Qualitative Fit Test Timer | IEH
IEH Occupational Hygiene Tool

Qualitative Respirator Fit Test Timer

A practical timer for conducting qualitative respirator fit testing exercises, including the 5-minute respirator wear period, 60-second test exercises, squeeze reminders and simple progress tracking.

Use the Fit Test Timer Need Respiratory Protection Support?
Fit test operator conducting a qualitative respirator fit test with a worker wearing a fit test hood.
About this tool

Use this timer to support the sequence and timing of qualitative fit test exercises.

Qualitative fit testing requires a structured sequence of exercises and regular challenge agent delivery. This tool helps the fit test operator keep time, prompt squeeze intervals and remind the test subject to breathe through the mouth and report taste detection immediately.

Qualitative respirator fit test workflow showing respirator selection and donning, user seal check, sensitivity screening, five-minute wear period, fit test exercises, and recordkeeping.
01

Start respirator wear time

Use the 5-minute wear timer before starting the fit test sequence, where this is required by your selected qualitative fit test protocol.

02

Run exercise sequence

The timer runs seven 60-second exercises: normal breathing, deep breathing, turning head side to side, moving head up and down, talking, bending over and final normal breathing.

03

Prompt squeeze reminders

Select 5, 10 or 15 squeezes per interval. The tool prompts squeeze reminders during the exercise sequence without changing your existing workflow.

Seven qualitative respirator fit test exercises performed for 60 seconds each.
Important: This tool supports timing only. It does not replace a validated qualitative fit test protocol, competent fit test operator, correct sensitivity screening, appropriate test agent, suitable respirator selection or proper recordkeeping.

Fit Test Timer

Select the squeeze count, complete the respirator wear period if required, then start the qualitative fit test exercise sequence.

Fit Test Controls

Respirator Wear Time: 05:00
Squeezes: 10
Nebuliser squeeze schedule showing initial and replenishing doses for qualitative respirator fit testing.
Select squeeze count and press Start
00:00
Squeeze Now!

Operator Reminders

1 Always instruct the test subject to breathe through the mouth during the qualitative fit test.
2 The test subject should raise a hand immediately if the bitter or sweet solution is detected.
3 Do not proceed if the respirator is incorrectly worn, incompatible with the user, or cannot achieve an adequate seal.
4 Record the respirator model, size, test agent, operator, test subject and fit test outcome according to your programme requirements.
Fit test operator reminders including mouth breathing, taste detection, respirator seal and recordkeeping.
Qualitative fit test timer Seven 60-second exercises 5, 10 or 15 squeeze intervals
How to use the timer

The tool supports timing, but the fit test operator remains responsible for the protocol.

The timer follows the same functional sequence as the original tool: select squeeze count, optionally run the 5-minute respirator wear timer, start the fit test, receive squeeze prompts, and complete the exercise sequence.

Before starting

  • Confirm the wearer has donned the respirator correctly.
  • Complete user seal checks according to the respirator manufacturer’s instructions.
  • Confirm the correct test agent and sensitivity screening requirements.
  • Select the number of squeezes per interval based on your selected protocol.

During the test

  • Keep the hood and nebuliser arrangement consistent with the selected test method.
  • Ensure the wearer follows each exercise as displayed by the timer.
  • Deliver additional challenge agent when prompted by the squeeze reminder.
  • Stop the test if the wearer detects the test agent or if the test conditions are invalid.
Professional limitations

A timer does not determine whether a respirator fits.

Proper fit testing depends on the correct test method, competent operator, appropriate respirator, user instructions, sensitivity screening, challenge agent concentration and valid test conditions.

Not a fit test record

This page does not create or store formal fit test records. Results should be documented separately according to your respiratory protection programme.

Not a substitute for training

Operators should be trained in the selected fit test protocol, respirator limitations and correct pass/fail criteria.

Not suitable for all respirators

Qualitative fit testing has specific applicability limits. Use quantitative fit testing where the respirator type, protection factor or programme requirement makes it necessary.

Respiratory protection programme elements including exposure assessment, respirator selection, medical suitability, fit testing, training, maintenance and storage, and programme review.

Need help with respirator fit testing or respiratory protection programmes?

IEH can support qualitative and quantitative respirator fit testing, respiratory protection programme review, worker training and occupational hygiene exposure assessment.

View Occupational Hygiene Services Contact IEH