Measuring Value Before and After a Mosquito Sprayer Purchase: Indicators Leaders Can Actually Report

Once a local government has bought a mosquito sprayer, the question that usually follows in the council chamber is simple: "What did we get for it?" Answering "it works well" is no longer enough. This article sets out a practical before-and-after approach. You record a baseline before the machine arrives, then compare it with the same measures after it goes into service, using indicators drawn from routine work rather than invented figures. Our example is the SUPER ROTARY backpack ULV sprayer, a compact, field-durable and cost-effective machine for both public health and agricultural work.

Executive summary (1-minute read)

• The problem: Many agencies buy mosquito equipment and can only report "completed", because no baseline was recorded, so improvement cannot be shown.
• The principle: Measure what the equipment directly influences, such as response speed, coverage, equipment availability and staff workload, rather than claiming the machine alone reduced case numbers.
• How to do it: Record a baseline for one season before the machine arrives, or reconstruct it from old records, then track the same indicators afterwards.
• Example equipment: The SUPER ROTARY is a backpack ULV rotary sprayer that produces a fine mist, is compact and durable in the field, and serves both public health and agriculture.
• Next step: Call 065-556-6294 or LINE @whd268 for a quotation and specifications, request a demonstration, and budget for the equipment together with an indicator plan.

An illustrative scenario: the council question the chief administrator could not answer

(Illustrative scenario. It does not describe any real person or agency.)

Chief administrator Sunthorn runs a subdistrict administrative organization whose villages are scattered among rice fields and fruit orchards. The previous year, after dengue cases appeared in several villages, the council approved a budget for a backpack sprayer. The health team used it throughout the rainy season, and residents saw staff working hard.

During the next budget debate, one council member asked: "We bought a machine last year. What results did it deliver? If you want more money, show us the data." Sunthorn could say the machine was used often and the team worked hard. But he had no comparison. He did not know how many days it used to take to spray around a patient's home before the machine arrived, how many villages the team could cover in one round, or how complaints had changed.

The machine was not the problem. The problem was that nobody had recorded the "before" picture. Without a starting point, real success became a matter of opinion, and the next budget request became harder.

After the meeting, Sunthorn asked his public health officer to set up a simple system. Every spraying trip would get a short log entry, and the team would reconstruct as much baseline data as possible from old notebooks. This article describes that same approach so any agency can use it right away.

Why leaders need a systematic way to measure value

Health

Aedes mosquitoes transmit dengue, chikungunya and Zika. Dengue brings high fever, headache and muscle pain, and some patients develop severe illness, especially children, older adults and people with chronic conditions. Measurement shows how quickly and how widely local disease control actually reaches these vulnerable groups.

Budget

Councils and auditors want to see that money produced benefits. Before-and-after data makes it easier to justify maintenance, chemicals or additional equipment.

Image and trust

Citizens trust results they can understand. "This year the team reached patients' homes faster and covered every village in the plan" carries far more weight than "we did our best".

Complaints and social media

Data lets you answer complaints immediately. When someone asks in a village chat group why their area has not been sprayed, staff can point to the schedule and the actual log.

Staff workload

Team indicators show whether the equipment really reduces fatigue, and where more people or tools are needed.

Why the usual way of measuring does not work

• No baseline: Conditions before the machine were never recorded, so there is nothing to compare against.
• Only counting cases: Case numbers depend on many factors, including rainfall, population movement and virus strains. Used alone, a wet year can make the machine look ineffective even when the team performed much better.
• Inconsistent records: Some trips are logged and others are not, so the data cannot be trusted.
• Overcomplicated forms: Staff have no time to fill them in, so they stop.
• Not separating the machine's role from other measures: Spraying is supplementary and must go with source reduction, so reports should show both.
• Old machines that break too often: If the previous unit was out of action for half the season, the data simply stops.

Four principles before you start measuring

1. Measure what the tool directly affects, such as speed, coverage, availability and workload, then look at health outcomes as supporting context.
2. Use the same indicators before and after, with identical definitions. For example, "response time" always runs from the date of notification to the date of the first spraying.
3. Collect data from routine work, using spraying logs, complaint registers and asset records you already keep, so no extra burden is added.
4. Report honestly. Show what improved and what still needs work. Never claim that a machine made a disease disappear, because it reduces risk rather than curing illness.

Indicators leaders can actually report

Group A: operations

• Response time: Days or hours from receiving a case report to the team's first spraying around the patient's home within roughly 100 meters.
• Completion of repeat rounds: Whether the team completed the repeat rounds it planned for each event.
• Coverage: Villages or communities sprayed under the pre-season prevention plan, compared with the total in the plan.
• Hard-to-reach access: Places vehicles cannot reach, such as narrow lanes, orchard rows and paddy embankments, that the team actually sprayed.
• Timing: The share of rounds carried out in the early morning or evening, as guidance recommends.

