Gas Sensors
4 Series
City Tech’s 4-Series gas sensors are the industry standard for portable gas detectors. The range includes sensors which detect oxygen and toxic gases, carbon dioxide and hydrocarbons and fully certified pellistors for combustible gas detection
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Overview
Honeywell 4-Series gas sensors are the industry standard for use in portable gas detectors. The range includes sensors which detect oxygen, ammonia, hydrogen sulfide, carbon monoxide, chlorine, nitric oxide, and numerous toxic and fully certified pellistors for combustible gas detection.The 4 Series features a large, robust sensor design and is durable to withstand environmental demands. In addition to portable devices, the comprehensive range of sensors is suitable for fixed safety and emissions applications.Introducing the 4NH3LL-100
- The Honeywell 4NH3LL-100 is a 3-electrode electrochemical sensor designed to detect ammonia (NH3) levels ranging from 0 ppm to 100 ppm.
- This long-life sensor is suitable for both portable and fixed gas detection in diverse applications, including farming, refrigeration systems, and various industrial sectors such as food, semiconductor, and chemical industries.
- Sensor can operate constantly with background levels of ammonia without affecting the sensor’s performance - ideal for livestock and poultry farming applications.
- The sensor operates effectively within a temperature range of -20°C to 40°C and a humidity level from 15% to 90% RH. (Could be operated intermittently from -40°C to 50°C)
- It has a lifespan of two years in fresh air and is backed by a 12-month warranty from the date of shipment.
- The sensor exhibits a sensitivity of 30 nA/ppm (±20 nA/ppm) and a response time of less than 90 seconds.
Specifications
Options
- Brand
- Honeywell
- Honeywell Citytech
- Series Name
- 4
- 4CFC
- 4CM
- CiTiceL 4
Standards & Certifications
- Standards & Certifications
- AQ6205-2006
- ATEX
- EN 45544-2000
- EN/IEC 60079-0
- RoHS Compliant
- UL Certified - UL2075
- UL and CSA
Applications & Compatibility
- Recommended Load Resistor
- 10 Ohm
- 33 Ohm
- 5 Ohm
Operating Characteristics
- Storage Temperature
- 0 to 20°C
- 10 to 30°C
Features
- Operating Principle
- 2-Electrode Electrochemical
- 3-Electrode Electrochemical
- 4-Electrode Electrochemical
- Catalytic Oxidation
Electrical Specifications
- Maximum s/c Current
- < 1.0 A
Features & Benefits
- Features & Benefits
- Anti-Poisoning in the Environment with Acrylonitrile Background
- Compact Size
- Designed for Breath Analysis
- Enhanced Long-Term Stability
- Extended Operating Range
- Factory Calibrated MV Output
- Fast Response and Recovery Time
- High Sensitivity for Better Resolution
- Higher Durability and Stability
- Ideal for Portable Life Safety Applications
- Improved Performance Variability
- Industry Leading Reliability
- Long Life
- Low Cros Sensitivity To Hydrogen
- Low Long-Term Output Drift
- Low Temperature and Humidity Effect
- On-Board Hydrogen and Temperature Compensation
- Robust 3-Series Packaging
- Stable Performance Six Sigma Output Performance
Technical Specifications
- Auxiliary Electrode
- To Compensate for Maximum 2,000 ppm H2 Cross Interference
- Gases Detected
- Acrylonitrile
- Carbon Monoxide (CO)
- Chlorine (CL)
- Ethylene Oxide (C2H4O)
- Hydrogen (H)
- Hydrogen Cyanide (HCN)
- Hydrogen Sulfide (H2S)
- Most Combustible Gases and Vapours
- Nitric Oxide (NO)
- Nitrogen Dioxide (NO2)
- Sulfur Dioxide (SO2)
- Calibration
- via Built-in Span and Zero Potentiometer
Applicability
- Application
- Drainage and Sewage Areas
- Fire Detection
- Food Processing
- Leakage Detection
- Manufacturing Factories
- Mining Processes
- Portable & Fixed Life Safety
- Refineries
- Residential
- TVL Monitoring (Threshold Value Level)
