TSI 985 High Concentration (PPM) VOC and Temperature
TSI 985 High Concentration (PPM) VOC and Temperature
Note: This item is past due annual calibration. Contact us for more details.
The TSI 985 is a high-concentration VOC and temperature probe compatible with TSI VelociCalc and Q-Trak portable digital meters. It measures volatile organic compounds from 1–2,000 ppm (up to 10 ppm resolution) and temperature from 14–140°F / -10–60°C (0.1°F/°C resolution, ±1.0°F accuracy). This gently used probe was purchased in 2012 and was last calibrated 6/3/2019; it is available for purchase only.
Choose Your Option
Rent for flexible short-term use or purchase to own
What is the TSI 985 high concentration VOC and temperature probe used for?
The TSI 985 probe is used to measure higher-concentration VOC levels (ppm) along with temperature when connected to compatible TSI handheld meters. It’s designed for field screening where you need trend data you can document—identifying “where the VOCs are highest” and “when conditions change” during remediation, ventilation changes, or process troubleshooting.
What instruments is the TSI 985 probe compatible with?
The product description states it’s compatible with TSI VelociCalc and TSI Q-Trak portable digital meters. Confirm your meter model before you plan field work, because the probe is not a standalone meter.
Does the probe identify the exact VOC compound?
No. A VOC probe typically reports a VOC response signal rather than speciating compounds. Use it for screening and trending. If you need compound-specific identification for compliance or risk assessment, pair screening with lab sampling or compound-specific instrumentation.
When should I use a higher-concentration VOC probe instead of a lower-range PID?
Use a high-concentration probe when you expect elevated ppm levels and you want stable readings in that range. Lower-range tools are better when you need trace detection. Start with the decision: “Do I need to find hotspots at higher ppm?” or “Do I need low-level exposure screening?” Then choose accordingly.
VOC probe vs a handheld PID — what’s the difference?
A handheld PID is a self-contained instrument built for VOC screening and field mobility. This TSI 985 is a probe that requires a compatible TSI meter platform. The advantage of a probe-based system is integration with the meter’s workflow and potential multi-parameter measurement depending on the meter model. The disadvantage is you must have the compatible base unit.
What should I confirm before using this probe on a remediation or vapor intrusion job?
Confirm your measurement objective (hotspot finding vs documentation), your meter compatibility, and how you will record results (locations, times, and conditions). VOC readings can change rapidly with ventilation, temperature, and work activity. Without consistent documentation, comparisons don’t hold up.
Why might VOC readings change as temperature changes?
Temperature can affect VOC volatilization and room mixing. If the process heats up surfaces or increases evaporation, readings can rise. Pairing VOC and temperature helps you explain whether changes are driven by process conditions or by ventilation/containment changes.
What’s a common mistake when using VOC screening data for decisions?
Treating screening as compliance. Screening helps you decide where to sample and whether controls are working. Compliance decisions usually require method-specific sampling and documentation. If your client expects a defensible exposure number, confirm the method and use appropriate sampling.
Why do two readings in the same room sometimes disagree?
VOC distribution is rarely uniform. Airflow, pressure differences, and proximity to sources create gradients. Use consistent sampling height, consistent dwell time at each point, and the same route pattern each time to make comparisons meaningful.
How can I use VOC screening to verify ventilation or containment improvements?
Take baseline readings before changes, then repeat the same points after changes with the same sampling technique. Document what changed (fan speed, containment adjustments, door status). The value is the trend and the reduction pattern, not a single absolute number.
Exposure Hazards This Equipment Detects
Volatile Organic Compounds (VOCs)
CAS:
N/A
Learn More
Updated on March 09, 2026
PEL TWA
N/A
REL TWA
N/A
TLV TWA
N/A
Kit Contents
Manufacturer Resources
Documents
Manufacturer documentation is available upon request. Please contact our team for manuals, safety guides, and technical specifications.
Videos
No manufacturer videos are currently available for this product. Check back later or contact us for more information.
Ask a Question
Have a question about this product? Fill out the form below and our team will get back to you shortly.
- Translation missing: en.general.accessibility.refresh_page
- Translation missing: en.general.accessibility.new_window
Rental Dates Notice