F12-D Gas Monitor

The Series F12D Gas Transmitter is designed for detection of a variety of toxic gases in hazardous area applications.  In addition, it is also well suited for all general purpose applications where toxic gas measurement is required. The F12D is highly customizable to suit almost every fixed mount toxic gas application.

As low as $1,175.00

The Series F12 Gas Transmitter is well suited for all general purpose applications where toxic gas measurement is required.

F12 Transmitters use ATI's standard smart sensors for maximum flexibility.  Sensors are easily exchanged and contain all calibration constants in sensor memory, eliminating the need for field calibration of transmitters.  Sensors may be calibrated separately on the bench and then simply plugged into the transmitter.  Calibration data is read into the transmitter automatically and no other adjustments are normally required.

For Intrinsically Safe (IS) applications, the F12 transmitter is available as an F-12is version.  One version provides for easy interface to RS-484 networks using a standard MODBUS communication protocol.  A second version provides a complete AC powered instrument with 3 alarm relays (SPST) available for external alarming


F12 Options (how to order)

Note: The F-12 is highly customizable to fit your every need.  Please review the options closely to ensure you choose the right configuration for your application.  Please call if you have any questions or need help configuring the right sensor for your application.

Sensor Module:

Choose the gas and range of detection required for your application

Transmitter Type: Choose the voltage that is right for you.

     -12-30VDC model for RS-485 communication is standard

     -115-230vac, 50/60Hz power with relay board

     -12-30VDC power with relay board 


Sensor Holder Style: The sensor of the F12 can be mounted in a variety of ways

     -Integral sensor is standard and contains the standard sensor holder integrated into the enclosure of the F12 out the bottom of the enclosure

     -Remote sensor holder with 6 foot cable provides a remote mount sensor in a pre-wired 6'cable, this cable length is fixed and cannot be changed

     -Remote Sensor holder with Junction box allows for a remote mount sensor at a max length of 100 feet.  Standard option includes 100 feet of cable, if shorter cable length is preffered custom lengths can be provided.

     -Duct mount sensor holder provides a duct mount sensor for duct, or pipe mount application and a duct mount adapter.  Also includes 25 feet of cable for remote mounting ability.

     -Heated sensors are optional - please contact us to configure as they are very customizable.

Digital Output:

     -Standard 4-20 mA output is provided with all sensors

     -HART interface is available for all sensors

     -Modbus interface is only available for RS-485 sensors, and 115-230 VAC sensors. 


F12 Features

     -Interchangeable Sensors: Every transmitter will accept up to 45 different sensor modules, greatly reducing the need for multiple transmitter models.

     -Sensor Auto-Test: Gas generators permanently installed on the sensor verify sensor operation by providing a “bump test” of the sensor from daily to once a week.

     -Smart Sensor Modules: Plug-in sensors store calibration data, allowing sensors to be calibrated separately from the transmitter. This allows bench calibration (or factory calibration) of sensors to reduce the necessity for carrying calibration gas around the plant.

     -Alarm & Relay Option: A non-IS version of the transmitter provides 3 integral alarm relays. Relays are programmable for set point, hysteresis, on-delay, off-delay, and other variables. Systems with alarms are available for operation from 12-30 VDC supplies or from 115-230 VAC power.

     -Serial Communication Interface: The IS version of the transmitter is available with HART™ communications. The HART protocol supports the HART Universal and Common Practice Commands at 1200 baud using the Bell 202 FSK modem standard. The non-IS versions of the transmitter are available with MODBUS™ communications. The MODBUS protocol supports 9600 baud access to concentration and status information, and supports alarm setup and many other functions.

     -LCD Graphics Display: Gas Concentrations are displayed in large, easy to read numbers. The display also provides alarm indication and complete menus for setting up operating parameters.

     -Internal Data Logger: Measured gas values are stored at user definable intervals and can be recalled when needed on the LCD display. Data can be downloaded using a HART™ or MODBUS™ interface.

     -Sensor Calibration History: Each time a sensor is zeroed or calibrated, the data is stored in memory. Calibration history can be recalled and sensor condition reviewed by operating personnel whenever necessary.

     -Non-Intrusive Operation: Operating functions such as calibration, alarm setup, alarm reset, data view, and setup options are all available using sealed front panel switches on the face of the Nema 4X transmitter enclosure.

     -Heated Sensor Option: For use in applications where condensation is a problem, this heater option keeps the sensor above the dew point to eliminate loss of sensitivity due to moisture blockage on the sensor face.

     -Output Simulation: Transmitter analog output can be set to user definable values and relay outputs can be set to specific states for complete simulation of detection system operation. Output and alarms may also be inhibited for maintenance and calibration.


Click HERE to add additional gas sensors to your order.


F12 Accessories

Calibration Adapter: The F12 can be calibrated by performing a zero calibration, and then the calibration adapter is required.

Flowcell Assembly: Allows the F12 to measure a sample gas flowing past the sensor. Sealed flowcell assembly is safe to use and provides accurate gas measurement of sample gas. Use in sample stream with a sample pump or sampler (example: A21 Gas Sampler)

Sensor Module Keeper: Can hold up to 4 sensors and keeps them ready for operation so complete sensor changes and sensor warm-up can be made in less than 1 minute.

