Relative humidity dewpoint sensor hyrgrometer and panel meter kit.


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Dew Point, Transmitter, Meter, Hygrometer,
Economically priced Alpha Systems dew point hygrometer designed for continuous analysis of air or gas or the regeneration of desiccant dryers.
	Features Rapid Response Display in C, F Dewpoint, ppmv,ppbv & lbs/MMSCF Accuracy to +/- 2 degrees C Dewpoint Built in AUTO CAL procedure NEMA IP66 metric and non metric units Linear analog output 4 - 20 mA Two relay alarms Universal Power supply 24-230VAC Traceable Calibration UL 508
Dew Point The dew point is defined as the lower temperature to which air must be cooled in order for condensation to occur. The dew point is dependent on the concentration of water vapor present, and therefore on the relative humidity. Dewsmart Sensor The model DS1200 is an on-line hygrometer designed to measure moisture in process gases and dry compressed air. The panel mounted display and AMT sensor are both rated for NEMA 4 service. The DS1200 with AMT ultra-high capacitance sensors provide excellent performance and accurate trace moisture measurement. The combination of advanced digital technology of the display electronics and sensor, makes this the system of choice for a wide range of applications where precise indication, control and monitoring is critical. The model DS1200-AMT system can be factory configured to read out in °C dewpoint, °F dewpoint, ppm(v), ppb(v), g/m³ or lbs/ MMSCF. The measured value is displayed on a large 4 digit, fourteen segment LED display. The instrument offers two fully programmable alarm relays, which can be independently set across the full operating range of the sensor. An optically isolated 4-20 ma signal, linear with the measurement units, is also provided. The model DS1200-AMT can be supplied with one of three different sensor ranges. The long lifetime sensor offers excellent low end sensitivity, repeatability and response speed - especially on dry down. Integrated electronics in each sensor allow calibration data to be stored within its memory, making sensors completely field interchangeable. Each sensor is calibrated to provide an accuracy of better than ±2°C dewpoint and is supplied with a certificate traceable to NIST or other standards. The “ AUTOCAL” feature provideds for easy field verification of the system response, without the need for additional equipment. The DS1200-AMT display can be remotely mounted over 1/2 mile (3280 feet) from the sensor, connected by a simple twisted pair cable.

Installation using sensor holder

The drawings show the sensor mounted in a holder which is connected to the gas line to be tested. The sensor may be installed at line pressure ( fig 1.) or at atmospheric pressure ( fig 2.). We recommend installation at atmospheric pressure because the sensor is then protected from condensate in the event of a drier failure.
Sample should be taken from the upper surface of the main line to prevent any risk of condensate reaching the sensor. Additional components may required for specific applications. Use stainless steel , nickel or copper piping wherever possible. The connections to the sample chamber are Swagelock fittings.

Sensor Dimensions

Specification of DS1000 Dewpoint Hygrometer

Model	DS1200
Panel meter/system
Ranges	HD -65°C to +20 °C dewpoint. (-85°F to +68 °F) SD -100°C to +20°C dewpoint. (-148°F to +68 °F) LD -120°C to +20°C dewpoint. (-184°F to +68 °F)
Display	4 digit 14 segment bright red LED 0.5"
Resolution	0.1 degsC, 0.1 degs F dewpoint or 0.1ppm (v)
Alarm relays	2 sets of voltage free changeover alarm contacts rated at 7A@240 VAC, 7A@30VDC Set points adjusted from the front panel
Analog Output	Isolated 4 - 20 mA, max load 800 Ohms
Power Supply	24 - 250 VAC 3.5W, 50/60Hz universal power adaptor
Panel Meter Housing	1/8 Din IP66 front panel. Cutout dimensions 92 x 45 mm
Sensor
Sensor type	Aluminum Oxide Ultra High Capacitance patented Alpha Systems Dewsmart.
Sensor Accuracy	+/- 2 degs C dewpoint
Repeatability	better than +/- 3°C dewpoint
Pressure	From 0.15 PSIA (0.01 barA) to Maximum 5,075 PSIA ( 350 barA)
Sample Flow	Flow independent, ideally 4 to 10 SCFH (2 to 5 LPM). Max: 50 SCFH.
Case material	Stainless steel IP 65 weatherproof
Connector	8 pin
Cable	4 wire shielded up to 100 m length
Sensor Holder
Material	Stainless Steel
Connections	1/4 inch Swagelock tube fittings
Mountings	2 x M5 tapped holes in base or 4 holes 5 mm diameter @ 42 x 35 centers in mounting bracket
System
Warm up time	10 seconds
Operating conditions	-20 to +60 °C (-4°F to 140°F) 10 - 90 % RH non condensing
Storage temperature	-20 to +70°C (-4°F to 158°F)
Electromagnetic	Emission & Immunity: Complies with EN 61326 LVD 73/23/EEC: Complies with EN 61010-1

Ordering Information	Price $US
	From $3050.00
DS1200 with sensor, panel meter, and 6 ft cable, 2 alarm relays - 4-20 mA output -65 Standard sensor -65/+20 C (-85/+68F)	From $3050.00
HD -65°C to +20 °C dewpoint. (-85°F to +68 °F) SD -100°C to +20°C dewpoint. (-148°F to +68 °F) LD -120°C to +20°C dewpoint. (-184°F to +68 °F)
Sample Cell with 1/4" Swagelock fittings

Topac Inc. 231 CJC Highway, Suite 103 Cohasset MA 02025 USA
Tel: 781 740 8778 Fax: 781 740 8779

Dew Point, Transmitter, Meter, Hygrometer,

Features