5 questions “Funnel the Spec” to one product type.

Start at the top, follow the path down, end on the recommendation. Designed for distributors to send a customer ahead of a quote call.

Question 1

What is the customer trying to measure or prove?

Demand · "how much air do we actually use?"

Question 2a

One-time audit baseline or continuous monitoring?

If One-time audit · 2-4 week datalog

Recommend

Thermal Mass Flow Meter (insertion-probe)

Hot-tap insertion-probe on the main header, datalogging at 1-minute intervals. Produces the demand-profile dataset that anchors leak repair, dryer sizing, and compressor sizing.

If Continuous · permanent install + SCADA

Recommend

Thermal Mass Flow Meter (with Modbus/Ethernet)

Permanent install with Modbus or Ethernet/PoE into the plant's energy-monitoring system, datalogging continuous, alerts on flow excursions. Anchor of any compressed-air chargeback or ESG-reporting program.

Waste · "where is all our air going?"

Question 2b

Audit service (SPC walks the plant) or tool sale (customer runs the program)?

If Audit service · SPC tech walks the plant

Recommend

Ultrasonic Leak Detector (camera variant)

LD 510 / UltraCam acoustic-imaging detector for overhead and photo-documented leaks. SPC produces the quantified leak report; the report sells the downstream repair work (fittings, couplers, FRLs, hose).

If Tool sale · customer runs the survey

Recommend

Ultrasonic Leak Detector (LD 500 handheld)

LD 500 audio + numerical-estimate handheld with report-export software included. Half-day training for the customer's maintenance lead. Customer owns the program; SPC owns the consumable resupply.

Dew point · "is the dryer actually working?"

Question 2c

Verifying a refrigerated dryer or a desiccant dryer?

If Refrigerated · target +35 to +50°F PDP

Recommend

Dew Point Monitor (refrigerated-grade)

Fixed transmitter at the dryer outlet, range covering +35 to +50°F PDP, alarm setpoint at +45°F for early warning before wet air reaches the tools. Pair with a portable handheld for multi-point spot-check work.

If Desiccant · target -40°F PDP or below

Recommend

Dew Point Monitor (desiccant-grade to -80°C)

Service-grade portable for commissioning plus a fixed transmitter at the dryer outlet sized for the deep range. A desiccant without a dew-point monitor is unverified equipment — the entire reason to spec desiccant is the deep dew point, and only the monitor proves it's there.

Compliance · "can we prove ISO 8573-1 to an auditor?"

Question 2d

All three parameters (particle / water / oil) or a subset?

If Subset · 1-2 parameters in compliance scope

Recommend

ISO 8573-1 Analyzer (scoped set)

Many customers need only two of three parameters — particle and water for food contact (oil already excluded by oil-free compressor), water and oil for pharma on a desiccant system. Scope to the compliance driver, not the full set by default.

If Full three-parameter · pharma / electronics / medical

Recommend

ISO 8573-1 Analyzer (full three-parameter set)

PI 500 / PC 400 series — particle counter, dew point, oil sensor consolidated through a Modbus logger. Tied to a written SOP and an annual calibration program. The audit-grade deliverable an FDA / GFSI / NFPA 99 inspector accepts.

Pressure · "is the line at setpoint and are filters loading?"

Question 2e

Status indication, filter differential, or control-loop feedback?

If Filter differential · condition-based change-out

Recommend

Pressure Sensor (differential pair)

Pair of sensors (or a single differential sensor) across each major filter stage — coalescing, particulate, activated carbon. Highest-payback pressure-sensor application; converts calendar change-outs into condition-based, saves element cost and avoidable compressor energy.

If Status or control feedback · compressor / header / POU

Recommend

Pressure Sensor (4-20 mA or IO-Link)

Adsens AP-series electronic sensor at compressor discharge, system header, and critical points of use. 4-20 mA into the controller or IO-Link into the modern PLC. Lead with the broad middle tier and reserve audit-grade transmitters for the high-criticality slots.

If the customer doesn't know which measurement they need, work the business problem backward: "what conversation made you call us?" An electric bill that jumped → flow meter + leak detector. A wet-air complaint at the tools → dew point monitor. An auditor's finding on compressed-air purity → ISO 8573-1 analyzer scoped to the parameters in the finding. Filters being changed on a calendar regardless of condition → pressure-sensor differential pair. The instrument follows the question, not the other way around.

What you can't measure, you can't manage — and what you don't manage is the largest line on your electric bill.

SPC distributor playbook System Monitoring · the layer that turns hope into proof