SeH2 3E 5 LT

MEASUREMENT

Operating Principle: 3-electrode electrochemical
Measurement Range: 0-5 ppm SeH2
Maximum Overload: 10 ppm
Lower Detection Limit: 50 ppb when using recommended electronics
Filter: None
Sensitivity: 1100 ± 500 nA/ppm
Response Time (T90): <30 Seconds
Baseline Offset (clean air):< ±20 nA
Zero Shift (-40°C to +50°C): < ±60 ppb
Repeatability: <2% of signal
Linearity: <10% of full scale

ELECTRICAL

Recommended Load Resistor: 1.5 kΩ
Bias Voltage: 0 V
Resolution: Dependent on Electronics <35 ppb when using recommended circuitry

MECHANICAL

Housing Material: PPO Noryl
Weight: 4.5 g
Orientation: Any

ENVIRONMENTAL

Typical Applications: Portable & fixed life safety
Operating Temperature Range

• Continuous: -20°C to +40°C
• Intermittent: -40°C to +50°C

Operating Pressure Range: Atmospheric ± 10%
Operating Humidity Range: 10% to 95% RH non-condensing

INTRINSIC SAFETY DATA

Maximum at 2000ppm: <0.2 mA at 100 ppm
Maximum o/c Voltage: <500 mV
Maximum s/c Current: <1.0 A

LIFETIME

Long Term Output Drift: <5% per 6 months
Expected Operating Life: 2 years in normal use
Storage Life: 3 months in sealed container
Standard Warranty: 10 months from date of despatch