- Ventilation Control
Overview
- Warranty
- 12 Months from Date of Dispatch
- 18 Months from Date of Dispatch
Options
- Brand
- Honeywell
- Honeywell Citytech
- Series Name
- 4
- 4CFC
- 4CM
- CiTiceL 4
Standards & Certifications
- Standards & Certifications
- AQ6205-2006
- ATEX
- EN 45544-2000
- EN/IEC 60079-0
- RoHS Compliant
- UL Certified - UL2075
- UL and CSA
Applications & Compatibility
- Recommended Load Resistor
- 10 Ohm
- 33 Ohm
- 5 Ohm
Operating Characteristics
- Storage Temperature
- 0 to 20°C
- 10 to 30°C
Features
- Operating Principle
- 2-Electrode Electrochemical
- 3-Electrode Electrochemical
- 4-Electrode Electrochemical
- Catalytic Oxidation
Electrical Specifications
- Maximum s/c Current
- < 1.0 A
Features & Benefits
- Features & Benefits
- Anti-Poisoning in the Environment with Acrylonitrile Background
- Compact Size
- Designed for Breath Analysis
- Enhanced Long-Term Stability
- Extended Operating Range
- Factory Calibrated MV Output
- Fast Response and Recovery Time
- High Sensitivity for Better Resolution
- Higher Durability and Stability
- Ideal for Portable Life Safety Applications
- Improved Performance Variability
- Industry Leading Reliability
- Long Life
- Low Cros Sensitivity To Hydrogen
- Low Long-Term Output Drift
- Low Temperature and Humidity Effect
- On-Board Hydrogen and Temperature Compensation
- Robust 3-Series Packaging
- Stable Performance Six Sigma Output Performance
Technical Specifications
- Auxiliary Electrode
- To Compensate for Maximum 2,000 ppm H2 Cross Interference
- Gases Detected
- Acrylonitrile
- Carbon Monoxide (CO)
- Chlorine (CL)
- Ethylene Oxide (C2H4O)
- Hydrogen (H)
- Hydrogen Cyanide (HCN)
- Hydrogen Sulfide (H2S)
- Most Combustible Gases and Vapours
- Nitric Oxide (NO)
- Nitrogen Dioxide (NO2)
- Sulfur Dioxide (SO2)
- Calibration
- via Built-in Span and Zero Potentiometer
Applicability
- Application
- Drainage and Sewage Areas
- Fire Detection
- Food Processing
- Leakage Detection
- Manufacturing Factories
- Mining Processes
- Portable & Fixed Life Safety
- Refineries
- Residential
- TVL Monitoring (Threshold Value Level)
- Ventilation Control
Overview
- Warranty
- 12 Months from Date of Dispatch
- 18 Months from Date of Dispatch
- Brand : Honeywell|Honeywell Citytech
- Standards & Certifications : AQ6205-2006|ATEX|EN 45544-2000|EN/IEC 60079-0|RoHS Compliant|UL Certified - UL2075|UL and CSA
- Recommended Load Resistor : 10 Ohm|33 Ohm|5 Ohm
- Storage Temperature : 0 to 20°C|10 to 30°C
- Operating Principle : 2-Electrode Electrochemical|3-Electrode Electrochemical|4-Electrode Electrochemical|Catalytic Oxidation
- Maximum s/c Current : < 1.0 A
- Features & Benefits : Anti-Poisoning in the Environment with Acrylonitrile Background|Compact Size|Designed for Breath Analysis|Enhanced Long-Term Stability|Extended Operating Range|Factory Calibrated MV Output|Fast Response and Recovery Time|High Sensitivity for Better Resolution|Higher Durability and Stability|Ideal for Portable Life Safety Applications|Improved Performance Variability|Industry Leading Reliability|Long Life|Low Cros Sensitivity To Hydrogen|Low Long-Term Output Drift|Low Temperature and Humidity Effect|On-Board Hydrogen and Temperature Compensation|Robust 3-Series Packaging|Stable Performance Six Sigma Output Performance
- Auxiliary Electrode : To Compensate for Maximum 2,000 ppm H2 Cross Interference
- Gases Detected : Acrylonitrile|Carbon Monoxide (CO)|Chlorine (CL)|Ethylene Oxide (C2H4O)|Hydrogen (H)|Hydrogen Cyanide (HCN)|Hydrogen Sulfide (H2S)|Most Combustible Gases and Vapours|Nitric Oxide (NO)|Nitrogen Dioxide (NO2)|Sulfur Dioxide (SO2)
- Series Name : 4|4CFC|4CM|CiTiceL 4
- Calibration : via Built-in Span and Zero Potentiometer
