Flow, pH & Conductivity Meters, Transmitters & Controllers
Centro offers a wide range of flow, pH, and conductivity meters, transmitters, and controllers to meet the demands of various industrial and commercial applications. From monitoring flow rates and maintaining chemical balance for fluid quality and consistency, our solutions are engineered for precision, reliability, and seamless integration. We provide products such as magnetic and ultrasonic flow meters, pH controllers, and conductivity transmitters designed to optimize performance in industries like water treatment, food and beverage, chemical processing, and pharmaceuticals.
Whether you need accurate measurements, durable equipment, or easy system integration, Centro has the expertise and products to support your operations. Explore our selection online or contact our team to find the right solution for your application and ensure peak system efficiency.
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The GF Signet 2823 Conductivity/Resistivity Electrode provides high-accuracy contacting conductivity measurement for demanding process applications. Available with various cell constants and materials, it interfaces with Signet 2850 sensor electronics for full transmitter system integration. This specific variant (3-2823-3K1-100) is configured with 100 mm insertion.
$2,626.35$2,959.00
Available for Purchase
Subject to factory lead times
The GF Signet 3-2824-2K-025 is a Sensor/Instrument for industrial process measurement and control. This product is designed for use in water treatment, chemical processing, and related industrial applications requiring reliable process measurement measurement. It is compatible with the GF Signet product ecosystem and meets industrial standards for performance and durability. Configured with 2-electrode, PVDF body, 25 mm insertion/cable.
$1,072.20$1,208.00
Available for Purchase
Subject to factory lead times
The GF Signet 3-2824-2K-050 is a Sensor/Instrument for industrial process measurement and control. This product is designed for use in water treatment, chemical processing, and related industrial applications requiring reliable process measurement measurement. It is compatible with the GF Signet product ecosystem and meets industrial standards for performance and durability. Configured with 2-electrode, PVDF body, 50 mm insertion/cable.
$1,149.42$1,295.00
Available for Purchase
Subject to factory lead times
The GF Signet 3-2824-2K1-025 is a Sensor/Instrument for industrial process measurement and control. This product is designed for use in water treatment, chemical processing, and related industrial applications requiring reliable process measurement measurement. It is compatible with the GF Signet product ecosystem and meets industrial standards for performance and durability. Configured with 25 mm insertion/cable.
$1,072.20$1,208.00
Available for Purchase
Subject to factory lead times
The GF Signet 3-2824-2K1-050 is a Sensor/Instrument for industrial process measurement and control. This product is designed for use in water treatment, chemical processing, and related industrial applications requiring reliable process measurement measurement. It is compatible with the GF Signet product ecosystem and meets industrial standards for performance and durability. Configured with 50 mm insertion/cable.
$1,149.42$1,295.00
Available for Purchase
Subject to factory lead times
The GF Signet 3-2831 is a Sensor/Instrument for industrial process measurement and control. This product is designed for use in water treatment, chemical processing, and related industrial applications requiring reliable process measurement measurement. It is compatible with the GF Signet product ecosystem and meets industrial standards for performance and durability.
$320.42$361.00
Available for Purchase
Subject to factory lead times
The GF Signet 2839 Dissolved Oxygen Sensor uses polarographic (galvanic) technology to measure dissolved oxygen in water and aqueous solutions from 0 to 20 mg/L (ppm). It includes a built-in temperature sensor for automatic salinity and pressure compensation, and outputs via S3L digital signal to Signet 9900/9950 transmitters. Ideal for wastewater aeration control, aquaculture, and environmental monitoring.
$468.65$528.00
Available for Purchase
Subject to factory lead times
The GF Signet 2839 Dissolved Oxygen Sensor uses polarographic (galvanic) technology to measure dissolved oxygen in water and aqueous solutions from 0 to 20 mg/L (ppm). It includes a built-in temperature sensor for automatic salinity and pressure compensation, and outputs via S3L digital signal to Signet 9900/9950 transmitters. Ideal for wastewater aeration control, aquaculture, and environmental monitoring. This specific variant (3-2839-1V-025) is configured with 25 mm insertion/cable.
