The Series 8900 Formaldehyde Analyzer provides direct measurement of Formaldehyde in ambient air. This instrument is utilized in industrial plants to monitor workplace exposure limits.
The Series 8900 Formaldehyde Analyzer employs a flame ionization detector (FID) as the sensing element. A dual column configuration with timed backflush to vent is used to strip off moisture and heavier hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed volume of sample is carried to the pre-cut column. Backflush is timed so that only the Formaldehyde and other similar components are eluted to the analytical column. Contaminants on the pre-cut column are backflushed to vent. Formaldehyde is separated from potentially interfering components on the analytical column and elute to the detector for analysis.
The Series 8900 Formaldehyde Analyzer employs a flame ionization detector (FID) as the sensing element. A dual column configuration with timed backflush to vent is used to strip off moisture and heavier hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed volume of sample is carried to the pre-cut column. Backflush is timed so that only the Formaldehyde and other similar components are eluted to the analytical column. Contaminants on the pre-cut column are backflushed to vent. Formaldehyde is separated from potentially interfering components on the analytical column and elute to the detector for analysis.
Unit of Measure
Features
|
N/A
|
Specifications
Analysis Time |
N/A <330 seconds |
Detector |
N/A Flame ionization detector (FID) |
Column |
N/A Capillary |
Oven Temperature |
N/A 45ºC, Nominal |
Carrier Gas |
N/A Hydrogen, 5 cc/min, Nominal |
Lower Detection Limit |
N/A 0.1 ppm Formaldehyde |
Accuracy |
N/A 1% of Full-scale |
Precision |
N/A 2% of Measured Value |
Span Drift (24HR) |
N/A <2% of Full-scale |
Sample Flow Rate |
N/A 250 - 500 cc/min, typical |
Output |
N/A
Digital: RS-232, optional Local Area Network Analog: (1) 0-20ma or 4-20ma loop power supplied, isolated. Selectable for: gas concentration, unintegrated detector signal. Options for up to 20 additional programmable0-20ma, 4-20ma or voltage outputs: 0-1V, 0-5V, or 0-10V. |
Relays |
N/A (5) User programmable relays for concentration and diagnostic alarms (1A @ 30Vdc). Options for up to 32 additional relays available. |
Inputs |
N/A Optional digital input board for 3 contact closure inputs. Supports start analysis, start calibration, and analyze calibration gas sample. |