Group B: equipment readiness

• Days available: Days in the outbreak season when the machine was ready, compared with days broken or awaiting repair.
• Borrowing: How often the team had to borrow equipment from other agencies before and after the purchase.
• Repair time: How long it took to get the machine back in service, and whether after-sales service met what was agreed.
• Scheduled maintenance: Whether maintenance followed the manual.

Group C: citizens and trust

• Number and type of mosquito complaints: Separate complaints about mosquito nuisance, about areas not sprayed and about advance notice.
• Feedback from community leaders and village health volunteers: A short survey once or twice a year.
• Advance notice: The share of spraying rounds announced to residents beforehand.

Group D: health and entomology (supporting, not stand-alone)

• Aedes larval indices: The house index (HI, the share of surveyed houses with larvae) and container index (CI, the share of containers with larvae) that teams already survey, showing whether source reduction is keeping pace with spraying.
• Local case trends: Data from health authorities, used for the overall picture and always reported alongside other contributing factors.
• New cases in areas already sprayed: Used to review the quality of spraying and repeat rounds.

Group E: budget

• Emergency repair and borrowing costs: Compared before and after.
• Outbreak overtime: Watch the trend. There is no need to turn it into a per-person figure.
• Chemical use per round: Check that use fits the area. Fine droplets help chemicals work efficiently.

Group F: staff

• Number of staff and volunteers trained on the equipment.
• Operator feedback on fatigue and ease of use.
• Safety incidents during operations, such as chemical exposure or accidents.

Before-and-after record sheet (forward this to your team)

The sheet deliberately leaves blanks for your real data instead of sample numbers, because every area is different and real data is exactly what councils and auditors want to see.

The solution: SUPER ROTARY, a tool that actually moves the indicators

Measurement only means something when the equipment genuinely helps the team work better. The SUPER ROTARY is a backpack ULV cold fogger. ULV stands for Ultra Low Volume, meaning a small amount of chemical released as very fine droplets. Its rotary nozzle is a spinning head that breaks the liquid into a fine mist. According to WHD's product information, its strengths are:

• A compact backpack design that moves easily.
• A fine mist output.
• Durability in field conditions.
• Use in both public health and agriculture.
• Cost-effectiveness.
• Supply by WHD, which holds ISO and GMP certification, runs 100% quality control before delivery, provides after-sales service with technicians and spare parts, and supplies equipment that meets Thai government equipment standards.

How SUPER ROTARY links to the indicators

• Response time: A backpack unit can head out quickly without waiting for a vehicle.
• Hard-to-reach access: Operators can walk narrow lanes, orchard rows, paddy embankments and the spaces around houses that vehicles cannot reach.
• Days available: It is built for field durability and backed by after-sales service.
• Value: It serves both mosquito control and local agricultural work, so it is used throughout the year, not only during outbreaks.
• Fine mist: It helps chemicals be used efficiently for each area.

For dense communities or main roads, agencies can pair it with a thermal fogging machine such as the AIROFOG AT35 or a pickup-mounted unit such as the AIROFOG UM2, and track indicators by machine type to see which one contributes most to each part of the work.

A one-page council report template (fill in your real data)

Many leaders want a report they can read on a single page. The outline below works for a post-season summary or an annual report without long writing.

1. Purpose of the investment: For example, faster spraying around patients' homes and access to places vehicles cannot reach.
2. The before picture: Summarize how work was done before the machine, using baseline data. For example, equipment had to be borrowed, teams reached patients' homes slowly, and orchard rows were never sprayed.
3. The after picture: Summarize the same indicators after the machine entered service, in a comparison table.
4. What improved: Choose the two or three clearest changes, each supported by evidence from real logs.
5. What still needs work: For example, advance notice was not given for every round, or larval indices remain high in some villages.
6. Proposals for next year: Such as a maintenance budget, more volunteer training, or an additional unit for dense communities.
7. Data limitations: State plainly which data was reconstructed and which factors were outside your control, such as rainfall.

An honest report that shows both strengths and gaps usually earns more trust from the council than one that contains only good news, and it gives the next budget request a clear rationale.

Common mistakes when reporting indicators

• Changing definitions midway: Counting response time from hospital admission one year and from notification the next makes the years impossible to compare.
• Reporting only the good indicators: Councils and citizens will ask questions when they notice data is missing.
• Overclaiming: Saying the machine eliminated all cases, when risk reduction comes from several measures working together.
• No data sources: Figures without a source weaken the whole report.
• Forgetting to log downtime: Days when the machine was not ready matter for maintenance budgets and for judging after-sales service.
• Collecting data nobody uses: If an indicator never appears in a report or a decision, drop it and keep the system light enough for staff to maintain.

What leaders gain

• Answers in the council chamber: Before-and-after data instead of impressions.
• Citizen trust: Clear results, such as faster arrival and full plan coverage.
• Fewer or different complaints, with data to explain when questions come.
• An explainable budget: Maintenance or expansion requests backed by evidence.
• Auditable procurement: Standard-compliant government mosquito control equipment from an ISO and GMP supplier, aligned with procurement rules.
• Policy-level results: The same indicators can feed local development plans and annual performance reports.