$563.62$635.00
Available for Purchase
Subject to factory lead times
The GF Signet 2839 Dissolved Oxygen Sensor uses polarographic (galvanic) technology to measure dissolved oxygen in water and aqueous solutions from 0 to 20 mg/L (ppm). It includes a built-in temperature sensor for automatic salinity and pressure compensation, and outputs via S3L digital signal to Signet 9900/9950 transmitters. Ideal for wastewater aeration control, aquaculture, and environmental monitoring. This specific variant (3-2839-1V-050) is configured with 50 mm insertion/cable.
$652.38$735.00
Available for Purchase
Subject to factory lead times
The GF Signet 2839 Dissolved Oxygen Sensor uses polarographic (galvanic) technology to measure dissolved oxygen in water and aqueous solutions from 0 to 20 mg/L (ppm). It includes a built-in temperature sensor for automatic salinity and pressure compensation, and outputs via S3L digital signal to Signet 9900/9950 transmitters. Ideal for wastewater aeration control, aquaculture, and environmental monitoring. This specific variant (3-2839-1V-075) is configured with 75 mm insertion.
$736.70$830.00
Available for Purchase
Subject to factory lead times
The GF Signet 2839 Dissolved Oxygen Sensor uses polarographic (galvanic) technology to measure dissolved oxygen in water and aqueous solutions from 0 to 20 mg/L (ppm). It includes a built-in temperature sensor for automatic salinity and pressure compensation, and outputs via S3L digital signal to Signet 9900/9950 transmitters. Ideal for wastewater aeration control, aquaculture, and environmental monitoring. This specific variant (3-2839-1V-100) is configured with 100 mm insertion.
$822.79$927.00
Available for Purchase
Subject to factory lead times
The GF Signet 2839 Dissolved Oxygen Sensor uses polarographic (galvanic) technology to measure dissolved oxygen in water and aqueous solutions from 0 to 20 mg/L (ppm). It includes a built-in temperature sensor for automatic salinity and pressure compensation, and outputs via S3L digital signal to Signet 9900/9950 transmitters. Ideal for wastewater aeration control, aquaculture, and environmental monitoring.
$468.65$528.00
Available for Purchase
Subject to factory lead times
The GF Signet 2840 Dissolved Oxygen Sensor is an optical (luminescent) dissolved oxygen sensor that requires no membrane changes or electrolyte replacement. It measures 0 to 20 mg/L with high stability and minimal drift, ideal for long-term monitoring in wastewater treatment, industrial process water, and aquaculture. Outputs S3L digital signal to Signet 9900/9950 transmitters.
$468.65$528.00
Available for Purchase
Subject to factory lead times
The GF Signet 2840 Dissolved Oxygen Sensor is an optical (luminescent) dissolved oxygen sensor that requires no membrane changes or electrolyte replacement. It measures 0 to 20 mg/L with high stability and minimal drift, ideal for long-term monitoring in wastewater treatment, industrial process water, and aquaculture. Outputs S3L digital signal to Signet 9900/9950 transmitters.
$468.65$528.00
Available for Purchase
Subject to factory lead times
The GF Signet 2841 Dissolved Oxygen Sensor uses optical luminescence technology for reliable, low-maintenance dissolved oxygen measurement. Designed for submersion in open tanks and process vessels, it covers a range of 0 to 20 mg/L and communicates digitally with Signet transmitters via S3L protocol.
$598.23$674.00
Available for Purchase
Subject to factory lead times
The GF Signet 2841 Dissolved Oxygen Sensor uses optical luminescence technology for reliable, low-maintenance dissolved oxygen measurement. Designed for submersion in open tanks and process vessels, it covers a range of 0 to 20 mg/L and communicates digitally with Signet transmitters via S3L protocol.
$598.23$674.00
Available for Purchase
Subject to factory lead times
The GF Signet 2842 Dissolved Oxygen Sensor is designed for applications requiring submersible or flow-through installation. Using optical technology, it offers fast response, no drift, and extended calibration intervals for 0 to 20 mg/L measurement. Compatible with Signet 9900 and 9950 transmitters via S3L digital communication.
$663.03$747.00
Available for Purchase
Subject to factory lead times
The GF Signet 2842 Dissolved Oxygen Sensor is designed for applications requiring submersible or flow-through installation. Using optical technology, it offers fast response, no drift, and extended calibration intervals for 0 to 20 mg/L measurement. Compatible with Signet 9900 and 9950 transmitters via S3L digital communication.
