SPM Flex by Honeywell Analytics - Single Point Chemcassette Tape-Based Gas Detector

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Gas Monitor Manufacturer: Honeywell Analytics
SPM Flex by Honeywell Analytics - Single Point Chemcassette Tape-Based Gas Detector
SPM Flex by Honeywell Analytics - Single Point Chemcassette Tape-Based Gas Detector
SPM Flex by Honeywell Analytics - Single Point Chemcassette Tape-Based Gas Detector

The Honeywell SPM Flex is a portable, tape-based gas detector designed for emergency response and toxic gas monitoring using ChemCassette® technology, enabling detection of hydrides, mineral acids, oxidizers, amines, phosgene, diisocyanates, hydrazines, hydrogen cyanide, sulfur dioxide, ozone, and hydrogen peroxide. Simply swap the ChemCassette and select the target gas from the LCD menu to switch between chemicals, with the unit operational within two minutes. It features a sample range of up to 100 feet, datalogging up to three months plus a one-year event history, and Ethernet connectivity with Modbus TCP/IP for remote web-browser monitoring. Note: this unit is configured for use at elevations from sea level to 1,500 feet, flow faults may occur at higher elevations. ChemCassettes are not included and must be purchased separately.

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$315.00
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$945.00
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What is the Honeywell SPM Flex used for?
The SPM Flex is a portable, tape-based toxic gas detector used for emergency response and toxic gas monitoring when electrochemical sensors are not sensitive enough or not selective enough. It uses Chemcassette® tape so you can detect specific families of chemicals by swapping the cassette and selecting the gas on the menu. It's a practical tool when the friction is "we need ppb-level confidence, not a vague oxidizer alarm."
How does Chemcassette® tape detection work?
The instrument pulls air across a reactive tape that changes in response to a target chemical, then the detector optically reads the reaction and alarms. The key operational point is that your "sensor" is the cassette/tape chemistry, not a fixed electrochemical cell. If you change the Chemcassette to a different target, you change what the instrument can detect.
What's the fastest way to choose the right Chemcassette for my job?
Start with the hazard and the decision you need to make. Identify the target gas family (hydrides, mineral acids, oxidizers, amines, etc.), then confirm the exact cassette match and reporting needs. The SPM Flex is only as accurate as the cassette selection. If you're unsure, don't guess—confirm cassette availability and compatibility before you mobilize.
When should I use SPM Flex instead of a standard 4-gas monitor?
Use a 4-gas monitor for worker protection hazards like O2/LEL/CO/H2S. Use SPM Flex when you need ultra-sensitive detection of specific toxics that fall outside standard 4-gas coverage or require lower detection levels. It's a different category: targeted toxic detection rather than broad confined-space screening.
SPM Flex vs an electrochemical single-gas detector — what's the difference?
Electrochemical detectors are common for many toxics, but they can have cross-sensitivities and may not reach the sensitivity needed for certain compounds. SPM Flex relies on cassette chemistry, so the "sensor" is purpose-matched to a target gas family. Choose SPM Flex when selectivity and sensitivity are the primary constraints.
SPM Flex vs Dräger tubes — which is better for my use case?
Tubes are manual, snapshot measurements and require consistent technique to be comparable. SPM Flex provides continuous monitoring with alarms, which is valuable when conditions change quickly or when you need unattended monitoring. If you need continuous warning and a record of conditions, continuous monitoring is usually the better workflow.
What do I need to know about changing target gases on the SPM Flex?
Changing target gases is a cassette change plus a configuration change on the device. The key risk is mismatch—running the wrong cassette for the hazard. Standardize cassettes per site, label them clearly, and document which cassette was installed during each monitoring period.
What should I confirm before deploying SPM Flex on a response scene?
Confirm your target chemical(s), the correct cassette for each, your monitoring location(s), and your alarm/response plan. Tape-based monitoring is powerful, but it doesn't replace a hazard assessment. Decide upfront what a positive detection means operationally (evacuate, ventilate, isolate, PPE escalation) and who has authority to act.
What's included in an SPM Flex rental?
The product record does not list a standard kit contents field for this item. In practical terms, you need the SPM Flex unit plus the correct Chemcassette(s) for your target gas. Confirm exactly which cassette is included and how many are needed for your run time and scope.
Why are my results inconsistent between locations?
Placement and airflow are common causes. Reactive gas plumes can be highly localized, especially near release points or ventilation exhausts. Use consistent placement and document the environment (doors, fans, process state). If you're comparing areas, keep monitoring time and placement consistent.

