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Endress+Hauser CLS21-C1E4A | 2-Electrode Conductivity Sensor, k=1, G1", Pt100

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Endress+Hauser CLS21-C1E4A | 2-Electrode Conductivity Sensor, k=1, G1", Pt100

Endress+Hauser CLS21-C1E4A | 2-Electrode Conductivity Sensor, k=1, G1", Pt100
Endress+Hauser CLS21-C1E4A | 2-Electrode Conductivity Sensor, k=1, G1", Pt100 Endress+Hauser CLS21-C1E4A | 2-Electrode Conductivity Sensor, k=1, G1", Pt100 Endress+Hauser CLS21-C1E4A | 2-Electrode Conductivity Sensor, k=1, G1", Pt100 Endress+Hauser CLS21-C1E4A | 2-Electrode Conductivity Sensor, k=1, G1", Pt100

Large Image :  Endress+Hauser CLS21-C1E4A | 2-Electrode Conductivity Sensor, k=1, G1", Pt100 Get Best Price

Product Details:
Place of Origin: DE
Brand Name: Endress+Hauser
Certification: ATEX
Model Number: CLS21-C1E4A
Document: ACH-AB-P+F-E+H-IFM-ASCO-YOK...WA.pdf
Payment & Shipping Terms:
Minimum Order Quantity: 1
Price: Negotiable
Packaging Details: carton
Delivery Time: Negotiable
Payment Terms: T/T,XT,ALIPAY
Supply Ability: 100pcs per month
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Detailed Product Description
Power Supply: 1 Ambient Temperature: -
Electrical Rating: G Certifications: S
Highlight:

Endress+Hauser CLS21 conductivity sensor

,

2-electrode conductivity sensor G1

,

conductivity sensor with Pt100

Endress+Hauser CLS21-C1E4A | 2-Electrode Conductivity Sensor, k=1, G1", Pt100

Endress+Hauser CLS21-C1E4A analog conductivity sensor. Measures 10 µS/cm–20 mS/cm, G1" PES body, 4-pin DIN plug, integrated Pt100, ATEX certified for harsh environments.

Product Overview

The Endress+Hauser CLS21-C1E4A​ is a robust 2-electrode conductive conductivity sensor​ from the Condumax CLS21 series. Designed for medium to high conductivity ranges, it features a G1" threaded process connection​ in PES material and a 4-pin DIN connector​ with integrated Pt100 temperature sensor. This sensor is ATEX certified for use in hazardous areas and is built to withstand harsh process conditions in water treatment and chemical applications.

Technical Specifications (Measurement & Electrical)

Parameter

Specification

Model / Order Code​

CLS21-C1E4A​

Measuring Principle​

Conductive (2-Electrode)​

Cell Constant (k)​

1.0 cm⁻¹​

Measuring Range​

10 µS/cm ... 20 mS/cm​

Temperature Sensor​

Pt100​ (Integrated)

Electrical Connection​

4-pin DIN Plug​ (Pg 9 thread)

Signal Type​

Analog (Resistive)

Technical Specifications (Mechanical & Process)

Parameter

Specification

Process Connection​

G1" Thread​

Sensor Body Material​

PES​ (Polyethersulfone)

Electrode Material​

Graphite

Process Temperature​

-20 ... +135 °C​ (max 2.5 bar)

Process Pressure​

0 ... 16 bar​ (at 20 °C)

Protection Rating​

IP65​ (Plug-in Head)

Dimensions (Dia. x L)​

~24 mm x 61 mm

Hazardous Area​

ATEX Certified​ (Zone 1)

Key Features

  • Robust Process Design:​ The PES sensor body​ and graphite electrodes offer high chemical and thermal stability, suitable for aggressive media and temperatures up to 135°C.

  • Integrated Temperature Compensation:​ Built-in Pt100 sensor​ ensures accurate conductivity readings across the full operating range without requiring an external temperature probe.

  • Hazardous Area Compliance:​ Certified for use in ATEX Zone 1​ (and typically FM/IECEx) explosive atmospheres, making it ideal for chemical and petrochemical plants.

  • Plug-and-Play Connector:​ The 4-pin DIN connector​ (Pg9) allows for quick sensor replacement and easy connection to compatible transmitters like the Liquisys series.

Applications

  • Industrial Water Treatment:​ Conductivity monitoring in demineralization, reverse osmosis (RO), and cooling water systems.

  • Chemical Process:​ Concentration measurement of acids, alkalis, and process solutions in mixing and dosing applications.

  • Phase Separation:​ Interface detection (e.g., product/water) in pipelines and tanks based on conductivity differences.

  • Potable & Wastewater:​ General water quality monitoring in municipal and industrial effluent streams.

Endress+Hauser CLS21-C1E4A | 2-Electrode Conductivity Sensor, k=1, G1", Pt100 0

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About ACH

Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL  to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.

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Frequently Ask & Questions
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Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.

Are the Products Genuine OEM Units?

Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.

How will you arrange shipment?

We'll handle the shipping for you. Through our partnerships, we can secure competitive rates with major carriers like FedEx, DHL, TNT, and UPS, ensuring a smooth and cost-effective delivery.

What is the warranty of goods?

One-year Warranty.

How long is the logistics cycle of the product?

Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.

Ratings & Review

Overall Rating

5.0
Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings
5 stars
100%
4 stars
0%
3 stars
0%
2 stars
0%
1 stars
0%

All Reviews

M
Muhammad Usman
Pakistan May 23.2026
Helpful (1)
Highly accurate, fast delivery, works perfectly!
H
Hassan
Pakistan May 18.2026
Helpful (1)
Great HART transmitter, stable readings and easy to integrate.
S
Siti Aisyah
Malaysia May 9.2026
Helpful (1)
This Endress+Hauser pressure transmitter works perfectly, very reliable!
Tag:

e&h instruments,

e and h flow meter,

e&h flow meter

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