TURBIDITY METER Meets and exceeds USEPA Method 180.1 for measuring turbidity for drinking water compliance. One controller accepts up to two plug and play sensors giving you two complete turbidimeters. Sensitive to fine changes in low level turbidity with a built-in bubble removal system. Built-in data logger stores up to 6 months of data. Versatile digital output-MODBUS. Two year warranty. Accuracy Simplicity Data Collection and Display USEPA Reporting Experience Accuracy Continuously flowing sample flows through the patented* bubble removal system, which vents entrained air from the sample stream and eliminates the most significant interference in low level turbidity measurement. The 1720E Turbidimeter is not affected by variations in flow and pressure. Simplicity A simplified two-module design includes the sensor and the controller interface. The controller accepts two turbidity sensors adding a second 1720E sensor makes a system with two complete turbidimeters. Connections are simple plug & play. Data Collection and Display The 1720E Turbidimeter uses the sc200 Controller to receive data from up to two sensors. A built-in data logger collects turbidity measurement at user selectable intervals (1-15 minutes), along with calibration and verification points, alarm history, and instrument setup changes for 6 months. Communications using Modbus® RS485, MODBUS® RS232, HART, or Profibus DP. USEPA Reporting Meets and exceeds USEPA Method 180.1 for measuring turbidity for drinking water compliance. One controller accepts up to two plug and play sensors giving you two complete turbidimeters. Sensitive to fine changes in low level turbidity with a built-in bubble removal system. Experience The 1720E Turbidimeter reflects 45 years of Hach leadership in turbidity measurement science. Hach has the largest turbidimeter installation base in the world. And, Hach offers a two-year warranty on the 1720E. Specification: Accuracy:±2% of reading or ±0.02 NTU (whichever is greater) from 0 to 40 NTUAccuracy 2:±5% of reading from 40 to 100 NTU (Defined according to ISO 15839.)Alarm:When connected to sc controller: three set-point alarms, each equipped with an SPDT relay with unpowered contacts rated 5A resistive load at 230 VacCertifications:Listed by ETL to UL 61010A-1: Certified by ETL to CSA C22.2 No. 1010.1: CE certified by Hach Company to EN 61010-1Certifications 2:CE certified by Hach Company to EN61326 (industrial levels)Communication:When connected to sc controller: MODBUS RS232/RS485, PROFIBUS, HARTCompliance Certifications:Standard Methods 2130B, USEPA 180.1, Hach Method 8195Dimensions (H x W x D):254 mm x 305 mm x 406 mmMounting:Turbidimeter body and head assembly: wall and floor stand; sc controller: wall, pole, panel, and floor standNumber of Channels:2Operating Humidity:5 to 95 % non-condensingOperating Temperature Range:0 to 40 °C (Double Sensor System) 0 to 50 °C (Single Sensor System) Output:Up to five selectable for 0-20 mA or 4-20 mA; output span programmable over any portion of the 0-100 NTU range; built into the sc ControllerPower Requirements (Hz):50 - 60 HzPower Requirements (Voltage):115 - 230 V ACRange:0.001 to 100 Nephelometric Turbidity Units (NTU)Repeatability:Better than ± 1.0 % of reading or ±0.002 NTU, whichever is greater (Defined according to ISO 15839.)Resolution:0.0001 NTU up to 9.9999 NTU; 0.001 NTU from 10.000 to 99.999 NTU; 0.01 NTU at 100.00 NTUResponse Time:Initial response in 1 minute, 15 seconds for a full-scale step changeSample Flow Rate:200 to 750 mL/minute (3.1 to 11.9 gal/hour)Sample Input:1/4 inch NPT female, 1/4 inch compression fitting (provided)Sample Output:1/2 inch NPT female, 1/2 inch hose barb (provided)Sample Temperature:0 to 70 °C (32 to 122°F)Ship Wt. (lbs):1720E Turbidimeter: 5.9 kg (13 lbs.) 1720E Turbidimeter and sc200 Controller:  6.12 kg (13.5 lbs.) Signal Average Time:User selectable from 0, 6, 30, 60, 90 secondsStorage Conditions:-20 to 60 °C (-4 to 140 °F) Include: Hach sc200 Controller, Mounting Hardware, sc200 Basic User Manual, 1720E, 1720E User Manual, and 1000 mL 20 NTU Stablcal ®. (The controller power cord is ordered separately.)