$663.03$747.00
Available for Purchase
Subject to factory lead times
The GF Signet 2842 Dissolved Oxygen Sensor is designed for applications requiring submersible or flow-through installation. Using optical technology, it offers fast response, no drift, and extended calibration intervals for 0 to 20 mg/L measurement. Compatible with Signet 9900 and 9950 transmitters via S3L digital communication.
$134.03$151.00
Available for Purchase
Subject to factory lead times
The GF Signet 3-2845 is a Sensor/Instrument for industrial process measurement and control. This product is designed for use in water treatment, chemical processing, and related industrial applications requiring reliable process measurement measurement. It is compatible with the GF Signet product ecosystem and meets industrial standards for performance and durability.
$1,431.67$1,613.00
Available for Purchase
Subject to factory lead times
The GF Signet 2850 Conductivity/Resistivity Sensor Electronics module interfaces with Signet 2818-2824 contacting conductivity electrodes and outputs a digital S3L signal to Signet 9900 or 9950 transmitters. It provides automatic temperature compensation, on-board diagnostics, and calibration storage. Available with integrated display options for stand-alone use.
$544.98$614.00
Available for Purchase
Subject to factory lead times
The GF Signet 2850 Conductivity/Resistivity Sensor Electronics module interfaces with Signet 2818-2824 contacting conductivity electrodes and outputs a digital S3L signal to Signet 9900 or 9950 transmitters. It provides automatic temperature compensation, on-board diagnostics, and calibration storage. Available with integrated display options for stand-alone use.
$994.98$1,121.00
Available for Purchase
Subject to factory lead times
The GF Signet 2850 Conductivity/Resistivity Sensor Electronics module interfaces with Signet 2818-2824 contacting conductivity electrodes and outputs a digital S3L signal to Signet 9900 or 9950 transmitters. It provides automatic temperature compensation, on-board diagnostics, and calibration storage. Available with integrated display options for stand-alone use.
$994.98$1,121.00
Available for Purchase
Subject to factory lead times
The GF Signet 2850 Conductivity/Resistivity Sensor Electronics module interfaces with Signet 2818-2824 contacting conductivity electrodes and outputs a digital S3L signal to Signet 9900 or 9950 transmitters. It provides automatic temperature compensation, on-board diagnostics, and calibration storage. Available with integrated display options for stand-alone use.
$994.98$1,121.00
Available for Purchase
Subject to factory lead times
The GF Signet 2823 Conductivity/Resistivity Electrode provides high-accuracy contacting conductivity measurement for demanding process applications. Available with various cell constants and materials, it interfaces with Signet 2850 sensor electronics for full transmitter system integration. This specific variant (3-2823-3K1-100) is configured with 100 mm insertion.
$2,626.35$2,959.00
Available for Purchase
Subject to factory lead times
The GF Signet 3-2824-2K-025 is a Sensor/Instrument for industrial process measurement and control. This product is designed for use in water treatment, chemical processing, and related industrial applications requiring reliable process measurement measurement. It is compatible with the GF Signet product ecosystem and meets industrial standards for performance and durability. Configured with 2-electrode, PVDF body, 25 mm insertion/cable.
$1,072.20$1,208.00
Available for Purchase
Subject to factory lead times
The GF Signet 3-2824-2K-050 is a Sensor/Instrument for industrial process measurement and control. This product is designed for use in water treatment, chemical processing, and related industrial applications requiring reliable process measurement measurement. It is compatible with the GF Signet product ecosystem and meets industrial standards for performance and durability. Configured with 2-electrode, PVDF body, 50 mm insertion/cable.
$1,149.42$1,295.00
Available for Purchase
Subject to factory lead times
The GF Signet 3-2824-2K1-025 is a Sensor/Instrument for industrial process measurement and control. This product is designed for use in water treatment, chemical processing, and related industrial applications requiring reliable process measurement measurement. It is compatible with the GF Signet product ecosystem and meets industrial standards for performance and durability. Configured with 25 mm insertion/cable.
