HH4500 Two-Electrode Conductivity Sensor| 316L Stainless Steel Body
US$180.00
A 316L stainless-steel, two-electrode conductivity sensor available in four measurement ranges from 0.01 to 20,000 μS/cm. The HH4500 combines selectable cell configurations, optional temperature elements, a G3/4 process connection, and IP68 construction for pure water, reverse osmosis, tap water, surface water, and compatible industrial water systems.
Key features
- Four selectable conductivity ranges
- Two-electrode measurement design
- 316L stainless-steel housing and electrodes
- Optional NTC, Pt100, or Pt1000 temperature element
- Operation at temperatures up to 100 °C and pressures up to 8 bar
- G3/4 process connection with integrated cable
The HH4500 is a two-electrode conductivity sensor series designed for continuous measurement from low-conductivity water through medium-conductivity process liquids. Four configurations are available, with each using an appropriate cell constant and transmitter range for its intended measurement interval.
The sensor applies an electrical excitation between two electrodes and measures the resulting conductance of the liquid. The configured cell constant converts this conductance into conductivity. Selecting the correct cell constant is important: a configuration optimized for pure water is not automatically suitable for the entire 0.01 to 20,000 μS/cm combined range.
The measuring structure uses 316L stainless steel for the housing and electrode surfaces, providing mechanical strength and compatibility with many water-treatment applications. The complete wetted-material construction—including electrical insulators, seals, and cable entry—must still be checked against the process chemistry.
Optional NTC, Pt100, and Pt1000 temperature elements allow the sensor to supply process-temperature data to a compatible conductivity transmitter. The transmitter must use an appropriate compensation model for the actual water chemistry because pure water, salts, acids, alkalis, and mixed industrial water do not share one universal temperature coefficient.
With a standard 60 mm insertion depth, G3/4 process connection, integrated cable, and IP68-rated construction, the HH4500 can be configured for compatible pipeline, flow-through, or immersion installations.
Key benefits
- Wide series coverage: Four sensor configurations cover measurement ranges from 0.01 to 20,000 μS/cm.
- Two-electrode construction: Provides a straightforward measurement platform for low- to medium-conductivity liquids.
- 316L stainless-steel structure: Supports mechanically robust installation in compatible water systems.
- Integrated temperature measurement: Multiple temperature-element options are available for transmitter matching.
- Process-rated construction: Specified for temperatures up to 100 °C and pressures up to 8 bar.
- Flexible installation: Pipeline and immersion configurations can be supplied.
- Customizable insertion depth: Sensor length can be adapted to specific installation requirements.
Range and cell selection
| Conductivity range | Typical application direction |
|---|---|
| 0.01–20 μS/cm | High-purity water, demineralized water, RO permeate |
| 0.1–200 μS/cm | Purified water, low-conductivity process water |
| 1–2,000 μS/cm | Tap water, surface water, general water treatment |
| 10–20,000 μS/cm | Circulating water and compatible industrial water |
These application directions are preliminary. The actual cell constant, transmitter capability, temperature model, process composition, and expected normal value should determine the selected version.
Configuration options
- Measurement range and cell constant: Selected according to the normal and maximum expected process conductivity.
- Temperature element: NTC 2.252K, NTC 10K, NTC 22K, Pt100, or Pt1000.
- Insertion depth: Custom lengths are available for specific pipelines and vessels.
- Installation configuration: Pipeline or immersion versions are available.
- Extended cable: Cable lengths up to 30 metres, subject to transmitter compatibility and low-conductivity performance.
- Process connection: Confirm the required thread standard and sealing method before ordering.
Measurement and installation notes
For low-conductivity water, keep the flow cell and piping clean and prevent air ingress, carbon-dioxide absorption, stagnant water, and contamination from unsuitable tubing or fittings. Small amounts of contamination can substantially change the reading.
For higher-conductivity media, two-electrode sensors can be affected by electrode polarization. Confirm that the selected cell constant and transmitter excitation method are suitable for the expected range.
Deposits on the electrode surface change the effective cell geometry and can cause measurement error. Conductive deposits may increase the reading, while insulating scale or coatings may reduce it.
Temperature compensation must be matched to the sample. A linear salt-solution coefficient should not automatically be used for high-purity water or chemically specific process liquids.
Long cables can add electrical capacitance and affect low-conductivity measurements. Confirm the 30-metre option with the intended transmitter and required measurement range.
Application
- Pure & High-Purity Water
- Reverse Osmosis Systems
- Demineralized Water
- Municipal & Tap Water
- Surface Water Monitoring
- Recirculating & Cooling Water
- Industrial Water Treatment
- Compatible Wastewater Applications
- OEM Water-Treatment Equipment
| Measurement Range | 0.01~20μS/cm; 0.1~200μS/cm; 1~2000μS/cm; 10~20000μS/cm |
| Accuracy | ±1% |
| Temperature Range | 0~100℃ |
| Pressure Range | 0~8Bar |
| Temperature Compensation | NTC10K, NTC2.252K, NTC22K, PT100, PT1000 (optional) |
| Response Time | <10S |
| Installation Thread | G3/4 |
| Housing Material | 316L Stainless Steel |
| Insertion Depth | 60mm |
| Cable Connection | Integrated direct connection |
*Confirm whether accuracy is ±1% of reading, full scale, or span, and whether it includes the sensor, transmitter, calibration, and temperature compensation.
**The allowable pressure at 100 °C must be confirmed using the product’s pressure-temperature rating.
***Confirm whether response time refers to conductivity response, temperature response, or the assembled sensor.
| Weight | 0.3 kg |
|---|---|
| Dimensions | 20 × 6 × 6 cm |
| Measurement | Conductivity |
| Temperature Compensation Options | NTC 2.252K, NTC 5K, NTC 10K, NTC 22K, NTC 30K, PT100, PT1000 |
| Parameters | Conductivity |
| Cable Connection | 4 PIN, Integrated direct-connection cable, K2, K8S, K9, S7, S8, S8M, VP, VP4 |
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