Exposure Hazards This Equipment Detects

Ammonia (NH₃)

CAS: 7664-41-7
Learn More
Updated on April 10, 2026
PEL TWA
50 ppm (35 mg/m³)
REL TWA
25 ppm (18 mg/m³)
TLV TWA
25 ppm (17 mg/m³)

Chlorine Gas (Cl₂)

CAS: 7782-50-5
Learn More
Updated on March 17, 2026
PEL TWA
1 ppm (3 mg/m³) [Construction and Maritime Industries only]
REL TWA
N/A
TLV TWA
0.1 ppm (0.29 mg/m³)

Ozone (O₃)

CAS: 10028-15-6
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Updated on March 09, 2026
PEL TWA
0.1 ppm (0.2 mg/m³)
REL TWA
N/A
TLV TWA
Heavy work: 0.05 ppm (0.10 mg/m³); Moderate work: 0.08 ppm (0.16 mg/m³); Light work: 0.10 ppm (0.20 mg/m³) [1995]

Sulfur Dioxide (SO₂)

CAS: 7446-09-5
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Updated on March 09, 2026
PEL TWA
5 ppm (13 mg/m³)
REL TWA
2 ppm (5 mg/m³)
TLV TWA
N/A

Hydrogen Peroxide (H₂O₂)

CAS: 7722-84-1
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Updated on March 09, 2026
PEL TWA
1 ppm (1.4 mg/m³)
REL TWA
1 ppm (1.4 mg/m³)
TLV TWA
1 ppm [1990]

Hydrogen Cyanide (HCN)

CAS: 74-90-8
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Updated on March 09, 2026
PEL TWA
10 ppm (11 mg/m³) [skin]
REL TWA
N/A
TLV TWA
N/A

Nitrogen Dioxide (NO₂)

CAS: 10102-44-0
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Updated on March 17, 2026
PEL TWA
N/A
REL TWA
N/A
TLV TWA
0.2 ppm (0.38 mg/m³)

Hydrogen Sulfide (H₂S)

CAS: 7783-06-4
Learn More
Updated on March 17, 2026
PEL TWA
N/A
REL TWA
N/A
TLV TWA
1 ppm [2009]

Phosgene (COCl₂)

CAS: 75-44-5
Learn More
Updated on March 09, 2026
PEL TWA
0.1 ppm (0.4 mg/m³)
REL TWA
0.1 ppm (0.4 mg/m³)
TLV TWA
N/A

Hydrogen Chloride (HCl)

CAS: 7647-01-0
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Updated on May 21, 2026
PEL TWA
N/A
REL TWA
N/A
TLV TWA
N/A

Chlorine Dioxide (ClO₂)

CAS: 10049-04-4
Learn More
Updated on April 29, 2026
PEL TWA
0.1 ppm (0.3 mg/m³)
REL TWA
0.1 ppm (0.3 mg/m³)
TLV TWA
0.1 ppm (0.28 mg/m³)

Hydrogen Fluoride (HF)

CAS: 7664-39-3
Learn More
Updated on May 21, 2026
PEL TWA
3 ppm (2 mg/m³)
REL TWA
3 ppm (2 mg/m³)
TLV TWA
0.5 ppm

Features & Capabilities

Datalogging: ✓ Yes

Equipment Specifications

  • Configured for use at elevations from sea level to 1500 feet.  You will likely experience flow faults if using the SPM Flex at elevations above 1500 feet.
  • Portable or field-mountable unit with sample range up to 100 feet
  • Chemcassette tape-based gas detection for hydrides, mineral acids, oxidizers, amines, phosgene, diisocyanates, hydrazines, hydrogen cyanide, sulphur dioxide, ozone, and hydrogen peroxide
  • LEDs for alarm, normal condition, and fault plus audible alarms
  • Color LCD display with large four-button interface
  • Datalogging up to three months plus one-year event history
  • Outputs: Relays for Alarm 1, Alarm 2, fault; 4-20 mA; Ethernet with Modbus TCP/IP and web server; USB for memory stick configuration and data transfer

Kit Contents

Honeywell SPM Flex, AC Power Brick/Cable, Optics Test Card, Filter Holder with White Adapter and Spare Filters, Coiled Tubing, Probe Grip / Wand, End of Line Particulate Filter, Corrosive Filter with Tubing Adapter, Shoulder Strap, Flash Drive with Manuals/Guides

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