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CONG PRIMA-2M (in flow-through submersible configuration)

Gas quality analyzer
CONG PRIMA-2M (flow-through submersible design)

Gas quality analyzer
CONG PRIMA-2M (flow-through submersible design)

The CONG Prima-2M dew point transducer is an automatic condensation hygrometer working on the chilled-mirror principle and designed for measuring the water dew point or hydrocarbon condensation temperature at gas transportation and other natural gas facilities.
CONG Prima-2M in flow-through submersible design is intended to be mounted directly on the pipeline.

Fields of application

  • gas
  • oil
  • chemical
  • power
  • metallurgical industry
  • environment protection
  • metrology

Intended use

for automated water dew point and hydrocarbon condensation temperature measurements at gas metering stations, underground storage and dehydration units, etc.;

Signature
features

Mounted directly on the pipeline
The CONG Prima-2M dew point transducer in flow-through submersible configuration is mounted directly on the pipeline
Can be dismounted without stopping the pipeline work.
The gas shut-off valve is located between the analyzer and the pipeline so the instrument can be dismounted without interrupting the gas flow in the pipeline;
Fine adjustment valve.
The CONG Prima-2M dew point transducer in flow-through submersible configuration has a fine adjustment valve to regulate the gas flow rate through the measuring chamber if necessary.

Characteristics

Dew point measurement range
from -60 to +30°С
Hydrocarbon condensation temperature range
from -60 to +30°С
Error rate limits for dew point and hydrocarbon condensation temperature measurements
±1,0, ±0,5°С
Measurement cycle time
from 5 to 10 min
Maximum pressure of target medium
up to 30 MPa
Gas temperature
from -20 to +50°С
Electric connection
4x0.75 mm cable with outer diameter from 8 to 11.5 mm
Materials in contact with gas under examination
stainless steel, fluoropolymer, glass, silicon
Gas flow rate
0.2...2 l/min
Explosion protection marking
1 Ex d IIB T5 Х; II 2 G Ex d IIА Т5 Gb
IP degree of protection
IP67
Installation
In a climate-controlled location (explosion hazard area)
Output signals (current signal is set with jumpers on the instrument circuit board)
Digital – RS-485, ModBus/RTU protocol or Analog - (4-20) mA output
Voltage, power consumption, max
Using an external power source  (20-27) V, 15 W
Weight, max
6 kg
PSU DR-60-24 weight, max
0.69 kg
Dimensions, max
207х112х235 mm
Ambient temperature range for ensured functionality
from +10 to +40°С
Relative ambient humidity
Up to 98% at +35 °С or below in the absence of condensation and without direct exposure to atmospheric precipitation
Atmospheric pressure:
from 84 to 106.7 kPa (from 630 to 800 mm Hg)
Distance between the instrument and the power source, max
1000 m
Average lifetime
10 years
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Water dew point and hydrocarbon condensation temperature registration principles:

The principle upon which registration of water and hydrocarbon condensation on the chilled mirror’s surface is based involves exploiting the effect of total refraction.

Total refraction is the effect that occurs when light waves that are polarized in the longitudinal plane encounter the interface between dissimilar media in such a manner that the result is the absence of a reflected wave. This effect is only possible when these waves encounter the interface at Brewster’s angle.

In order to achieve this effect, a vertically polarized laser is used as a light source and the mirror is made using a dielectric material.

When the mirror is clean, the laser beam falls on the mirror’s surface at Brewster’s angle and is fully refracted. As a result, a zero signal is obtained at the photodetector output.

Hydrocarbon condensate registration characteristics

When a thin hydrocarbon film with a different refraction index forms on the mirror’s surface, the conditions for total refraction are not met and a new wave reflected from the gas-film media boundary is formed. Moreover, due to the optical transparency of the condensate film, another wave reflected from the film-mirror media boundary is formed as well. As a result, the photodetector captures two reflected beams, which then combine to form an interference pattern.

The hydrocarbon dew point measurement occurs when the thickness of the film is about 5 - 10 nm.

Water condensation registration characteristics

When the mirror cools and water droplets condense onto the mirror’s surface, intense scattering of light occurs. Condensation of water vapor onto the mirror results in an increase in the photoelectric signal of the registration system. The signal level from the photodetector depends on the amount of water condensed on the mirror’s surface.

Configuration*

show package contents
Main set
KRAU2.848.015
The CONG Prima-2M dew point transducer complete with the following accessory equipment:
KRAU8.046.155
Cover
KRAU8.054.001
Cover
KRAU6.464.003
Magnetic key
KRAU8.331.003
Cover key
KRAU8.392.006
Container key
KRAU6.172.001
Protective canopy
KRAU6.832.000
Heat insulating boot
Cotton swabs for mirror cleaning (50 pcs/pac)
Power source DR-60-24
Operational documents
KRAU2.848.015 РЭ
Instruction manuals
KRAU2.848.015 МП
Calibration procedures
KRAU2.848.015 ФО
Layout
Equipment supplied under special orders:
Interface converter RS485/RS232/USB
KRAU4.078.024
"Model-003" flow control unit
* may be altered. Clarified at the time of order
show package contents

Dew point transducer FAS-SW

Aluminium oxide sensor
Mounted directly on the pipeline
The CONG Prima-2M dew point transducer in flow-through submersible configuration is mounted directly on the pipeline
Can be dismounted without stopping the pipeline work.
The gas shut-off valve is located between the analyzer and the pipeline so the instrument can be dismounted without interrupting the gas flow in the pipeline;
Fine adjustment valve.
The CONG Prima-2M dew point transducer in flow-through submersible configuration has a fine adjustment valve to regulate the gas flow rate through the measuring chamber if necessary.