Model DS1200 from Alpha Moisture Systems is a single channel on-line hygrometer designed to measure dewpoint in process gases and dry compressed air. The panel mounted dewpoint meter, providing panel protection to IP65 (NEMA4X), combines with the Model AMT range of ultra high capacitance sensors for accurate trace moisture measurement.
Combination of advanced digital technology of the display electronics and the sensor, makes this the system of choice for a wide range of applications where precise indication, control and monitoring is critical.
Model DS1200-AMT system can be factory configured to read in °C dewpoint, °F dewpoint, ppm(v), ppb(v), g/m³ or lbs/MMSCF. The measured value is displayed on a large 4 digit, 13.8mm high, 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 analogue signal, linear with the measured unit, is also available to interface with any external device.
Model DS1200-AMT can be supplied with any one of a range of sensors, which have all been specially manufactured to provide long term stability, so ensuring a long and trouble free service life.
MODEL DS1200-AMT Dewpoint Hygrometer
DS1200 DISPLAY INDICATOR SPECIFICATIONS
ENCLOSURE: 1/8 DIN panel mounting ABS case
DISPLAY: 4 digit, 14 segment LED indicator. Red characters
13.8mm high. Factory set to display in 0C, 0F, ppm(v), ppb(v), g/m3
SUPPLY VOLTAGE: Universal 22Vac - 253Vac 50/60Hz & 20Vdc -
300Vdc 150mA to 15mA
POWER CONSUMPTION: 3.5W Maximum
OUTPUT SIGNAL: Linear 4 to 20mA, fully isolated. Maximum load
800Ω / 16Vdc
ISOLATION: Voltage Test / Operation - 2.3kVac / 250Vac
ALARM RELAYS: 2 independent fully programmable switched
contacts. Rated 2A @ 250Vac / 1A @ 24Vdc.
ANNUNCIATORS: AL1 & AL2 LED’s on front panel indicating status
of each alarm
ELECTROMAGNETIC COMPATIBILITY (EMC):
Emission & Immunity: Complies with EN 61326
LVD 73/23/EEC: Complies with EN 61010-1
UL, STANDARD OF SAFETY: Certified to UL508
WEATHERPROOF CLASSIFICATION: Front panel only - IP65 (NEMA 4X).
WEIGHT: 230 grams
TRANSMITTER & GENERAL SPECIFICATIONS
SENSOR TYPE: Model AMT Dewpoint Transmitter
SENSING ELEMENT: Ultra High Capacitance - Aluminium Oxide Type
RANGES: See Step 1 below.
AUTOCAL: Field calibration / Span check facility. Activated and
operated via two button switches on the Transmitter body. Locked
in normal operating mode to avoid tamper.
TRANSMITTER ENCLOSURE: 316 Stainless steel body with size C,
DIN EN 175301 connector.
SENSOR PROTECTION: 316 Sintered stainless steel filter - 50 micron
OPERATING PRESSURE: From 1kPa (0.01 barA) to Maximum
35,000kPa ( 350 barA)
SAMPLE FLOW RATE: Flow independent but ideally 2 to 5 standard
litres per minute. Max: 25 litres/min
WEATHERPROOF CLASSIFICATION: IP66 / NEMA4X when Connector
mated to Transmitter.
MECHANICAL CONNECTION: 3/4” UNF (16tpi) with integral Viton
“O” ring seal.
WEIGHT: Transmitter and connector - 175grams
CABLE: Supplied with 2m length standard two core cable.
Nominal diameter 3.4mm, 92ohms/km at 200C
TEMPERATURE COEFFICIENT: Transmitter temperature
compensated for operating range.
REPEATABILITY: Better than ±0.30C dewpoint
FACTORY CALIBRATION: Supplied with Certificate of Calibration
traceable to NPL / NIST
ACCURACY: ± 20C dewpoint (NPL / NIST traceable for range -900C to
OPERATING TEMPERATURE: -200C to +600C
STORAGE TEMPERATURE: -200C to +700C
OPERATING HUMIDITY (External): Maximum - 95% RH
WARM UP TIME: 10 seconds
MECHANICAL WARRANTY: 24 months in case of faulty
workmanship and defective parts.
CALIBRATION WARRANTY: 12 months (not valid if transmitter is
subject to corrosives or mis-use)