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Improve safety and productivity with the most flexible, user friendly tape based gas detector for low level toxics, the SPM Flex Isocyanate Detector by Honeywell Analytics. The SPM Flex, the next evolution of the SPM & TLD gas detectors with Chemcassette tape technology, is capable of working as both a fixed and a portable unit. The monitor detects the ultrasensitive gases inherent in your operations, including:

  • Isocyanates
  • Hydrides
  • Oxidizers
  • Mineral acids
  • Amines

The SPM Flex is a highly automated single point monitor that is intuitive, easy to use and designed to the unique needs of your operation.

  • The Honeywell SPM Flex is easy to choose the target gas, just turn the Flex on, snap in the proper Chemcassette tape and use the intuitive LCD menu to select the gas from the list. Need to monitor for a gas in a different family? Just swap out the Chemcassette tape and choose the new gas. No ChemKeys required.
  • The SPM Flex has a quick start up for emergency response. It is running in under 2 minutes – so your response team can quickly gear up and go to the site.
  • The SPM Flex is easy to use with protective equipment or hazmat gear. Purpose built with the user experience in mind, the SPM Flex is easy to carry operate and read – even when you are wearing a hazmat suit or other protective gear. The monitor has large, chunky buttons that are easy to use. And when you carry the SPM Flex, the display faces up so it’s easy to read.
  • The SPM Flex is capable of working as both a fixed and a portable unit, an important addition to your toxic gas monitoring system. Use it to investigate suspected leaks, or, if you have a monitoring point that is out of service, use the SPM Flex to replace it – with the option to plug it in or use the long lasting battery.
  • The SPM Flex is visible at a distance. Thanks to a crisp display and a color coded LED bar on top of the SPM Flex, you can see alarm status, gas concentration and other data easily from a distance. So even if you are not right next to your SPM Flex, you always know the health of your unit and the safety of your area.
  • The SPM Flex offers remote viewing through the web. Your visibility even extends to other rooms and buildings, thanks to the unit’s web capabilities. Simply plug an Ethernet cable into the SPM Flex, and use the easy to read web interface to see the status of the unit – no matter where you are.
  • The SPM Flex stands up to harsh conditions. Working in the sun and rain, around blasts of steam, or other challenging environmental conditions? The SPM Flex goes where you do, standing up to changes in temperature and humidity without compromising accuracy. It also works well in cleanrooms, thanks to its Teflon coating that does not attract dust. And if it is every exposed to toxic gas or caustic liquid, just hose it down or use a decontamination wipe.
  • With the SPM Flex, you can rest assured that every monitoring moment is being recorded – and ready for analysis whenever you need it. Whether you want to report a gas incident or investigate a trend, the monitor keeps up to a three month history of gas concentrations, alarms, tape changes and other factors. Plus, you have the option to view this data through a web server, or you can easily download it to a USB drive.
  • Need to change the detection limit for a gas? Alter the parameters for latching alarms? Just adjust your settings with the intuitive menu – then use the USB port to download and transfer them to other units. So it is a snap to deploy multiple monitors with a consistent configuration.
  • The SPM Flex has easily serviceable parts and a reliable battery, so you can count on long-lasting portable use – and an affordable cost of ownership. Even more, if the SPM Flex is plugged in and you lose power, the internal battery kicks in as backup so the unit keeps monitoring.


