C-16 PortaSens II Gas Detector

Portable ozone detector great for ozone leak detection, personnel safety, and general O3 detection.  There are 4 available ozone sensor ranges, also capable of sensing multiple gasses (see list below) with simple sensor swaps.  Integrated datalogging, and audible alarms. 

C16 has been replaced with the D16 - CLICK HERE


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The C16 is a great device for ozone leak detection, personal safety, spot checks, confined entry, or even datalogging of ozone levels in a workplace.  The C16 is a great portable monitor, but can also serve as fixed monitor placed in a location where it logs data over long periods of time.

 There are 4 available ozone sensors to choose from:

0-1000 ppb

  • 0-1000 ppb standard range
  • 0-500 ppb minimum range
  • 0-2000 ppb maximum range
  • Units of measure = ppb (parts per billion)
  • 1 ppb resolution

 0-2 ppm

  • 0-2 ppm standard range
  • 0-1 ppm minimum range
  • 0-5 ppm maximum range
  • Units of measure = ppm (parts per million)
  • 0.01 ppm resolution

 0-20 ppm

  • 0-20 ppm standard range
  • 0-5 ppm minimum range
  • 0-200 ppm maximum range
  • Units of measure = ppm (parts per million)
  • 0.1 ppm resolution

 0-1,000 ppm

  • 0-1,000 ppm standard range
  • 0-200 ppm minimum range
  • 0-1,000 ppm maximum range
  • Units of measure = ppm (parts per million)
  • 1 ppm resolution


The C16 is a great Mulit-gas sensor that will allow for a variety of gasses to be measured with the same device.  Choose the gas sensor you require, or choose additional sensors here, to add to your order.  Each gas sensor is listed with a standard range, however each sensor can be calibrated to custom ranges.  Contact us for details on gas sensors you do not see here, or gas ranges you may require.

C16 Features

  • Four Ozone sensor ranges to choose from
  • Interchangeable “Smart Sensors” for over 30 gases
  • Internal sample pump and external sampling wand
    Standard “D” cell battery and rechargeable backup battery
  • One-hand pistol grip design
  • Easy to read back-lit graphics liquid crystal display
  • Instantaneous and timed-sampling modes of operation
  • Visual and Audible alarms
  • Internal data-logger with RS-232 output


The Series C16 PortaSens II portable ozone leak detector is a versatile tool for performing regular leak checks in ozone storage areas, around process equipment and piping, or in confined spaces prior to entry. Designed for easy one-hand operation, the detector contains an internal sample pump and a flexible sampling wand to allow pinpoint location of the source of leakage. A large character display insures that measured values are easily visible, and a back-light for the display insures readability in low or no light conditions.

A unique feature of the C16 detector is its ability to measure a variety of different gases by simply inserting the appropriate sensor for that gas. This means that one detector can be used to measure over 30 different gases or vapors, reducing the need to purchase individual detectors for each type of gas. And sensors can be changed quickly and easily, without the need for calibration when a sensor change is made.

Sensors used in the PortaSens II are ATI’s newest miniaturized smart sensor modules. Each sensor module is actually a sensor, amplifier, and memory module in one compact package. Because of this design, sensor modules can be calibrated independently and simply plugged into any detector for immediate use. When installed in a detector, calibration data is loaded into the microprocessor so that no adjustments are needed. The result is that a detector can, for example, go from phosgene measurement to ammonia measurement in less than one minute.

PortaSens II ozone Detectors are supplied in a padded
carrying case for easy storage and transport. Space is
provided for an extra battery plus up to two sensor keepers,
which means up to 8 extra sensors ready for immediate use.

The following components are standard:

  • PortaSens ozone Detector
  • Spare Filters
  • 10” Teflon Lined Sampling Wand
  • Flowmeter
  • RS-232 Output Cable
  • Battery Charger
  • Spare “D” Cell Battery
  • Sensor Keeper for up to 4 additional sensors
  • Calibration “T” Fitting

Click HERE to add additional gas sensors to your order.

C16 PortaSense accessories


Changing Sensors in the C16:

Sensors in the C16 can be changed easily.  See image below.

Remove 2 thumbscrews from the sensor cover, remove the sensor cover, and swap sensors.  If you are using the sensor keeper (included with the C16) spare sensors can be kept warm and ready to use.  Spare sensor keeper allows for use of a battery to keep power to the sensors.  Therefore, after swapping sensors there is virtually no delay in measuring your new gas!


Datalogging with the C16:

The C16 is capable of onboard data logging of your ozone measurements.  All data logging cables and software are included with the C16.  Datalogging is easy to set-up and easy to use.

