Water Quality
Instruments
Digital online sensors and analyzers for continuous water quality monitoring. RS485 Modbus RTU output, IP68 protection, and SCADA-ready integration across 26 product models.
Digital Sensors for Continuous Online Monitoring
TL Environment's water quality instrument range covers the full spectrum of water analysis parameters — from basic pH and dissolved oxygen to advanced multi-parameter full spectrum sensors. All sensors use digital RS485 Modbus RTU output for seamless integration with PLCs, SCADA systems, and data loggers.
Designed for continuous immersion in water treatment plants, industrial processes, environmental monitoring stations, and aquaculture systems. IP68 protection rating and 316L stainless steel construction ensure long-term reliability in demanding environments.
Output
RS485 Modbus RTU
Protection
IP68 Rated
Installation
Submersible / Pipe
OEM
Available
All Water Quality Instruments
26 products across all categories
TL-PH Series
pH / ORP Sensor
Digital pH and ORP sensor with RS485 Modbus RTU output. IP68, 0–14 pH range, ±0.1 pH accuracy.
TL-EC Series
Conductivity / TDS / Salinity Sensor
4-electrode inductive conductivity sensor. Range 0–200 mS/cm, IP68, RS485 Modbus RTU output.
TL-DO Series
Dissolved Oxygen Sensor
Fluorescence optical DO sensor. Maintenance-free, 0–20 mg/L range, IP68, RS485 output.
TL-TUR Series
Turbidity Sensor
90° scattered light turbidity sensor per ISO 7027. Range 0–4000 NTU, IP68, RS485 output.
TL-CL Series
Chlorine Sensor (Free / Total)
Amperometric free and total chlorine sensor. Range 0–20 mg/L, IP68, RS485 output.
TL-SS Series
Suspended Solids / MLSS Sensor
Near-infrared optical SS/MLSS sensor. Range 0–50 g/L, IP68, RS485 output.
TL-SL Series
Sludge Level Sensor
Ultrasonic/optical sludge-water interface sensor. Range 0–10 m, IP68, RS485 + 4-20mA output.
TL-K Series
Potassium Ion Sensor
ISE potassium ion sensor. Range 0–1000 mg/L, IP68, RS485 + 4-20mA output.
TL-F Series
Fluoride Ion Sensor
ISE fluoride sensor. Range 0–50 mg/L, IP68, RS485 + 4-20mA output.
TL-NO Series
Nitrate / Nitrite Sensor
UV absorption nitrate/nitrite sensor. Reagent-free, range 0–100 mg/L NO₃, IP68.
TL-NH Series
Ammonia Nitrogen Sensor
ISE or UV spectroscopy ammonia nitrogen sensor. Range 0–1000 mg/L, IP68, RS485 output.
TL-SB Series
Sludge Blanket / Interface Sensor
Infrared optical sludge-water interface sensor. Range 0–10 m, IP68, RS485 + 4-20mA output.
TL-COD Series
COD Sensor
Reagent-free UV-Vis COD sensor. Range 0–1500 mg/L, simultaneous turbidity compensation, IP68.
TL-BOD-201X
BOD Sensor
Dual-wavelength UV BOD sensor. Reagent-free, range 0–100 mg/L, IP68, RS485 output.
TL-BGA-206A
Blue-Green Algae Sensor
Optical fluorescence cyanobacteria sensor. Range 0–300 Kcells/mL, IP68, RS485 + 4-20mA.
TL-CHLO-206A
Chlorophyll Sensor
Optical fluorescence chlorophyll-a sensor. Range 0–400 μg/L, IP68, RS485 + 4-20mA.
TL-TP-300
Total Phosphorus Analyzer
Online TP analyzer using ammonium molybdate spectrophotometry. Range 0–2 mg/L, RS485 output.
TL-TN-300
Total Nitrogen Analyzer
Online TN analyzer using chromotropic acid spectrophotometry. Range 0–5 mg/L, RS485 output.
TL-COL-206
Colour / Chroma Sensor
Optical colour and turbidity sensor. Range 0–2000 Hazen, IP68, RS485 + 4-20mA output.
TL-OIL-206A
Oil-in-Water Sensor
UV LED fluorescence oil-in-water sensor. Range 0–150 ppm, IP68, RS485 + 4-20mA output.
TL-HARD-406
Water Hardness Sensor
PVC membrane ISE hardness sensor. Range 0–1000 mg/L, IP68, RS485 + 4-20mA output.
TL-KS-SMY1
Liquid Level Sensor
Submersible static pressure level sensor. Range 0–20 m, IP68, RS485 + 4-20mA output.
TL-CU-406
Copper Ion Sensor
PVC membrane ISE copper ion sensor. Range 0–1000 mg/L, IP68, RS485 + 4-20mA output.
TL-O3-201
Ozone Sensor
Amperometric dissolved ozone sensor. Range 0–20 mg/L, IP68, RS485 + 4-20mA output.
TL-FUV-408
Multi-Parameter Water Quality Sensor (Full Spectrum)
Full spectrum absorption sensor measuring 12+ parameters simultaneously. IP68, RS485 output.
TL-EUV-408
Multi-Parameter Water Quality Sensor (Simulated Spectrum)
Simulated full spectrum sensor measuring 12 parameters. Cost-effective, IP68, RS485 output.
Looking for a specific parameter or custom configuration?
OEM and private label options available. Contact us with your requirements.