A loop powered dew point transmitter for industrial gases

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PLMa

4 to 20 mA loop powered
digital I/O for controlling relays
-110 °C to +20 °C dew point

A dew point meter for dry gases.

This dew point meter uses leading edge nanosensor technology to provide accurate and repeatable results from a compact (170 grams), loop powered, transmitter. With a range of -110 °C to +20 °C dew point (dp) it may be used in compressed air and a wide variety of industrial gases. This dew point meter is designed for harsh environments, and can be installed to monitor and control compressed air dryers, or ensure that high quality air is available for medical air, breathing air and instrument air applications where humidity levels are safety critical.

GENERAL
Measurement	°C and °F dew point, ppm_v, ppm_w, µB H₂O vapour pressure, grams of H₂O/m³ and Lbs H₂O/10⁶ standard cubic feet in natural gas.
Measurement principle	Nanosensor aluminium oxide
Configuration	On-line
Range	-110 to + 20 °C dew point
Temperature range	-40 to + 70 °C
Accuracy	±2 °C temperature corrected
Temperature accuracy	±2 °C
Resolution	< 0.01 °C
Repeatability	0.8 °C
Sample flow	> 1 LPM
Response time	95 % of step change in 3 mins.
Process temp. range	-20 to +60 °C
Ambient temp. range	-40 to +85 °C
Certification
European	CE marked
Calibration	NIST traceable (NPL traceable option)
Shipping
Shipping weight	0.17 Kg
MECHANICAL
Dimension	82.6 L x 41.3 Dia mm (including connector)
Process threads	3/4 "-16 UNF-2A and 1/4 " NPT
Enclosure material	316 stainless steel IP67
Material (wetted parts)	PTFE
Pressure	345 Bar (5000 PSIA)
ELECTRICAL / UTILITIES
Power voltage	5 to 28 VDC two wire loop powered operation
Cable	Two conductor cable min. 24 AWG (for total cable length > 1 mile min. 20 AWG). Must be shielded to meet CE requirements
Outputs
Current	4 to 20 mA (housing isolated) with HART^®
Digital I/O	Standard
All specifications subject to change