Duct Sensor Adapter: Allows the sensors to be held in this adapter, and then secured to a duct or pipe. It has a 1 1/2" MNPT connection.

Panel Mount Bracket: Can be used to panel mount the F12. NOTE: this comes with the standard F12.

RAP-1: Alarm panel that offers visual and audible alarms to indicate gas levels that are unsafe.

RAP-2: Alarm panel that offers visual and audible alarms to indicate when Ozone levels are unsafe.


Wireless Monitoring & Data Logging Kit

Use the Wireless Monitoring & Data logging Kit with your fixed mount monitor to connect it to the internet allowing access from anywhere. Receive Instant notifications with free text and email alerts. This is a great addition for your fixed mount gas detector.


Use this kit to connect your Fixed mount gas detector to the internet allowing remote access from anywhere.


F12 Specifications

Sensor Type Electrochemical Cell
Range User adjustable within limits of selected sensor
Response Time Sensor dependent
Accuracy Generally ±10% of value, but limited by available calibration gas accuracy.
Repeatability  ±1% (Electronic)
Linearity  ±0.5% (Electronic)
Zero Drift Less than 2% full scale per month
Span Drift Dependent on operating environment but generally less than 3% per month
Analog Output 4-20 mA, 600 ohms max. at 24 VDC
Power Requirements          (Standard and HART™ Option) Powered from 4-20mA loop, 12-30 VDC, 25 mA max.
(Modbus Option) Requires regulated 10-28 VDC to power RS232/485. May be same supply as 4-20mA loop if not connected to loop receiver.
Alarm Relay Board  Option Powers transmitter, relays, and RS232/485 port; Requires Deep Case Three SPST relays (two with N/O contacts, one with N/C contacts) Each relay: 5A @ 230 VAC resistive; 5A @ 30 VDC resistive Coils are programmable as normally energized or normally de-energized
Additional Power Requirements AC version powered from 115/230 VAC, 1W nominal
DC version powered from 12-30VDC, 1W nominal
Enclosure NEMA 4X, polycarbonate with stainless steel hardware. Weatherproof and corrosion resistant (Standard) HWD: 4.4”(112mm) x 4.4” (112mm) x 3.5” (89mm), (w/Optional ) HWD: 4.9”(124mm) x 4.9” (124mm) x 5.5” (139mm)
Display Graphics LCD, 96w x 32h, backlit, transflective
Controls Four, dome-type push buttons; Remote alarm reset input (w/optional alarm relays only)
Calibration Replace your sensor after the sensor fails - Sensor life is 2 years




F12 Product Spec Sheet

F12D Product Manual

F12 Support Drawings



Links to more info:

Calibration information

ATI Specific Calibration Information



Auto-test Generator

The Auto-test option verifies the serviceability of the transmitter on a prescribed schedule by exposing the sensor to a small amount of gas, and verifying a minimum response. Three attempts per test are made, and if the sensor does not respond on the third attempt, a fault alarm is triggered (may be optionally disabled). 

The test is performed at a specific time of day, and may be scheduled to repeat every 1 to 14 days. The date and time of the next test is available for editing, and the test may be triggered manually at any time, without affecting the preset schedule.

The Auto-test option requires an E18 gas generator, which must be compatible with the installed sensor’s gas type, and full-scale range. Table below lists gas compatible generators and sensors.

Auto-test Generator   Generator Type       
Compatible Sensors    
00-1538 Chlorine (Cl2)                    
Bromine (Br2)

Chlorine (Cl2)

    Chlorine Dioxide (ClO2)
    Flourine (F2)
    Ozone (O3)
    Hydrogen Flouride (HF)
    Nitrogen Dioxide (NO2)
    Iodoine (I2)
    Acid Gas
00-1539 Ammonia (NH3) Ammonia (NH3)
    Dimethylamine (DMA)
00-1540 Carbon Monoxide (CO) Carbon Monoxide (CO)
00-1541 Hydrogen Sulfide (H2S) Hydrogen Sulfide (H2S)
    Hydrogen Chloride (HCl)
00-1542 Sulfer Dioxide (SO2) Sulfer Dioxide (SO2)
    Hydrogen Cyanide (HCN)



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 F12 accessories.

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 Yes
Relays 2 Relays
Field Replaceable Sensor Yes
Auto Test Generator None
Min, Max, Avg No
Voltage Output None
Power Requirements 12-30 VDC, 120 VAC or 220 VAC 50/60 hz. please specify desired voltage when ordering
Datalogging No
Rechargeable No
Field Replaceable Battery Yes
Warranty 1 Year
Sensor Range 0-1,000 ppb, 0-2 ppm, 0-20 ppm, 0-1,000 ppm
Resolution Range Dependent
Audible Alarm No
Sensor Life 2 Years
Calibration Replace Sensor After Failure
Sensor Features Field Replaceable Sensor, 4-20 mA Output, 3 Integrated Relays, Optional Auto-Test Generator, Digital Communications
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