1720E Low-range turbidity analyzer

Principle of Operation:

Incandescent light emitted from the sensor light source assembly travels downward into the turbidity analyzer and is scattered by suspended particles in the sample. A photodetector immersed in the water sample detects the scattered light at a 90° angle to the incident beam. The continuously flowing water sample passes through a bubble elimination system that removes entrained air bubbles from the sample stream, making the turbidity analyzer immune to variations in sample flow rate and pressure, thereby eliminating the most significant interference in low-range turbidity measurement.

Instrument Features:

• The 1720E low-range turbidity analyzer features a built-in bubble elimination system, making the instrument immune to flow rate and pressure variations, effectively preventing interference with excellent reproducibility.

• The 1720E turbidity analyzer uses a USEPA (U.S. Environmental Protection Agency) approved method, ensuring greater data universality.

• The 1720E turbidity analyzer offers flexible calibration: either the recommended two-point calibration method using 0 and 20 NTU, or single-point calibration by comparison: select any point within the 1-40 NTU range.

• In addition to NTU, the 1720E low-range turbidity meter displays multiple auxiliary measurement units: FTU, TE/F, mg/L.

• The 1720E turbidity analyzer is very simple to clean and maintain; calibration is required once every three months.

• Specifications

• Measuring range:    0.0001～ 9.9999；10.000～ 99.999NTU；auto-ranging

• Accuracy:    0 ～ 40NTU: ±2% of reading or ±0.02, whichever is greater

• 40 ～ 100NTU: ±5% of reading

• Resolution:    0～ 9.9999NTU: 0.0001NTU；

• 10.000～ 99.999NTU: 0.001NTU

• Reproducibility:    Better than ± 1.0% of reading or ± 0.002, whichever is greater

• Response time:    Step response, initial response time approximately 1 minute 15 seconds

• Signal averaging:    User-selectable at approximately 6, 30, 60, 90 seconds; user default is approximately 30 seconds

• Sample flow rate:    200～750mL/min

• Operating temperature:    0 ～50℃ for single-sensor systems, 0 ～40℃ for dual-sensor systems

• Sample temperature:    0 ～ 50℃

• Analog output:    0/4 ～ 20mA selectable. Programmable within 0 ～ 100NTU range

• Relays:    3 SPDT, 230VAC, 5A; configurable setpoint alarms

• Power requirements:    100～230VAC, 50/60Hz, auto-selecting; 40VA

• Inlet piping:    1/4" NPT female, 1/4" compression fitting (provided)

• Drain piping:    1/2" NPT female, 1/2" hose (provided)

• Digital communication:    MODBUS/RS485, MODBUS/RS232, LonWorks protocol, Profibus (optional)

• Standard methods:    Standard Method 2130B, USEPA 180.1, HACH Method 8195

• Enclosure:    NEMA-4X/IP66 controller

• Dimensions:    Turbidity meter: 25.4 × 30.5 ×40.6cm

Spare Parts

Ordering Guide

Complete System Ordering

• 2976800CN    1720E turbidity meter with sc200 controller, probe cable length 2 m, 20NTU STABLCAL standard solution

• 2978100CN    1720E turbidity meter with sc200 controller (single-channel, 220V), probe cable length 2 m, 20NTU STABLCAL standard solution

• 2976900CN    1720E turbidity meter with sc200 controller (dual-channel, 24V), probe length 2 m, 20NTU STABLCAL standard solution

• 2978200CN    1720E turbidity meter with sc200 controller (single-channel, 24V), probe length 2 m, 20NTU STABLCAL standard solution. For other communication output order numbers, please refer to the sc200 ordering instructions

Single Turbidity Probe

60101-01    1720E turbidity meter probe, probe cable length  2 m

Optional Accessories

• 57960-00    25ft. (7.6 m) extension cable

• 46308-00    Power cord (230VAC), with waterproof gland. (Note: Power cord must be ordered separately)

• 52250-00    20NTU, ICE-PIC  calibration module

Source: Public information from the HACH Water Quality website