For the public health team (technical box)

• Define indicators first: Write a short definition for each and keep it the same every year.
• Baseline: If no pre-purchase data exists, reconstruct it from work notebooks, loan letters and complaint records, and state the data limitations in the report.
• Spraying around patients' homes: Roughly 100 meters, with repeat rounds on your team's schedule. Log date, time and area every time.
• Timing: Early morning or evening, when Aedes mosquitoes feed. Note wind and weather briefly.
• Larval indices: Use the HI and CI surveys you already do to show that the "3 Keeps" measures run alongside spraying.
• Interpreting results: Case numbers have many causes. Always report them together with process indicators.
• Safety: Log protective equipment use and any incidents to improve training.

10 reasons SUPER ROTARY makes value reporting clearer

1. Fast deployment. Response time can genuinely improve because there is no wait for a vehicle or a borrowed machine.
2. Reaches places vehicles cannot. The hard-to-reach access indicator rises visibly.
3. Fine mist. Chemicals are used efficiently, and chemical use per round is easy to justify.
4. Compact. Staff and volunteers find it easy to use, which improves fatigue indicators.
5. Field-durable. Days available during the outbreak season tend to improve.
6. Two missions. It serves public health and agriculture, so it is used all year and its value is easy to explain.
7. After-sales service, technicians and spare parts. Repair time is shorter, and data does not break off.
8. An ISO and GMP supplier. 100% quality control before delivery reduces the risk of receiving an unready unit.
9. Meets government equipment standards. It can be registered as an asset and tracked through normal systems.
10. The anchor of your indicator plan. When every use of the mosquito fogger is logged, the value report builds itself from routine work. See the SUPER ROTARY product page.

Procurement tips: plan measurement from the approval stage

Put the measurement plan in the approval memo

State which indicators will track results and who is responsible, so the council sees from the start that the investment will be followed up.

Collect the baseline before the machine arrives

Use the procurement waiting period to reconstruct past data from notebooks, loan letters and complaint records.

Write after-sales and training conditions into the documents

Readiness indicators can only be good if technicians, parts and training are in place.

Budget for the full life cycle

Separate the equipment line from chemicals, consumables and maintenance, following your finance and procurement officers' advice.

Set a reporting rhythm

For example, a summary after each outbreak season and an annual report to the council, using the same sheet each time to reveal trends.

Example field perspective

(A composite example reflecting common viewpoints, not a verified review from a real person.)

"At first the team worried about extra paperwork. But once we used a single sheet and wrote a short line after every spraying trip, by the end of the season we had data our executives could take straight to the council. It was clear we were reaching patients' homes faster and getting into orchard rows we could not reach before. The following year, the maintenance budget was approved much more easily." (A subdistrict public health officer in the illustrative scenario.)

Three next steps

1. Call 065-556-6294 or LINE @whd268 for a quotation and specifications for the SUPER ROTARY.
2. Request a demonstration or training session, and discuss maintenance so readiness indicators stay strong.
3. Budget and purchase according to the rules, attaching the before-and-after indicator plan to the approval memo.

Frequently asked questions

Can we measure value if we have no data from before the purchase?

Yes. Reconstruct what you can from notebooks, loan letters and complaint records, state the limitations in your report, and start collecting systematically right away.

Should dengue case numbers be the main indicator?

Not on their own. Case numbers depend on many factors. Report them alongside process indicators such as response time and coverage.

What are HI and CI?

They are standard Aedes larval indices used by health teams. HI is the share of surveyed houses where larvae are found, and CI is the share of water containers with larvae. They track source reduction.

How is SUPER ROTARY different from a thermal fogger?

SUPER ROTARY is a backpack ULV sprayer that produces a fine mist, while a thermal fogger uses heat to create fog. The two complement each other depending on the area.

Can SUPER ROTARY really be used for agriculture?

The product information states it serves both public health and agriculture, so it can be used all year. Use the right chemical for each task and clean the machine as recommended when switching between jobs.

How often should results be reported to the council?

At least after each outbreak season and in the annual report, using the same sheet each time to show trends.

Does WHD provide training?

Contact WHD for demonstrations and operator training at 065-556-6294 or LINE @whd268.

Invest with evidence, measure results, report with confidence

View SUPER ROTARY products and prices - click here

Call 065-556-6294 · LINE @whd268 · Email worldhealthdisinfection@gmail.com

Browse the Government Mosquito and Insect Control Equipment Hub

World Health Disinfection Co., Ltd. (WHD), 88 268 Kanlapaphruek Road, Bang Khae, Bangkok 10160, Thailand

Related links

• Government Mosquito and Insect Control Equipment Hub, WHD's full range for government agencies.
• SOLO PORT423 backpack ULV sprayer, another option for field teams.
• AIROFOG AT35 thermal fogger for outdoor community spraying.
• Department of Disease Control, Ministry of Public Health (Thailand)
• WHO fact sheet: Vector-borne diseases

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