Sulfides can be found naturally in well water and can build up in wastewater collection systems due to anaerobic conditions that frequently occur. They are also used in mercury removal processes and are frequently found in tanning wastes. In drinking water systems, sulfides cause taste and odor problems. In wastewater systems, they can cause damage to concrete structures in collection systems and contribute to odor problems in treatment facilities. Measurement of dissolved sulfide concentrations has been done primarily by the use of analyzers employing selective ion electrodes (SIE) for sensing....

A15/81 Sulfide Monitors consist of three separate components, a chemistry module where the sample is pH adjusted for measurement, an inlet overflow assembly where raw sample is delivered to the system, and an electronic readout containing the sulfide concentration display, analog output, and alarm contacts. Readout modules are available in either wall mount NEMA 4X or general purpose panel mount versions. A 20 foot interconnecting cable is supplied to connect the monitor to the chemistry module, and separation can be increased to a maximum of 100 feet if required. An optional stainless steel...

Suffix C - Enclosure 1 - Panel Mount 2 - NEMA 4X Wall Mount Suffix D - Power 1 - 120 VAC, 60 Hz. 2 - 220 VAC, 50 Hz. Options: 00-1261 Stainless steel system mounting plate 31-0037 Sensor interconnect cable (max. 100 ft.) Represented By: PDS-A15/81 (2/02) Ordering Information: Model A15/81 - C - D Monitor Electronic Monitor 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...