Conditional verdict: Buy the PCE-TG 300-HT5 when your job is thickness reference records on prepared, known, cool homogeneous solid coupons and the supplied HT5 probe’s documented range and geometry fit those samples. Skip it if you need a complete coating-measurement kit, independently established acceptance certification, hot-surface instructions, or turnkey computer data transfer. The exact offered product is PCE-TG 300-HT5, not a generic TG 300 base unit or another probe configuration.[1][3]
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What this exact package is
The selected HT5 configuration pairs the PCE-TG 300 meter with a 5 MHz HT5 sensor measuring 12 mm in diameter. The maker lists the HT5 sensor at 1–600 mm on steel, with a 30 mm minimum pipe diameter and a maximum sensor temperature of 300 °C.[1]
The selected maker package lists the HT5 sensor, 100 mL coupling gel, carrying case, four AA batteries, and user manual; confirm the exact seller’s shipment. Do not silently replace that package with the family manual's default P5EE probe and 118 mL gel contents; those are different package details.[1][2]
The HT5 range is a steel reference, not a universal promise for every material or shape. The meter supports selectable sound velocity and the usable result depends on material, probe, calibration, coupling, geometry, and surface condition.[1][2]
Where it fits best
This is a practical candidate for prepared, homogeneous, nonhazardous, cool bulk-solid coupons where you want thickness readings and stored reference records without cutting the part. The family documentation lists metals, plastics, ceramics, epoxy resin, glass, and other homogeneous structures as measurable material classes, while also describing probe changes for damping or scattering materials.[2]
Pulse-echo is the relevant starting mode for the supplied HT5 workflow. A useful reading depends on the material, probe and calibration supporting a usable return, but the published range and accuracy figures do not establish defect-detection certainty, structural acceptance, or a guaranteed result on an unknown construction.[1][2]
The strongest buying case is a cool inspection bench, incoming-material check, maintenance reference, or comparative thickness record where the operator can identify the material and establish a sensible sound velocity or known-thickness reference before recording results.
Readability is not accuracy
The display resolution can be adjusted to 0.1 mm, 0.01 mm, or 0.001 mm, but the 0.001 mm setting is readability, not achieved accuracy or uncertainty.[1][2]
The maker publishes ±0.04 mm for H below 10 mm and ±0.4% of H for H above 10 mm, where H means the workpiece thickness. The supplied specifications do not define the boundary at exactly 10 mm, so treat that point as unresolved rather than inventing a rule.[1][2]
These are published specification fields, not an independently established uncertainty or traceability statement. Sound-velocity calibration requires the correct material velocity or a known reference thickness; the manual documents zero-point and two-point calibration as well as coupling dependencies.[2]
Do not assume coating measurement
Echo-echo capability is not established by the HT5 sensor alone. The maker explicitly ties Echo-Echo work, including coated workpieces, to the optional PCE-TG 300-P5EE sensor.[1]
The family manual gives a general Echo-Echo range of 2.5–60 mm, while the maker's current table lists 2.5–100 mm for the P5EE configuration. Because those published values conflict, this review does not promise a coating-exclusion range.[1][2]
If you need the thickness of underlying material while excluding a coating, confirm the optional P5EE configuration and its applicable specification before purchase. Echo-Echo coating exclusion is not a measurement of the coating layer itself.[1][2] The selected HT5 kit should be judged as a pulse-echo bulk-thickness reference configuration, not an included through-coating solution.
Temperature and operating limits
The HT5 probe is listed for high-temperature use up to 300 °C, but the meter itself is specified for an operating ambient range of 0–50 °C.[1][2] A probe temperature rating therefore does not authorize placing the handheld meter on a hot surface or measuring a hot component without a documented, suitable procedure.
The selected maker package lists 100 mL coupling gel, without establishing its suitability at the probe’s maximum temperature. High-temperature coupling gel is separately listed as an optional accessory, so do not claim that the included gel is valid for ordinary 300 °C measurement.[1][2]
For this review, the defensible scope is known, cool coupons and controlled prepared solids. Pressure-vessel decisions, hot measurement, hazardous service, fault-finding certainty, and structural acceptance require separate procedures and evidence.
Records, printing, and software dependencies
The meter has nonvolatile memory for 100 data groups with 100 records each and provides normal, scan, and difference views. These functions help organize readings, but they do not prove complete whole-coupon mapping or measurement repeatability.[2]
Four 1.5 V AA batteries are specified, with a published continuous operating time of 100 hours; that runtime is a documented figure, not a test result from this review.[2]
Bluetooth printing requires the optional Bluetooth printer. USB communication requires optional software and driver installation, plus a USB cable; those dependencies are not listed as included in the selected HT5 package.[1][2] Bluetooth printing should not be read as cloud sync, phone compatibility, or a modern operating-system guarantee.
The buying decision
Buy if you can supply the operator knowledge, calibration references, suitable coupling practice, and cool homogeneous workpieces needed for defensible pulse-echo records. Skip or specify a different configuration if your decision depends on included Echo-Echo coating exclusion, a confirmed individual calibration record, hot-surface operation, structural acceptance, or included USB software and cable. The base package does not list a calibration certificate or step block; the maker offers these separately. Their purchase and applicability to the individual shipment remain unverified.[1][2]
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Sources
The linked operating manual covers the TG300 family and its default package; the selected HT5 maker package differs.[1][2] These documents do not establish the individual shipment, calibration or achieved uncertainty.