$1,072.20$1,208.00
Available for Purchase
Subject to factory lead times
The GF Signet 3-2824-2K1-050 is a Sensor/Instrument for industrial process measurement and control. This product is designed for use in water treatment, chemical processing, and related industrial applications requiring reliable process measurement measurement. It is compatible with the GF Signet product ecosystem and meets industrial standards for performance and durability. Configured with 50 mm insertion/cable.
$1,149.42$1,295.00
Available for Purchase
Subject to factory lead times
The GF Signet 3-2831 is a Sensor/Instrument for industrial process measurement and control. This product is designed for use in water treatment, chemical processing, and related industrial applications requiring reliable process measurement measurement. It is compatible with the GF Signet product ecosystem and meets industrial standards for performance and durability.
$320.42$361.00
Available for Purchase
Subject to factory lead times
The GF Signet 2839 Dissolved Oxygen Sensor uses polarographic (galvanic) technology to measure dissolved oxygen in water and aqueous solutions from 0 to 20 mg/L (ppm). It includes a built-in temperature sensor for automatic salinity and pressure compensation, and outputs via S3L digital signal to Signet 9900/9950 transmitters. Ideal for wastewater aeration control, aquaculture, and environmental monitoring.
$468.65$528.00
Available for Purchase
Subject to factory lead times
The GF Signet 2839 Dissolved Oxygen Sensor uses polarographic (galvanic) technology to measure dissolved oxygen in water and aqueous solutions from 0 to 20 mg/L (ppm). It includes a built-in temperature sensor for automatic salinity and pressure compensation, and outputs via S3L digital signal to Signet 9900/9950 transmitters. Ideal for wastewater aeration control, aquaculture, and environmental monitoring. This specific variant (3-2839-1V-025) is configured with 25 mm insertion/cable.
$563.62$635.00
Available for Purchase
Subject to factory lead times
The GF Signet 2839 Dissolved Oxygen Sensor uses polarographic (galvanic) technology to measure dissolved oxygen in water and aqueous solutions from 0 to 20 mg/L (ppm). It includes a built-in temperature sensor for automatic salinity and pressure compensation, and outputs via S3L digital signal to Signet 9900/9950 transmitters. Ideal for wastewater aeration control, aquaculture, and environmental monitoring. This specific variant (3-2839-1V-050) is configured with 50 mm insertion/cable.
$652.38$735.00
Available for Purchase
Subject to factory lead times
The GF Signet 2839 Dissolved Oxygen Sensor uses polarographic (galvanic) technology to measure dissolved oxygen in water and aqueous solutions from 0 to 20 mg/L (ppm). It includes a built-in temperature sensor for automatic salinity and pressure compensation, and outputs via S3L digital signal to Signet 9900/9950 transmitters. Ideal for wastewater aeration control, aquaculture, and environmental monitoring. This specific variant (3-2839-1V-075) is configured with 75 mm insertion.
$736.70$830.00
Available for Purchase
Subject to factory lead times
The GF Signet 2839 Dissolved Oxygen Sensor uses polarographic (galvanic) technology to measure dissolved oxygen in water and aqueous solutions from 0 to 20 mg/L (ppm). It includes a built-in temperature sensor for automatic salinity and pressure compensation, and outputs via S3L digital signal to Signet 9900/9950 transmitters. Ideal for wastewater aeration control, aquaculture, and environmental monitoring. This specific variant (3-2839-1V-100) is configured with 100 mm insertion.
$822.79$927.00
Available for Purchase
Subject to factory lead times
The GF Signet 2839 Dissolved Oxygen Sensor uses polarographic (galvanic) technology to measure dissolved oxygen in water and aqueous solutions from 0 to 20 mg/L (ppm). It includes a built-in temperature sensor for automatic salinity and pressure compensation, and outputs via S3L digital signal to Signet 9900/9950 transmitters. Ideal for wastewater aeration control, aquaculture, and environmental monitoring.
$468.65$528.00
Available for Purchase
Subject to factory lead times
The GF Signet 2840 Dissolved Oxygen Sensor is an optical (luminescent) dissolved oxygen sensor that requires no membrane changes or electrolyte replacement. It measures 0 to 20 mg/L with high stability and minimal drift, ideal for long-term monitoring in wastewater treatment, industrial process water, and aquaculture. Outputs S3L digital signal to Signet 9900/9950 transmitters.
