style, 144 mm wide, 72 mm high by 116 mm deep ABS case
Mounting	Panel mount 138.0 x 68.0 mm (DIN 43700)
Sensor Protection	316 sintered stainless steel filter – 50 micron
Probe Material (Wetted Parts)	316 stainless steel
Weatherproof Classifications	Front panel only – IP54