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TB500 Online Turbidimeter

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The TB500 series online turbidimeters are specifically designed for the continuous measurement of turbidity in filtered water, raw water, final wastewater effluent and many industrial applications. Two models of the TB500 online turbidity analysers are available: The TB502 is a great value, providing reliable and economical online turbidity monitoring with a range of 0 to 1,000 NTUs. The TB504 online turbidimeters feature an EPA accepted ultrasonic cleaning system that keeps the optical chamber clean in raw and finished water applications. The TB504 online turbidimeters also feature a versatile range of 0 to 1,000 NTUs with an accuracy that is the same or better than many smaller range instruments.

Online turbidimeters for most on-line turbidity monitoring applications

Online Turbidity Analyser Light Source
We offer the TB500 series online turbidimeters in two different versions to meet the needs of different measuring standards. White light is recommended for use in online turbidimeters reporting results under US EPA (US standard) jurisdiction. The online turbidity analyser's WL (White Light) versions use a new krypton filled white light technology with lamp life expectancy up to 7 years. The online turbidity analyser's IR versions feature a long life infrared light source, which is recommended for use in online turbidimeters reporting results under ISO 7027 (European standard) jurisdiction. Infrared light is also recommended for waste water final effluent and industrial applications where colour is present in the sample stream.

Online Turbidity Analyser Calibration
Online turbidimeter calibration with primary standards is completed using sealed cuvettes, similar to laboratory procedures. This dry method of online turbidimeter calibration is fast, clean and reusable. On-screen menu items guide you through the online turbidity analyser's calibration procedure quickly and easily. The online turbidimeters have reusable primary standards which are contained in sealed glass cuvettes. Simply place the cuvette into the online turbidity analyser's measuring chamber and verify the reading—just like a laboratory turbidity meter.

Online Turbidity Analyser Advanced Design
The TB500 online turbidimeter’s new optical design allows consistent readings with laboratory and portable turbidimeters. The online turbidity analyser's optical chamber has been designed to eliminate air in the sample while simultaneously creating a vortex cleaning action throughout the chamber. The online turbidity analyser's low-volume sample chamber (30-mL) reduces calibration costs and provides quick response times. The online turbidity analyser has a compact, one-piece, NEMA 4X enclosure is suitable for outdoor installation (within temperature limitations) and allows for simple mounting and minimal use of space. The TB500 online turbidimeter’s intuitive user interface features security code settings to prevent unauthorized tampering with the programming. A built-in diagnostic menu on the online turbidimeter assists in troubleshooting.

Online Turbidity Analyser Outputs
The TB500 online turbidimeter includes an isolated 4-20 mA current output that may be used for chart or data recording, remote monitoring, PLCs or SCADA systems. Two user settable alarm relays on the online turbidity analyser may be connected to an autodialer or local alarm to notify you before dangerously high turbidity levels occur. Also included is an RS485 digital output that may be interfaced with a Modbus system to link multiple units or to integrate the TB500 online turbidimeter into your existing network.

• Meets USEPA method 180.1 and ISO 7027
• Range of 0 - 1000 NTU
• Simple, one-piece design
• Ultrasonic auto cleaning system, EPA accepted
• Easy to clean and calibrate
• Convenient reusable primary calibration standards

Each TB500 online turbidimeter is shipped fully calibrated and includes desiccant, inline pressure regulator, universal 100-250 volt power supply and an operator's manual. The TB502 online turbidity analyser models also include a spare measuring cuvette with light shield.

Online Turbidity Analysers Product Description
Range: 0 - 1000 NTU
Measurement Principle: Nephelometry (90 degrees)
Accuracy: 2% of reading or ± 0.02 below 40 NTU, 5% of reading above 40 NTU
Resolution: 0.0001 Selectable
Response Time: Adjustable (5 to 500 seconds) (0 - 1000 NTU)
Input Pressure: 1 – 200 psi (built in regulator set at 15 psi)
Standard Outputs: 4-20 mA Galvanic Isolated or RS-485
RS-485 Protocols: Modbus
Light Source: White Light - 7 year life, Infrared Light (850nm LED) - 10 year life
User Alarms: 2 High/Low Alarms
Alarm Contacts: Form C 250 VAC 2A
Display: Multiline Custom Backlight LCD
Built in Diagnostics: Yes
Storage Temperature: -20°C to 60°C
Operating Temp: 0°C to 50°C
Wetted Surfaces: Nylon, Borosilicate Glass, Silicon, Polypropylene, Stainless Steel
Enclosure: Designed to meet NEMA 4X, IP66
Outdoor Installation: 0°C to 50°C
Certifications: USEPA, ISO 7027, CE Approved, ETL Listed to UL 3111-1 and ETL
Certified to CSA 22.2 No. 1010-1-92
Dimensions: 35 cm x 30 cm x 30 cm
Shipping Weight: 2.5 kg

Ordering Information:
TB502-WL Online Turbidity Analysers Range: 0 to 1,000 NTU, Light: White, Method: USEPA, Autoclean: No
TB502-IR Online Turbidity Analysers Range: 0 to 1,000 NTU, Light: Infrared, Method: ISO 7027, Autoclean: No

TB504-WL Online Turbidity Analysers Range: 0 to 1,000 NTU, Light: White, Method: USEPA, Autoclean: Yes
TB504-IR Online Turbidity Analysers Range: 0 to 1,000 NTU, Light: Infrared, Method: ISO 7027, Autoclean: Yes

TB500-CAL Online Turbidity Analyser Primary Calibration Kit for TB502 & 504
TB500-IFR Online Turbidity Analyser Inline Flow Regulator
The inline flow regulator limits the flow, in high-pressure systems, to safe flow limits of less than 1 litre/minute. Recommended for pressurised lines.
TB500-ALR Online Turbidity Analyser Flow Alarm
This option indicates a “Low Flow” condition by switching both relays to the fail state and setting the 4-20 mA signal to 2 mA. There is also a screen indication of the low flow condition and a modbus register is set.

Replacement Parts
TB502-CUV Online Turbidity Analyser Flow Thru Cuvette for TB502
TB500-UCUV Online Turbidity Analyser Flow Thru Cuvette for 504
TB500-DR Online Turbidity Analyser Desiccant Refill, all models