- Application : Drainage and Sewage Areas|Fire Detection|Food Processing|Leakage Detection|Manufacturing Factories|Mining Processes|Portable & Fixed Life Safety|Refineries|Residential|TVL Monitoring (Threshold Value Level)|Ventilation Control
- Warranty : 12 Months from Date of Dispatch|18 Months from Date of Dispatch
Data Sheet
Name
Description
File Size
Date
Size
CiTiceL 4CFC Carbon Monoxide (CO) Gas Sensor
application/pdf 330.73 KB
11/9/2023
330.73 KB
SURECELL™ H2S(H) Hydrogen Sulfide (H2S) Gas Sensor
application/pdf 313.54 KB
11/9/2023
313.54 KB
SURECELL™ 4HS GAS SENSOR - Hydrogen Sulfide (H2S) Gas Sensor
application/pdf 318.67 KB
11/9/2023
318.67 KB
SURECELL™ H2S(L) Hydrogen Sulfide (H2S) Gas Sensor
application/pdf 321.43 KB
11/9/2023
321.43 KB
4-H2S 1000 Classic Line Hydrogen Sulfide (H2S) Gas Sensor
application/pdf 383.82 KB
11/9/2023
383.82 KB
ECO-SURE X Carbon Monoxide (CO) Sensor
application/pdf 337.78 KB
8/19/2021
337.78 KB
CiTiceL 4OXV Oxygen (O2) Sensor
application/pdf 317.67 KB
8/19/2021
317.67 KB
Citytech 5OXLL (Emissions) sensor Datasheet
application/pdf 1.27 MB
7/15/2021
1.27 MB
CiTipeL 4P75M Combustible Gas Sensor
application/pdf 495.47 KB
8/19/2021
495.47 KB
CiTipeL 4P75 Combustible Gas Sensor Data Sheet
application/pdf 546.82 KB
2/6/2025
546.82 KB
CiTipeL 4P90M Combustible Gas Sensor
application/pdf 495.26 KB
8/19/2021
495.26 KB
CiTipeL 4P50 Combustible Gas Sensor
application/pdf 570.21 KB
8/19/2021
570.21 KB
CiTipeL 4P75C Combustible Gas Sensor
application/pdf 536.85 KB
8/19/2021
536.85 KB
CiTipeL 4P50M Combustible Gas Sensor
application/pdf 495.12 KB
8/19/2021
495.12 KB
CiTipeL 4P90 Combustible Gas Sensor
application/pdf 522.54 KB
8/19/2021
522.54 KB
Citytech 4OXLL industrial sensor Datasheet
application/pdf 246.79 KB
11/24/2021
246.79 KB
CiTipeL 4P50C Combustible Gas Sensor
application/pdf 533.05 KB
8/19/2021
533.05 KB
CiTipeL 4P90C Combustible Gas Sensor
application/pdf 534.02 KB
8/19/2021
534.02 KB
CiTiceL 4HS/LM Hydrogen Sulfide (H2S) Sensor
application/pdf 93.75 KB
8/19/2021
93.75 KB
CiTiceL 4HS+ Hydrogen Sulfide (H2S) Sensor
application/pdf 321.7 KB
11/9/2023
321.7 KB
CiTipeL 4P75C T4 Combustible Gas Sensor
application/pdf 463.99 KB
8/19/2021
463.99 KB
Brochure
Name
Description
File Size
Date
Size
Industrial Applications: Going Beyond Limits
application/pdf 16.68 MB
2/11/2025
16.68 MB
Controlling the Future with Technology
application/pdf 11.8 MB
3/7/2023
11.8 MB
Detecting the Third Element, Honeywell Gas Sensing
application/pdf 4.87 MB
6/7/2022
4.87 MB
Application Note
Name
Description
File Size
Date
Size
4NH3LL-100 Long Life Sensor for Ammonia Detection App Note
application/pdf 3.27 MB
2/28/2025
3.27 MB
Solutions For Healthier Air & HVAC Systems
application/pdf 3.88 MB
5/31/2022
3.88 MB
Switches and Sensors Solutions for Industrial Applications -
application/pdf 2.48 MB
5/24/2023
2.48 MB
Others
Name
Description
File Size
Date
Size
A Breakthrough In Ammonia Sensing Flyer
application/pdf 871.17 KB
4/1/2025
871.17 KB
Name
Description
File Size
Date
Size
A Breakthrough In Ammonia Sensing Flyer
application/pdf 871.17 KB
4/1/2025
871.17 KB
4NH3LL-100 Long Life Sensor for Ammonia Detection App Note
application/pdf 3.27 MB
2/28/2025
3.27 MB
Industrial Applications: Going Beyond Limits
application/pdf 16.68 MB
2/11/2025
16.68 MB
Controlling the Future with Technology
application/pdf 11.8 MB
3/7/2023
11.8 MB
Solutions For Healthier Air & HVAC Systems
application/pdf 3.88 MB
5/31/2022
3.88 MB
Detecting the Third Element, Honeywell Gas Sensing
application/pdf 4.87 MB
6/7/2022
4.87 MB
CiTiceL 4CFC Carbon Monoxide (CO) Gas Sensor
application/pdf 330.73 KB
11/9/2023
330.73 KB
SURECELL™ H2S(H) Hydrogen Sulfide (H2S) Gas Sensor
application/pdf 313.54 KB
11/9/2023
313.54 KB
SURECELL™ 4HS GAS SENSOR - Hydrogen Sulfide (H2S) Gas Sensor
application/pdf 318.67 KB
11/9/2023
318.67 KB
SURECELL™ H2S(L) Hydrogen Sulfide (H2S) Gas Sensor
