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PRESSURE MONITORING system

The LDPMS is a stand-alone pressure monitoring system design to monitor the pressure of a gas source. It can monitor up to 2 gas sources simultaneously and generate an independent low-pressure alarm when the  pressure level of a source is below its setpoint. If the pressure level for both sources is below the setpoint, a second alarm is generated, and a buzzer is activated. The pressure sensors use are heavy duty  series operating from a low-pressure range of 0-50psig(0-6bar) up to 0-8000psig(0-550bar).

THE LDPMS SPECIFICATION

HIGH PRESSURE RANGE MODEL
(DEFAULT)

  • 0-3000 psig (0-350 bar)
    other ranges available on request from scale 0-1000 psig (0-160 bar) to 0-8000 psig (0-550 bar)

LOW PRESSURE RANGE MODEL
(DEFAULT)

  • 0-200 psig (0-25 bar)
    other ranges available on request from scale 0-50 psig (0-6 bar) to 0-500 psig (0-100 bar)
PRESSURE SENSOR MATERIAL
  • Stainless Steel with media-isolated metal diaphragm

PRESSURE SENSOR GAS
CONNECTION (DEFAULT)

  • 1⁄4 NPT
    other gas connection type available on request
PRESSURE SENSOR RATED
  • IP65
ACCURACY
  • +/- 0.25% full scale
OPERATING VOLTAGE
  • 85 ~ 264 VAC
OPERATING CURRENT
  • < 0.1A
OPERATING FREQUENCY
  • 50-60Hz
RELAY OUTPUTS (4X)
  • Dry contact N.O & N.C

  • • Relay 1: Status system working
    • Relay 2: Source 1 low pressure alarm
    • Relay 3: Source 2 low pressure alarm
    • Relay 4: Source 1&2 low pressure alarm with buzzer
COMMUNICATION
  • Serial port RS232 with Modbus RTU (male DB9 connector)
OPERATING TEMPERATURE
  • -20°C to 70°C (-4°F to 158°F)

OPERATING TEMPERATURE FOR
PRESSURE SENSORS
  • -40°C to 125°C (-40°F to 257°F)

THE LDPMS ORDERING INFORMATIONS

-XX
  • HP: High pressure (0-3000psig)
  • LP: Low pressure (0-200psig)
-XXX
  • NP4: NPT 1/4
  • NP8: NPT 1/8
  • NP2: NPT 1/2

LDPMS Application Notes