$468.65$528.00
Available for Purchase
Subject to factory lead times
The GF Signet 2840 Dissolved Oxygen Sensor is an optical (luminescent) dissolved oxygen sensor that requires no membrane changes or electrolyte replacement. It measures 0 to 20 mg/L with high stability and minimal drift, ideal for long-term monitoring in wastewater treatment, industrial process water, and aquaculture. Outputs S3L digital signal to Signet 9900/9950 transmitters.
$468.65$528.00
Available for Purchase
Subject to factory lead times
The GF Signet 2841 Dissolved Oxygen Sensor uses optical luminescence technology for reliable, low-maintenance dissolved oxygen measurement. Designed for submersion in open tanks and process vessels, it covers a range of 0 to 20 mg/L and communicates digitally with Signet transmitters via S3L protocol.
$598.23$674.00
Available for Purchase
Subject to factory lead times
The GF Signet 2841 Dissolved Oxygen Sensor uses optical luminescence technology for reliable, low-maintenance dissolved oxygen measurement. Designed for submersion in open tanks and process vessels, it covers a range of 0 to 20 mg/L and communicates digitally with Signet transmitters via S3L protocol.
$598.23$674.00
Available for Purchase
Subject to factory lead times
The GF Signet 2842 Dissolved Oxygen Sensor is designed for applications requiring submersible or flow-through installation. Using optical technology, it offers fast response, no drift, and extended calibration intervals for 0 to 20 mg/L measurement. Compatible with Signet 9900 and 9950 transmitters via S3L digital communication.
$663.03$747.00
Available for Purchase
Subject to factory lead times
The GF Signet 2842 Dissolved Oxygen Sensor is designed for applications requiring submersible or flow-through installation. Using optical technology, it offers fast response, no drift, and extended calibration intervals for 0 to 20 mg/L measurement. Compatible with Signet 9900 and 9950 transmitters via S3L digital communication.
$663.03$747.00
Available for Purchase
Subject to factory lead times
The GF Signet 2842 Dissolved Oxygen Sensor is designed for applications requiring submersible or flow-through installation. Using optical technology, it offers fast response, no drift, and extended calibration intervals for 0 to 20 mg/L measurement. Compatible with Signet 9900 and 9950 transmitters via S3L digital communication.
$134.03$151.00
Available for Purchase
Subject to factory lead times
The GF Signet 3-2845 is a Sensor/Instrument for industrial process measurement and control. This product is designed for use in water treatment, chemical processing, and related industrial applications requiring reliable process measurement measurement. It is compatible with the GF Signet product ecosystem and meets industrial standards for performance and durability.
$1,431.67$1,613.00
Available for Purchase
Subject to factory lead times
The GF Signet 2850 Conductivity/Resistivity Sensor Electronics module interfaces with Signet 2818-2824 contacting conductivity electrodes and outputs a digital S3L signal to Signet 9900 or 9950 transmitters. It provides automatic temperature compensation, on-board diagnostics, and calibration storage. Available with integrated display options for stand-alone use.
$544.98$614.00
Available for Purchase
Subject to factory lead times
The GF Signet 2850 Conductivity/Resistivity Sensor Electronics module interfaces with Signet 2818-2824 contacting conductivity electrodes and outputs a digital S3L signal to Signet 9900 or 9950 transmitters. It provides automatic temperature compensation, on-board diagnostics, and calibration storage. Available with integrated display options for stand-alone use.
$994.98$1,121.00
Available for Purchase
Subject to factory lead times
The GF Signet 2850 Conductivity/Resistivity Sensor Electronics module interfaces with Signet 2818-2824 contacting conductivity electrodes and outputs a digital S3L signal to Signet 9900 or 9950 transmitters. It provides automatic temperature compensation, on-board diagnostics, and calibration storage. Available with integrated display options for stand-alone use.
$994.98$1,121.00
Available for Purchase
Subject to factory lead times
The GF Signet 2850 Conductivity/Resistivity Sensor Electronics module interfaces with Signet 2818-2824 contacting conductivity electrodes and outputs a digital S3L signal to Signet 9900 or 9950 transmitters. It provides automatic temperature compensation, on-board diagnostics, and calibration storage. Available with integrated display options for stand-alone use.
$994.98$1,121.00
Available for Purchase
Subject to factory lead times