application/pdf 321.43 KB
11/9/2023
321.43 KB
4-H2S 1000 Classic Line Hydrogen Sulfide (H2S) Gas Sensor
application/pdf 383.82 KB
11/9/2023
383.82 KB
Switches and Sensors Solutions for Industrial Applications -
application/pdf 2.48 MB
5/24/2023
2.48 MB
ECO-SURE X Carbon Monoxide (CO) Sensor
application/pdf 337.78 KB
8/19/2021
337.78 KB
CiTiceL 4OXV Oxygen (O2) Sensor
application/pdf 317.67 KB
8/19/2021
317.67 KB
Citytech 5OXLL (Emissions) sensor Datasheet
application/pdf 1.27 MB
7/15/2021
1.27 MB
CiTipeL 4P75M Combustible Gas Sensor
application/pdf 495.47 KB
8/19/2021
495.47 KB
CiTipeL 4P75 Combustible Gas Sensor Data Sheet
application/pdf 546.82 KB
2/6/2025
546.82 KB
CiTipeL 4P90M Combustible Gas Sensor
application/pdf 495.26 KB
8/19/2021
495.26 KB
CiTipeL 4P50 Combustible Gas Sensor
application/pdf 570.21 KB
8/19/2021
570.21 KB
CiTipeL 4P75C Combustible Gas Sensor
application/pdf 536.85 KB
8/19/2021
536.85 KB
CiTipeL 4P50M Combustible Gas Sensor
application/pdf 495.12 KB
8/19/2021
495.12 KB
CiTipeL 4P90 Combustible Gas Sensor
application/pdf 522.54 KB
8/19/2021
522.54 KB
Citytech 4OXLL industrial sensor Datasheet
application/pdf 246.79 KB
11/24/2021
246.79 KB
CiTipeL 4P50C Combustible Gas Sensor
application/pdf 533.05 KB
8/19/2021
533.05 KB
CiTipeL 4P90C Combustible Gas Sensor
application/pdf 534.02 KB
8/19/2021
534.02 KB
CiTiceL 4HS/LM Hydrogen Sulfide (H2S) Sensor
application/pdf 93.75 KB
8/19/2021
93.75 KB
CiTiceL 4HS+ Hydrogen Sulfide (H2S) Sensor
application/pdf 321.7 KB
11/9/2023
321.7 KB
CiTipeL 4P75C T4 Combustible Gas Sensor
application/pdf 463.99 KB
8/19/2021
463.99 KB
Name
Date
Size
3/3/2025
8/19/2021
8/19/2021
7/15/2021
8/19/2021
2/6/2025
8/19/2021
8/19/2021
8/19/2021
8/19/2021
8/19/2021
8/19/2021
8/19/2021
8/19/2021
3/3/2025
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15PA148-CX
ENCLOSED BASIC - SPARE PART
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
15PA148-CX
ENCLOSED BASIC - SPARE PART
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
15PA500-CX
ENCLOSED SWITCH PART-ADAPTER PLATE
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
15PA500-CX
ENCLOSED SWITCH PART-ADAPTER PLATE
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
15PA85-EX
UNSEALED OI-PB SWITCH - SPARE PART
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
15PA85-EX
UNSEALED OI-PB SWITCH - SPARE PART
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2003
SURECELL CO(M)
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2003
SURECELL CO(M)
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2003R
Carbon Monoxide CO 4-series Replacement Sensor CO(M) (0-1000ppm) Surecell
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2003R
Carbon Monoxide CO 4-series Replacement Sensor CO(M) (0-1000ppm) Surecell
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2004
SURECELL CO(H)
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2004
SURECELL CO(H)
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2005
Carbon Monoxide CO 4-series Sensor 4CF+ (0-500ppm) CiTiceL
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2005
Carbon Monoxide CO 4-series Sensor 4CF+ (0-500ppm) CiTiceL
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2005R
4CF+ CO SENSOR IN POT
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2005R
4CF+ CO SENSOR IN POT
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2006
Carbon Monoxide CO 4-series Sensor 4CFC (0-1000ppm) CiTiceL
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2006
Carbon Monoxide CO 4-series Sensor 4CFC (0-1000ppm) CiTiceL
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2006R
CO 4CFC 1,000PPM 4SERIES SENSOR REP.
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
2112B2006R
CO 4CFC 1,000PPM 4SERIES SENSOR REP.
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-citytech-4-series
