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Electrochemical Phosphine Gas Sensor (PH3 Sensor) - 4PH-Fast CiTiceL

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• Operating Principle: 3-electrode electrochemical
• Measurement Range: 0-5 ppm PH3
• Maximum Overload: 20 ppm PH3
• Resolution (Electronics dependent): < 0.05 ppm
• Sensitivity: 1.7 ± 0.3 µA/ppm
• Response Time (T90): < 60 seconds
• Repeatability: 2% of signal
• Operating Temperature Range: -20°C to +50°C
• Operating Humidity Range: 15% to 90% RH non-condensing

Model Number: 4PH-Fast CiTiceL
Data Sheet:

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Product Specification

4PH-Fast CiTiceL Phosphine Sensor (PH3 Sensor) Key Features & Benefits:
• Industry leading reliability
• Improved performance variability

4PH-Fast CiTiceL Phosphine Sensor (PH3 Sensor) Technical Specifications

MEASUREMENT
Operating Principle	3-electrode electrochemical
Measurement Range	0-5 ppm PH3
Maximum Overload	20 ppm PH3
Resolution (Electronics dependent)	< 0.05 ppm
Filter	None
Sensitivity*	1.7 ± 0.3 µA/ppm
Response Time (T90)*	< 60 seconds
Baseline Offset (clean air)*	-0.05 to +0.2 ppm equivalent
Zero Shift (+20°C to +40°C)	< 0.07 ppm equivalent
Repeatability	2% of signal
Linearity	Linear

ELECTRICAL
Recommended Load Resistor	10 Ω
Bias Voltage	Not required

MECHANICAL
Housing Material	ABS
Weight	5g (approx.)
Orientation	Any

ENVIRONMENTAL
Operating Temperature Range	-20°C to +50°C
Operating Pressure Range	1 atm ± 10%
Operating Humidity Range	15% to 90% RH non-condensing

LIFETIME
Long Term Output Drift	< 2% signal drift / month
Recommended Storage Temp	0 to 20°C
Expected Operating Life	2 years in air
Storage Life	6 months in sealed container

* Specifications are valid at 20°C, 50% RH and 1013 mBar, using City Technology recommended circuitry. Performance characteristics outline the performance of sensors supplied within the first 3 months. Output signal can drift below the lower limit over time.

Poisoning
CiTiceLs are designed for operation in a wide range of environments and harsh conditions. However, it is important that exposure to high concentrations of solvent vapours is avoided, both during storage, fitting into instruments, and operation.

When using sensors with printed circuit boards (PCBs), degreasing agents should be used before the sensor is fitted. Do not glue directly on or near the CiTiceL as the solvent may cause crazing of the plastic.

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