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 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$563.62$635.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-1C) is configured with 1m integral cable.
$664.80$749.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-1P-025) is configured with 1-inch pipe size, 25 mm insertion/cable.
$569.83$642.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-1P-050) is configured with 1-inch pipe size, 50 mm insertion/cable.
$655.04$738.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-S1) is configured with socket connection, channel 1.
$1,133.44$1,277.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$1,239.95$1,397.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-S2) is configured with socket connection, channel 2.
$1,340.25$1,510.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$1,424.57$1,605.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-T1) is configured with threaded connection, 4-20 mA.
$1,587.00$1,788.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$1,673.98$1,886.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-T2) is configured with threaded connection, voltage.
$1,797.35$2,025.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$1,880.79$2,119.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$317.76$358.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$89.65$101.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$317.76$358.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures.
$563.62$635.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-1C) is configured with 1m integral cable.
$664.80$749.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-1P-025) is configured with 1-inch pipe size, 25 mm insertion/cable.
$569.83$642.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-1P-050) is configured with 1-inch pipe size, 50 mm insertion/cable.
$655.04$738.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-1P-100) is configured with 1-inch pipe size, 100 mm insertion.
$539.65$608.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-3K-025) is configured with 3-electrode, PVDF body, 25 mm insertion/cable.
$1,476.94$1,664.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-S1) is configured with socket connection, channel 1.
$1,133.44$1,277.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures.
$1,239.95$1,397.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-S2) is configured with socket connection, channel 2.
$1,340.25$1,510.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$563.62$635.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-1C) is configured with 1m integral cable.
$664.80$749.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-1P-025) is configured with 1-inch pipe size, 25 mm insertion/cable.
$569.83$642.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-1P-050) is configured with 1-inch pipe size, 50 mm insertion/cable.
$655.04$738.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-S1) is configured with socket connection, channel 1.
$1,133.44$1,277.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$1,239.95$1,397.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-S2) is configured with socket connection, channel 2.
$1,340.25$1,510.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$1,424.57$1,605.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-T1) is configured with threaded connection, 4-20 mA.
$1,587.00$1,788.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$1,673.98$1,886.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles. This specific variant (3-2820-T2) is configured with threaded connection, voltage.
$1,797.35$2,025.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$1,880.79$2,119.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$317.76$358.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$89.65$101.00
Available for Purchase
Subject to factory lead times
The GF Signet 2820 Conductivity/Resistivity Electrode is a 2-electrode contacting sensor with a cell constant of 1.0 cm⁻¹, suited for general-purpose conductivity measurement in water treatment, cooling water, and process control (10 µS/cm to 200 mS/cm). Available with PVDF or PP body and NPT or DIN connection styles.
$317.76$358.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures.
$563.62$635.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-1C) is configured with 1m integral cable.
$664.80$749.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-1P-025) is configured with 1-inch pipe size, 25 mm insertion/cable.
$569.83$642.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-1P-050) is configured with 1-inch pipe size, 50 mm insertion/cable.
$655.04$738.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-1P-100) is configured with 1-inch pipe size, 100 mm insertion.
$539.65$608.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-3K-025) is configured with 3-electrode, PVDF body, 25 mm insertion/cable.
$1,476.94$1,664.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-S1) is configured with socket connection, channel 1.
$1,133.44$1,277.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures.
$1,239.95$1,397.00
Available for Purchase
Subject to factory lead times
The GF Signet 2821 Conductivity/Resistivity Electrode features a 10.0 cm⁻¹ cell constant for high-conductivity applications such as concentrated chemical solutions, brine, or seawater (1 mS/cm to 2 S/cm). Its robust PVDF or PP construction withstands aggressive chemicals and elevated temperatures. This specific variant (3-2821-S2) is configured with socket connection, channel 2.
$1,340.25$1,510.00
Available for Purchase
Subject to factory lead times