The C16 is capable of storing 11,520 data points.   Data logging intervals of 1, 5, 10, and 15 minutes are possible.  The follwing data logging is possible

  • 1 minute interval = 8 days of data
  • 5 minute interval = 40 days of data
  • 10 minute interval = 80 days of data
  • 15 minute interval = 120 days of data

The screenshot below shows the datalogging set-up of the C16.  A very simple interface is used to set-up your data logging software and downoald.

C16 Data Logging Set-up

Data is logged with C16 and downloaded.  All data is exported to a CSV file that can be graphed or shown as a table with common spreadsheet software on your computer.

 C-16 logged data



C16 Specifications

Range User adjustable within limits of selected sensor
Display Back-lit graphics liquid crystal display
Accuracy Sensor dependent but generally ± 5% of value (limited by cal. gas)
Repeatability  ±1% (Electronic)
Sensitivity:  1% of sensor module range
RS-232 output of stored gas values,   0-1 VDC analog (requires optional output cable)
Memory 12,000 data points
Storage Interval Programmable for 1, 5, 10, and 15 minute intervals
Power: D cell battery, alkaline recommended, 75 hours operation Internal rechargeable battery for backup power, 6 hours operation 115 or 220 VAC chargers available
Detector Material: Glass filled nylon, PVC, and stainless steel
Alarm Relays: Three SPDT, 5 A @ 230 VAC resistive
Three concentration alarms with adjustable setpoints. Alarms may be set for high, low, or off. Low flow and low battery alarms Alarms displayed on LCD and indicated by audible beeper


 Ozone Sensor Cross Sensitivities

Chart below shows the gasses that are cross sensitive and will create a false response to the H10 Ozone Sensor.

Note: 0-1000 ppm low range ozone sensor (H10-14) may exhibit low response to certain other gases not listed.  When applying this sensor to specific applications, it is good practice toverify whether or not any of these potential interferences are present and might present interference issues. 

Cross-sensitifity data is approximate and based on exposure under 100 ppm.

Gas Symbol Response to 1 ppm
Hydrogen Sulfide H2S


Nitrogen Dioxide NO2 0.15
Sulfer Dioxide SO2 -0.01
Methyl Mercaptan CH3SH -0.03
Chlorine CL2 1
Hydrogen Cyanide HCN -0.5
Ethanol (alchohol) C2H6O None
Ammonia NH3 None
Hydrogen Chloride HCL None
Carbon Monoxide CO None
Carbon Dioxide CO2 None
Nitric Oxide NO None
Hydrogen Fluoride HF None



C16 Product Spec Sheet

C16 Product Manual

Ozone Sensor Specifications


Links to more info:

Calibration information

ATI Specific Calibration Information


 We provide each sensor with a standard detection range.  However, for specific applications each sensor can be calibrated to custom ranges.  See list below for min, and max range options for each sensor, along with standard range.

Please contact us with any questions on what sensor might be right for you, or if other sensors are available for your application.

 C16 Sensor specificationsClick on image to expand


View a list of the C16 accessories.

 Information on the Private Label of the C16's

More Information
Manufacturer ATI
Call For Price No
Gas Acid Gases, Acetic Acid, Acteylene (C2H2), Alcohol, Ammonia (NH3), Arsine (AsH3), Bromine (Br2), Carbon Monoxide (CO), Chlorine (Cl2), Chlorine Dioxide (ClO2), Diborane (B2H6), Dimethylamine, Ethylene Oxide (ETO), Fluorine (F2), Formaldehyde (CH2O), Germane (GeH4), Hydrocarbon (HC), Hydrogen (H2), Hydrogen Bromide (HBr), Hydrogen Chloride (HCl), Hydrogen Cyanide (HCN), Hydrogen Fluoride (HF), Hydrogen Peroxide (H2O2), Hydrogen Selenide (H2Se), Hydrogen Sulfide (H2S), Iodine (I2), Nitric Oxide (NO), Nitrogen Dioxide (NO2), Nitrogen Oxides (NOx), Oxygen (O2), Ozone (O3), Peracetic Acid, Phosgene (COCl2), Phosphine (PH3), Silane (SiH4), Sulfur Dioxide (SO2)
4-20 mA Output No
Field Replaceable Sensor Yes
Auto Test Generator None
Min, Max, Avg No
Voltage Output 0-1 V
Power Requirements D cell battery, alkaline recommended, 75 hours operation Internal rechargeable Nicad for backup power, 6 hours operation 120 or 220 VAC chargers available
Datalogging Yes
Rechargeable Yes
Field Replaceable Battery Yes
Warranty 1 Year
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