Q45H76 turbidity analyzer

Turbidity is a comprehensive indicator of water transparency, defined by the amount of scattered light from particles in a solution. In practical applications, a light beam is directly irradiated into water from the emitting end, and then an optical detector is used to measure the scattered light at a 90 degree angle to the incident beam, or other scattering angles. However, for most turbidity parameters, using a 90 degree measurement angle has become the standard. Turbidity has been used as a relative indicator of suspended solids in a solution and is widely used to measure all drinking water; It is also widely used in industrial water treatment systems as an indicator of water quality.
Qcontums' Q45H76 turbidity analyzer meets the measurement needs of turbidity indicators for urban drinking water and industrial water treatment. And it can reliably measure low range turbidity.
Whether tungsten white light or infrared light is used as the light source for 90 degree scattered light monitoring, Qcontums ® The Q45H76 analyzer can provide highly sensitive turbidity measurement and has zero point stability. By using the same analyzer, turbidity measurements as low as 0.00lNTU or as high as 4000NTU can be achieved without the need for separate high and low ranges using two instruments.

Product Features

• Range selection: Programmable wide range selection, with optional ranges of 0-2000, 0-20.00, 0-200.0, or 0-400.0 NTU.

• Two types of light source sensors to choose from: tungsten white light source (US Environmental Protection Agency standard); Infrared light source (ISO-7027, EN27027 standard).

• Multiple power supply modes: Loop power supply (16-35VD C), transmitter: 4-20mA output.

• AC power supply (115/230VAC) dual relay: dual 4-20mA output.

• Clear display: High brightness backlight display, easy to read numbers from multiple angles; Dual line display, large font LCD display, second line scrolling display of auxiliary information.

• Analog output selection: The standard configuration includes two isolated 4-20mA current outputs, and a third output can be optionally selected if needed; The standard setting provides analog output of turbidity and temperature.

• Relay output: The standard configuration includes three SPDT relays, which can be set to function as alarms, controls, or alarms; At the same time, other three low-voltage relays can be optionally selected.

• Standard PID output function: It has standard PID regulation control function output.

• Digital signal output: optional Profibus DP, Modbus RTU, or Ethernet IP.

• Multiple installation methods: NEMA4X (IP66) shell is suitable for wall mounted, disk mounted, and pipe bracket installation.

Turbidity sensor

The turbidity sensor used in the Q45/76 analyzer is a planar sensor with a light source and an optical detector mounted on a plane. The lens in front of the light source directs the light beam to enter the water sample at a 45 degree angle.

Another lens in front of the optical detector collects scattered light at a 90 degree angle and transmits it to the detector. The signal generated by the detector is amplified inside the sensor and transmitted to the display unit. The periodic pulses of the light source enable the sensor zero point to be automatically adjusted to improve the stability of low range applications.

Turbidity sensors can be used for measurement in a sealed steady flow chamber or directly immersed in an open container. The use of a 1.5 "T-shaped flow cell can be directly used for pipeline installation measurement. Flow tanks are mainly used for measuring very low concentrations of turbidity (0-2NTU), while immersion units are used for measuring high turbidity, such as wastewater or untreated water.