Dew Point Sensor 2018-07-06T10:29:35+00:00

Project Description

Dew Point Sensor

Dew Point Sensor
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Applications :

VeriDri is a dew point temperature or PPMv moisture loop-powered transmitter intended for OEM applications such as:

  • Desiccant regenerative air or gas dryers
  • Drying application for plastics prior to injection/blow molding
  • Dryers for medical air
  • Glove boxes

Features :

  • Low-cost
  • Thin-film aluminum oxide moisture sensor technology
  • Microprocessor-based, all-digital technology for reliable operation
  • Compact Size
  • NEMA 4X/IP67
  • Loop-powered 4 to 20 mA output
  • -110° to +40°C dew point temperature/0 to 10,000 PPMv moisture(with constant pressure) overall range capability
  • NIST-traceable calibration

All moisture probe calibrations are traceable to the National Institute of Standards and Technology (NIST).

Installation Flexibility for OEM Applications :

The rugged, compact VeriDri transmitter is designed specifically for OEM installations where space is at a premium. It can be installed directly in the process stream or, if necessary, in a sample system. If required, GE can design and build a sample conditioning system to meet the unique application demands.

The VeriDri transmitter is available with OEM pricing for a minimum quantity of 10 units. Discounts on larger quantities are also available, and blanket orders are accepted.

Specifications :

Moisture Ranges :

  • –110° to 20°C
  • –110° to –50°C
  • –80° to 20°C
  • –80° to –30°C
  • –30° to 20°C
  • –60° to 40°C
  • –150° to 70°F
  • –150° to –40°F
  • –40° to 70°F
  • –100° to 0°F
  • –50° to 50°F
  • 0° to 100°F
  • 0 to 10 PPMv
  • 0 to 100 PPMv
  • 0 to 1,000 PPMv
  • 0 to 10,000 PPMv

Note: PPMv ranges based on constant pressure, provided at time of order placement.

Operating Temperature : –40° to 60°C (–40° to 140°F)

Storage Temperature : 70°C (158°F maximum)

Warm-Up Time : Meets specified accuracy in three minutes

Accuracy :

  • ±2°C from –65° to 40°C dew/frost point
  • ±3°C from –80° to –66°C dew/frost point

Repeatability :

  • ±0.5°C from –65° to 40°C dew/frost point
  • ±1.0°C from –80° to –66°C frost point

Response Time :

Less than five seconds for 63% of a step change in moisture content in either wet-up or dry-down cycle.

Electrical Power :

  • 7 to 28 VDC (loop-powered, customer supplied)\
  • Output: 4 to 20 mA
  • Output Resolution: 0.01 mA
  • Max Loop R = 50x(PSV-7) ohms (Where: PSV = Power Supply Voltage)

Example:

Given a 24 VDC Power Supply, Max Loop R = 50 x (24 – 7) = 850 Ω

Cable:

2 m., standard (consult factory for custom lengths) Mechanical Sample Connection 3/4-in. 16 straight male thread with O-ring Operating Pressure 5 μ Hg to 5,000 psig (345 bar)

Enclosure : NEMA 4X/IP67

Dimensions :

  • Overall: 6.76 × 1.13 in. diameter
  • Electronics with cable: 4.08 × 1.13 in. diameter
  • Weight: 5 oz. (140 grams)

European Compliance Complies with EMC Directive 89/336/ EEC and PED 97/23/EC for DN<25

Moisture Sensor Sensor Type : Thin-film aluminum oxide moisture sensor probe

Calibration

Each sensor is individually computer calibrated against known moisture concentrations, traceable to NIST

Calibration Interval

Sensor recalibration at GE Infrastructure Sensing is recommended every six to 12 months depending on application

Flow Rate

  • Gases: Static to 10,000-cm/s linear velocity at 1 atm
  • Liquids: Static to 10-cm/s linear velocity at density of 1 g/cc