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Cells show only what the manufacturer listing publishes. Where a listing is silent the cell reads Not stated rather than an estimate. P1 is included on the strength of its stated inrush function even though the listing does not publish the capture window or the maximum current.

Cells marked Not stated mean the manufacturer listing does not publish that figure. They are not estimates. P3 and P4 are the same analyzer with different supplied clamps.

Cells read 'Not stated' where the manufacturer listing does not publish the figure. Resolution figures are not accuracy figures and are not shown in the accuracy column.

Cells show only what the manufacturer listing publishes. Where a listing is silent, the cell reads Not stated. No figures have been estimated or converted.

Stem length is the specification that decides which job a thermometer can do. A probe shorter than the depth you care about reads the surface layer, not the core. All seven are analog instruments with no batteries; none of the listings publishes an accuracy figure, so treat readings as working indications rather than calibrated measurements.

Cells show only what the listings publish. Where a listing is silent, the cell says Not stated. Resolution is not accuracy; no accuracy tolerance is published for any moisture channel on this page except where noted.

Cells marked Not stated are absent from the supplied listing text. Wind direction is listed as measured on units that publish direction data but do not give a numeric range. No accuracy figures were published for any of these products.

Cells are drawn only from the supplied listing text. Where a listing does not publish a figure the cell reads Not stated. P3 and P7 are functionally similar handheld meters; P7 is listed here because it publishes the pressure logging and altitude correction detail.

Cells marked Not stated are absent from the manufacturer listing. No figures have been estimated or converted.

Cells are drawn only from the supplied listing text. Where a specification is not published, the cell says so rather than estimating. Only P1, P2 and P6 publish the full sensor set needed for spray windows and evapotranspiration estimates.

Accuracy claims are reproduced as the manufacturer states them. None of the listings publish a reference method, test conditions or sample size, so the percentages cannot be compared against each other.

Cells show only what the manufacturer listing states. Where a listing is silent, the cell reads Not stated. The CCA and Ah figures are the tester's rated measurement range, not the capacity of the battery you own.

Range figures are open-air claims from the listings. Masonry, foil-backed insulation and metal studwork will all reduce the practical distance, and no listing publishes a through-wall figure.

Cells show only what each listing publishes. Where a listing is silent, the cell says Not stated. Accuracy figures marked as laboratory data are the manufacturer's description, not an independent measurement.

Cells marked Not stated are absent from the supplied listing text. Two-way control systems hold a band rather than reporting a reading, so accuracy and refresh columns do not apply to them.

Accuracy figures are as stated by the manufacturer. No independent verification was performed. The Fischer listing publishes no accuracy or refresh figures.

Cells show only what each listing publishes. Where a listing is silent the cell reads Not stated. Ranges are the main unit figures as stated; included probes are often narrower.

Cells marked Not stated mean the listing bullets do not publish that figure. No value has been estimated.

A shunt must be installed in the negative conductor so that every amp entering or leaving the bank passes through it. A monitor connected any other way will not count correctly.

Every meter here provides a DC microamp range, which is the single specification that defines an HVAC meter. Only some also measure temperature, and only some measure current without breaking the circuit.