Hach 3654 Portable H2/N2 Analyzer manual Sensor Specifications, Sensor Type 31 270 H

56 of 66Specifications - 3654 Portable H2/N2 Analyzer

7.2 Sensor Specifications

Table 7-2: Sensor Specifications - Table 1

Sensor Type		31 270 H2
Membranes	29561A	2952A	2935A
Thickness	25 µm	25 µm	25 µm
Membrane material	PFA	ETFE	ECTFE
			(Halar)
Recommended	Waste gas offgas,	Reactor	High H2 level
applications	reactor coolant	coolant
Radiation limits	105 rad	108 rad	108 rad
Measurement range at	0-1.5 ppm, or	0-5 ppm, or	0-15 ppm, or
	0-16 cc/kg, or	0-60 cc/kg, or	0-180 cc/kg, or
25°C
	0-1 bar	0-3 bar	0-9 bar
Accuracy (sample temp.	The greater of	The greater of	The greater of
	±1% of reading	±1% of reading	±1% of reading
20-50°C within
	or ± 4 ppb,	or ± 16 ppb,	or ± 45 ppb,
± 5°C of calibration
	or ± 0.06cc/kg,	or ± 0.2cc/kg,	or ± 0.5 cc/kg,
temperature)
	or ± 3 mbar	or ± 12 mbar	or ± 30 mbar
	The greater of	The greater of	The greater of
Accuracy (sample temp.	±2% of reading or	±2% of reading	±2% of reading
0-50°C independent of	± 30 ppb or	or ± 120 ppb	or ± 300 ppb
calibration temperature)	± 0.35 cc/kg or	or ± 1.2 cc/kg,	or ± 3.0 cc/kg,
	± 12 mbar	or ± 40 mbar	or ± 100 mbar
Measurement cycle		20
(sec.)
Sample flow rate	200 ml/min	100 ml/min	50 ml/min
(through flow chamber)

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