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SHAW AcuDew

Dewpoint Transmitter

Dewpoint Transmitter

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Description

The SHAW AcuDew high performance dewpoint transmitter. A robust and reliable, 2 wire, 4-20 mA loop powered transmitter.

Utilising the ultra high capacitance SHAW moisture sensing technology, the AcuDew offers superior sensitivity, accuracy, repeatability and speed of response.

This dewpoint transmitter incorporates the SHAW AutoCal feature. AutoCal allows users to check the span of the instrument and correct for any deviation between annual laboratory calibrations. Notably, you can AutoCal dewpoint instruments in situ and without the need for skilled personnel or special equipment.

Various dewpoint ranges are available covering an overall range from -120 °C to +20 °C (-184 °F to +68 °F) dewpoint and output units are configurable in °C dewpoint, °F dewpoint, ppm(V), ppb(v), g/m³ and lb/MMSCF.

Built of stainless-steel, its strong construction includes an industrial M12 connector. SHAW designed the dewpoint transmitter to withstand extreme environmental conditions and harsh environments, manufacturing the AcuDew with a protection rating of IP66 (NEMA 4X). The M12 connector reduces the setup time, saving you time when installing and maintaining wiring systems.

The AcuDew dewpoint transmitter provides a linear, 4 – 20 mA signal over the chosen measurement range and is loop powered by a 7-28 V DC source (24 V option is available). If your requirement includes installation in a remote location, the 4-20 mA signal is ideal for data transmission over long distances (up to 1,000 metres (3,280 feet)) without signal degradation. Additional benefits of a 4-20 mA current loop include: resilience against any background electrical noise and easy fault detection if the loop is broken.

Whether you wish to install the dewpoint transmitter directly in to the process line or combine as part of a sample conditioning system, the AcuDew is easy to operate and requires little or no maintenance.

Additional information

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FEATURES

Features:

  • 2-wire, loop powered, 4-20 mA dewpoint transmitter
  • Various ranges: overall range -120 °C to +20 °C dewpoint (-184 °F to +68 °F)
  • Accuracy ±2 °C dewpoint (±3.6 °F)
  • AutoCal (automatic calibration) feature
  • AcuDew shown with AcuLoop plug in display.
  • AcuLoop sold separately.
  • Open/short circuit detection
  • Output configurable in °C dewpoint, °F dewpoint, ppm(V), ppb(v), g/m3 and lb/MMSCF
  • Weatherproof rating IP66 (NEMA 4X)
  • Fully compatible with the single channel displays:
  • AcuLoop, AcuVu, AcuTrak, SU4 sample system and SWS sample system

SPECIFICATIONS

SPECIFICATIONS
Sensing Element: Shaw Ultra High Capacitance – Aluminium Oxide Sensor
Ranges: Dewpoint = 0.1 °C/0.2 °F resolution

ZD: -100 °C to +20 °C (-148 °F to +68 °F) dewpoint
HD: -65 °C to +20 °C (-85 °F to +68 °F) dewpoint
Go (Gold): 120 to -20 °C (-184 to -4 °F) dewpoint, 0.1 ppb – 1,000 ppm(V)
P (Purple): -100 to 0 °C (-148 to +32 °F) dewpoint, 0 – 6,000 ppm(V)
S (Silver): -100 to -20 °C (-148 to -4 °F) dewpoint, 0 – 1,000 ppm(V)
G (Grey): -80 to 0 °C (-112 to +32 °F) dewpoint, 0 – 6,000 ppm(V)
R (Red): -80 to -20 °C (-112 to -4 °F) dewpoint, 0 – 1,000 ppm(V)
B (Blue): -80 to +20 °C (-112 to +68 °F) dewpoint, 0 – 23,000 ppm(V)
MP: 0.1 to 100.0 ppm(V) , 0.1 ppm resolution
LP: 0.01 to 10.00 ppm(V), 0.01 ppm resolution
GH: 0.01 to 10.00 g/m³, 0.01 g/m³ resolution
LB: 0.1 to 100.0 lb/MMSCF, 0.1 lb/MMSCF resolution
AutoCal: Field calibration/span check facility. Activated and operated via the potentiometer on the transmitter body
Accuracy: ± 2 °C (±3.6 °F) dewpoint NPL traceable -90 °C to +20 °C (-130 °F to +68 °F)
Resolution: 0.005 mA
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 to 5 litres per minute. Max: 25 litres/min