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A15/81 Dissolved Sulfide Monitor
Brand: Analytical Technology Inc/A15-81-Dissolved-Sulfide-Monitor/488519_A15_81_Dissolved_Sulfide_Monitor_2.gif)
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The Easy, Reliable Way to Monitor Dissolved Sulfides
- ATI’s Model A15/81 Dissolved Sulfide Monitor provides an improved method for measuring sulfides in solution. Rather than using an SIE sensor, the A15/81 employs a polarographic hydrogen sulfide (H2S) gas sensor that is isolated from the sample. The result is a system that can operate continuously on many types of water and wastewater streams with minimal maintenance and adjustment.
- The A15/81 Monitor takes a unique approach to the measurement of sulfide in solution. In operation, a small amount of sample is pumped into the system and mixed with acid. In acidic solution, hydrosulfide and sulfide ions (HS- and S-2) are converted to hydrogen sulfide. The mixed sample flows into a special chamber where the hydrogen sulfide is stripped from the sample. A sensor located in the gas stream measures the released H2S concentration and displays the results in terms of equivalent sulfide ion concentration in mg/l.
- Because sulfide measurements are often made in samples of poor quality, fouling of the analytical system has been a major concern. An important feature of the A15/81 system is the fact that the sensor never comes in contact with the sample. Only the gas stream containing the stripped H2S reaches the sensor. The result is a system that will continue to function, regardless of the quality of the sample. The only requirement is that large particulate be strained from the sample. The analytical system will easily pass particulate as large as 100 microns, so only course screening is required.
Specifications
Range
- 0-2.000 or 0-20.00 ppm
Accuracy
- ± 0.03 ppm
Repeatability
- ± 0.01 ppm
Linearity
- 0.1 % of F.S
Zero Drift
- < 0.01 ppm per month
Display
- 16 Character Alphanumeric Backlit LCD
Control Relay
- DPDT Relay, 5A @ 220 Vac Resistive. Programmable deadband and Time Delay.
Control Mode
- On/Off, Pulse Width Modulation, Pulse Frequency Modulation
Purge Control Relays
- Two SPST Relays Provided for Automated Sample Purge Cycle.
Analog Output
- Isolated 4-20 mA, 600 ohm Max. load. Programmable Output Span. Output may be Inverted.
Operating Conditions
- 0-50° C., 0-95 % R.H. Non-Condensing.
Power
- 110/220 Vac ± 10 %, 50/60 Hz
Enclosure
- Panel Mount Standard, NEMA 4X (IP-65) Wall Mount Optional.