Detection Technique Chemcassette tape based with advanced self monitoring optics design
Alarm Point Chemcassette dependent
Battery Type Lithium ion
Battery Life 6+ hours, approximately 70% of its original capacity after 300 full charge/discharge cycles
Flow System Automatic flow control with bypass system, 250 or 500 cc/min at tape, higher flow at inlet to reduce sample time (internal bypass system); sample up to 100 feet
Local Alarms/Status Visual: LEDs for alarm, normal condition and fault
Audible: User selectable: Off, Low – 75 dB at 1M, Medium – 85 dB at 1 M, High > 90 dB at 1M
Interface 4 large buttons, 3.5″, color LCD TFT display, web server
Data Logging Rolling up to 3 months (15 second with no gas reading, 1 second when reading gas), event history (1,500 events – about 1 year)
Maximum Inlet/Outlet Pressure Differential Overall maximum load on the pump between the inlet and the exhaust should not exceed 10″ H2O
Relays 250 V, 6a maximum
Wire Gauges Minimum: 24; Maximum: 14
USB 2.0 or later
Indoor/Outdoor Use Both, power supply is indoor only
Operating Altitudes -1,000 to 3,000 feet above sea level: standard; 3,000 feet to 6,000 feet above sea level, requires adjustment by Honeywell
Ingress Protection IP-65
External Switch or Circuit Breaker Requirement Meet or exceed all local codes and regulations
Ventilation Requirements Mount with no obstructions within 4″ of either side or within 2″ above and below the detector
Power Supply Universal line powered (90-260 VAC 50/60 Hz) for battery charger & non-classified use. Battery: 6+ hours under typical conditions – acts as battery back up in fixed applications
Power Consumption About 1.9 at 2.4 VDC (including battery charging current)
Communications Relays: Alarm 1, Alarm 2, Fault (user configurable for normally open/closed) 4-20 mA
Ethernet with Modbus TCP/IP and web server
USB port for memory stick configuration/data transfer
Communications connector and optional communications cable: 60 V, 5 A maximum
Temperature 0 to 40°C for most gases
Humidity 0-100% RH for unit, sample RH limited per tape/calibration. Sample line requires additional hardware to remove moisture in high RH conditions where condensing may occur. The sample must be non-condensing. Dry conditions may require humidification
Mounting Screws Concrete: 5/16″ x 2″ vibration resistant stud anchor for concrete, add .25″ to length when mounting bracket with sun shield
Wood: 5/16″ x 2″ flange head lag screw for wood, add .25″ to length when mounting bracket with sun shield
Dimensions 13.2″ x 7.2″ x 6.4″
Weight 9.1 pounds
Certifications UL: 61010-1, 3rd edition, 2012-05
CAN/CSA: C22.2 No 61010-1, 3rd edition, 2012-05
IEC: 61010-1: 2010, 3rd edition
FCC approval for RFID board + Canadian & European


The Chemcassette is the colorimetric based sensor used by your SPM Flex gas monitoring systems to detect and measure toxic gases. It consists of a special substrate that been coated with proprietary chemical formulations that produce a color reaction in dry form when exposed to a specific gas or family of gases. Chemcassettes are extremely sensitive and specific to the gas or gases they are designed to detect. As a result, they are a fast, accurate, virtually interference free detection method.

Each step of the Chemcassette production process is carefully controlled to assure that the Chemcassette will perform as intended in your Flex gas detector. Each and every Chemcassette batch is dynamically tested according to NIOSH methodologies with a gas it is designed to detect and the results are carefully documented. Our ISO 9001 quality control standards are strict enough to meet rigorous US Nuclear Regulatory Commission audit requirements. Each step in the manufacturing and testing process is fully documented and traceable to NIST standards through the serial number assigned to each Chemcassette.

