Specifications include, but are not limited to: 1.1 Section includes: A. Sensor for continuous monitoring of UV absorbance and percent transmittance in water. B. Includes the capability to remotely monitor sensors on any browser-enabled device and present diagnostics on the overall health of the measurements (on Predictive Diagnosticsenabled sensors), as well as upcoming and required maintenance - reducing user risk and downtime. C. Must be compatible with a HACH sc 200/1000 controller. 1.2 Measurement Procedures A. The method of measuring UV absorbance and percent transmittance will be by determining the Spectral Absorption Coefficient (SAC) at a wavelength of 254 nm using a 2-beam ultra-violet absorption technology with a 1, 2, 5, or 50 mm path length. 1.3 Alternates A. Other instruments that do not use 2-beam absorption technology are not acceptable. B. Instruments that require the use of reagents are not acceptable. C. Instruments that are not in accordance with DIN 38404 C3 are not acceptable. 1.4 System Description A. Performance Requirements 1. Measurement range: a. 0.01 to 60 mm-1 at 50 mm, or b. 0.1 to 600 mm-1 at 5 mm, or c. 0 to 1500 mm-1 at 2 mm, or d. 2 to 3000 mm-1 at 1 mm 2. Compensation: 550 nm 3. Measurement interval: 1 minute 1.5 Environmental Requirements A. Operational Criteria 1. Sample flow rate: 0.5 L/hour minimum for bypass sensors 2. Sample pressure at inlet: 0.5 bar (7.25 psi) maximum for tank sensors 3. Sample temperature: 2 to 40 °C (35 to 104 °F) 4. Sample pH: 4.5 to 9 pH
