Thermal Conductivity Sensor (CO2/N2/H2)

High-precision Thermal Conductivity stainless steel sensor.

Description

The sensor operates based on gas diffusion through a semi-permeable membrane into a micro-volume within the sensor. Inside this micro-volume, the gas interacts with a thermal conductivity detector. Successive measurements are taken, each inducing a conductivity curve. The average slope of these curves determines the gas concentration. To conduct these measurements accurately, periodic purging of the micro-volume gas is necessary. This purge involves injecting a different gas (such as N2 for CO2 measurement) controlled by a valve. After each purge, the gas diffuses again into the sensor through the membrane, enabling a new measurement cycle to begin. This meticulous process ensures precise and reliable gas concentration readings.

Sensor Model	CO2	H2		N2
Sensor serial number	52401	52201	52201	52501
Membrane model number	90956	90956	90952	90956
Measurement range at 25°C	0-15 g/kg 0-10 bar	0-2 ppm 0-1.5 bar	0-10 ppm 0-12 bar	0-350 ppm 0-20 bar
Linear flow rate	50 cm/sec	N/A	N/A	150 cm/sec
Accuracy	1% of the measured value or lowest value whichever is greater
Temperature compensation	0°C to + 50°C / 32°F to 113°F
Temperature range	CIP or SIP resistant up to 120°C / 248°F
Pressure range	0 – 20 bars
Cycle time	20 sec
Recommended purge gas	N2 or air	N2 or air	N2 or air	CO2 or air
Weight	0.6 kg
Enclosure protection	IP65
Material in contact with sample	ANSI 316L, PFA or Tefzel
Sensor cable	3m standard length / optional extension up to 1000 m

This thermal conductivity sensor offers precision, robustness, and easy maintenance. Ideal for high-precision measurements in both dissolved and gaseous phases, it's built in stainless steel to withstand harsh plant conditions and high pressures. With a measurement range from trace to saturation level, its concept and precise mechanical assembly ensure optimal performance, a long life cycle, and low maintenance costs.

Low detection limits:

• Achieves very low detection limits in both dissolved and gaseous applications. • Exhibits low drift over time.

Precise:

• Provides continuous measurement of CO2, H2, or N2 concentrations. • Not influenced by other gases in the environment.

Low maintenance costs:

• Requires only one annual maintenance session. • Withstands high temperatures and cleaning in place (CIP) procedures.

Easy calibration process:

• Simplifies calibration procedures for user convenience.

Fast response time:

• Delivers rapid response within approximately 30 seconds.

Hygienic:

• Features a hygienic membrane cap for clean operation.

Robust:

• Constructed from stainless steel, ideal for harsh chemical conditions and high pressures.