Chemcassette Specifications

14 Day Cassettes
Part No.
30/90 Day Cassette
Part No.
Arsine 0.5-500 ppb 2.5/5 ppm 1265-4000 1265-3000
Phosphine 3-3,000 ppb 150/300 ppb 1265-4000 1265-3000
Diborane 5-1,000 ppb 50/100 ppb 1265-4000 1265-3000
Silane 0.03-50 ppm 2.5 ppm/5 ppb 1265-4000 1265-3000
Germane 50-2,000 ppb 100/200 ppb 1265-4000 1265-3000
Hydrogen Selenide 2-500 ppb 25/50 ppb 1265-4000 1265-3000
Hydrogen Sulfide 0.001-9.999 ppm 0.5/1 ppm 1265-4000 1265-3000
Mineral Acids
Hydrogen Fluoride 0.02-20 ppm 1/2 ppm 1265-4001 1265-3001
Hydrogen Chloride 0.02-20 ppm 1/2 ppm 1265-4001 1265-3001
Hydrogen Bromide 0.02-10 ppm 1/2 ppm 1265-4001 1265-3001
Boron Trifluoride 0.05-10 ppm 0.5/1.0 ppm 1265-4001 1265-3001
Mineral Acids – Export Unrestricted
Hydrogen Fluoride 0.4-20 ppm 1/2 ppm 1265-4012 1265-3012
Hydrogen Chloride 0.02-20 ppm 1/2 ppm 1265-4012 1265-3012
Hydrogen Bromide 0.02-10 ppm 1/2 ppm 1265-4012 1265-3012
Boron Trifluoride 0.05-10 ppm 0.5/1.0 ppm 1265-4012 1265-3012
Chlorine 0.005-5 ppm 0.25/.5 ppm 1265-4002 1265-3002
Chlorine 0.01-5 ppm 0.25-0.5 ppm 1265-4004 1265-3004*
Fluorine 0.01-10 ppm 0.5/1.0 ppm 1265-4004 1265-3004*
Nitrogen Dioxide 0.03-10 ppm 0.1/0.2 ppm 1265-4004 1265-3004*
Chlorine Dioxide 20-1,000 ppm 50/100 ppb 1265-4004 1265-3004*
Ammonia 0.01-150 ppm 12.5/25 ppm 1265-4003 1265-3003
Dimethylamine 0.5-50 ppm 2.5/5 ppm 1265-4003 1265-3003
Tetrakis, Dimethylamido Tritanium 0.01-20 ppm 1/2 ppm 1265-4003 1265-3003
Trimethylamine 0.3-50 ppm 2.5/5 ppm 1265-4003 1265-3003
Toluene Diisocyanate (TDI) 0.5-200 ppb 1/2 ppb 1265-4006 1265-3006*
Methylene Disphenyl Isocyanate (MDI) 0.5-200 ppb 2.5/5 ppb 1265-4006 1265-3006*
Hexamethylene Diisocyanate (HDI) 0.5-150 ppb 2.5/5 ppb 1265-4006 1265-3006*
Hydrogenated Xylene Diisocyanate (H6XDI) 0.5-150 ppb 2.5/5 ppb  1265-4006 1265-3006*
Methylene bis-(4-cyclohexylisocyanate)(HMDI) 0.5-100 ppb 2.5/5 ppb 1265-4006  1265-3006*
Isophorone Diisocyanate (IPDI) 0.5-150 ppb 2.5/5 ppb 1265-4006 1265-3006*
Xylene Diisocyanate (XDI) 0.5-200 ppb  2.5/5 ppb 1265-4006  1265-3006*
Hydrazine 3-1,000 ppb 5/10 ppb 1265-4008 1265-3008
Monomethyl Hydrazine 3-2,000 ppb 5/10 ppb 1265-4008 1265-3008
Dimethyl Hydrazine 3-2,000 ppb 5/10 ppb 1265-4008 1265-3008
Phosgene 0-2,000 ppb
50/100 ppb
1265-4007 1265-3007
Hydrogen Cyanide 0.2-30 ppm 2.4/4.7 ppm 1265-4009
Sulfur Dioxide 10-2,500 ppb 120/250 ppb 1265-4005 1265-3005*
Ozone 20-1,000 ppb 50/100 ppb 1265-4011 1264-3011
Hydrogen Peroxide 0.1-3 ppm 0.5/1.0 ppm 1265-4010 1265-3010

*30 day cassette

Ordering Information

The SPM Flex Isocyanate Detector, the next evolution of the SPM & TLD gas detectors with ChemCassette tape technology, is capable or working as both a fixed and a portable unit. the monitor detects the ultrasensitive gases inherent in your operations, including hydrides, mineral acids, amines and isocyanates. For pricing, please call AFC International at 1-800-952-3293, 219-987-6825 or fax 219-987-6826 or email

Kit Instrument Part No.
SPM Flex Isocyanate Detector Fixed includes wall mounting bracket, battery, power supply, power cord, CD and quick start guide SPMF-F1US
SPM Flex Isocyanate Detector Portable includes handle assembly, shoulder strap, battery, power cord, CD and quick start guide SPMF-P1US

Accessory Ordering Information

Part No.
Sample Wand Kit includes probe, filter/holder, coiled tube, mounting hardware SPMF-WAND
Shoulder Strap SPMF-STRP
Handle for Portable Configuration SPMF-HNDL
Weather Shield for use in fixed configuration, includes mounting hardware SPMF-WTHR
6′ Power Cable with Weather Proof Connector for connection to user 24 VDC SPMF-PCON
10′ Ethernet Cable with Weather Proof Connector, standard male SPMF-PCON
Communication SPM Flex Side Connector, 6′ Communication Cable with Weather Proof Connector and Pit Tale SPMF-CCON
SPM Flex Optics Test Card 1265-2014
Union Fitting, use to connect disposable end of line filter to tubing 0235-0095
¼” od x 1/8″ FEP tubing for sample inlet, priced per foot 102599
¼” od x 3/15″ id Polypropylene tubing for exhaust, priced per foot 10040
Standard Mounting Bracket for Fixed SPM Flex SPFM-MBST
Retro-Fit Mounting Bracket for Fixed SPM Flex, compatible with original SPM SPMF-MBRF
Corrosive End of Line Filter 1991-0147
Standard End of Line Filter 780248
Small Acid Scrubber/Filter 871134
Standard Size Acid Scrubber/Filter 710235


SPM Flex Isocyanate Detector Brochure

SPM Flex Detectable Gases

Quick Start Guide

Spec Sheet

User Manual


Product Enquiry

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