For straight spot checks where speed matters, the ThermoPro TP620 is the stronger pick: ThermoPro lists a 0.5-second response time and ±0.9°F (±0.5°C) accuracy. The TP710 asks you to accept a slower 3 to 4 second response and ±1.8°F (±1.0°C) accuracy in exchange for a second, wired probe that lets you track a long cook hands-free. If you mostly sear, grill and roast with quick pokes, buy the TP620. If you smoke brisket or roast large cuts and want continuous temperature monitoring from the same tool, the TP710 earns its place, and it is currently listed for less.
One point worth clearing up first: both are marketed with “instant-read” in their names, but the TP710 is a 2-in-1 that pairs a fold-away instant-read probe with a wired probe for continuous tracking. That dual-probe design, not display polish, is the real reason to choose it.
At a Glance: Verified Specs Side by Side
| Spec | ThermoPro TP620 | ThermoPro TP710 |
|---|---|---|
| Response time | 0.5 seconds (US page); 1 to 3 seconds on a regional page | 3 to 4 seconds |
| Stated accuracy | ±0.9°F (±0.5°C) | ±1.8°F (±1.0°C) |
| Sensor | Thermocouple | NTC |
| Waterproof rating | IP65, safe to rinse under running water | IP65, allows easy rinsing under running water |
| Battery | 1 × AAA | 1 × AAA, not rechargeable |
| Display | 180° auto-rotating backlit LCD | Dual backlit LCD with target and current temps side by side |
| Probes | Single fold-away probe | Fold-away probe plus 48-inch wired probe |
| Extra features | Temperature lock, user calibration | Temperature lock, user calibration, 7 USDA presets and custom alarms |
| Temperature range | -58 to 572°F (-50 to 300°C) | -58 to 572°F (-50 to 300°C) |
| Warranty | 1 year, 3 years with registration | 1 year, 3 years with registration |
| Listed price | $39.99 sale, $49.99 regular | $26.99 sale, $29.99 regular |
Prices are promotional listings from ThermoPro’s own product pages and can change; confirm the current figure before ordering. Neither model has been independently tested for real-world accuracy or durability in the evidence behind this comparison, so the accuracy figures above are manufacturer specifications, not measured results.
ThermoPro TP620: Built for Speed
The TP620 is the faster and more accurate of the two on paper. ThermoPro’s US product page lists a 0.5-second response and ±0.9°F accuracy from a thermocouple sensor. A regional ThermoPro page instead lists 1 to 3 seconds for the same model, so treat the exact speed with some caution; either way, it is specified faster than the TP710.
Its practical strengths:
- Fast spot checks: short probe time means less heat lost from an open grill or oven door.
- Readable from awkward angles: the 180° auto-rotating backlit display flips to stay upright.
- Simple power: one AAA battery, with no charging routine.
- Working features: temperature lock and user calibration are both supported.
- Rinse-friendly: IP65, which ThermoPro describes as safe to rinse under running water.
Limits worth knowing:
- Single probe only. There is no wired probe and no alarm, so it cannot monitor a long cook by itself.
- IP65 is not a submersion rating. Rinsing is supported; dunking is not.
Who should skip it: anyone who wants continuous monitoring of a smoker or oven without opening the door, or who wants a thermometer they can leave in place while they walk away.
ThermoPro TP710: Two Probes, More Flexibility
The TP710 is the more versatile tool because it monitors as well as measures. ThermoPro describes it as a 2-in-1 with a fold-away instant-read probe and a 48-inch wired probe for continuous tracking. It reads in 3 to 4 seconds with ±1.8°F accuracy from an NTC sensor.
Its practical strengths:
- Hands-free tracking: the wired probe monitors a roast or a barbecue’s ambient temperature over hours, not seconds.
- Two readings at once: the dual backlit LCD shows target and current temperatures side by side.
- Presets and alarms: seven USDA-recommended presets plus custom alarms.
- Same working features as the TP620: temperature lock, user calibration, an IP65 rinse-friendly body and the same temperature range.
- Rotating display: the screen and dual readout make it easier to read at odd angles.
Limits worth knowing:
- Slower and less precise on paper: 3 to 4 seconds and ±1.8°F versus the TP620’s faster, tighter specifications.
- Not rechargeable: it runs on AAA batteries, so there is no charging cable to lose and no battery to wear out.
- Oven limits apply: the fold-away probe is not designed to work as an oven thermometer, and oven heat above 200°F (93°C) can affect the reading when the probe is not inserted into food.
Who should skip it: anyone who only ever checks a steak for ten seconds and wants the fastest possible number.
The Differences That Actually Matter
Speed and Accuracy
This is the TP620’s clear win. ThermoPro’s US page lists a 0.5-second response and ±0.9°F accuracy against 3 to 4 seconds and ±1.8°F for the TP710. For a single steak, the gap is trivial. Across a dozen chops with the grill lid open, it adds up. Note the regional discrepancy on the TP620’s response time before treating 0.5 seconds as exact.
Probes and Monitoring
The most consequential difference is not speed at all. The TP710’s 48-inch wired probe lets it track temperature continuously, which the TP620 cannot do. If you cook brisket, pork shoulder or whole birds, that capability matters more than a couple of seconds.
Display Ergonomics
Both have backlit, auto-rotating displays, so the old complaint about fixed screens no longer separates them cleanly. The TP710 adds a dual readout showing target and current temperatures at once, which is more useful during a monitored cook than during a quick poke.
Waterproofing and Cleaning
Both carry an IP65 rating and are described by ThermoPro as safe to rinse under running water. Neither rating supports submerging the body in a sink, so clean both by rinsing the probe and wiping the housing rather than dunking.
Battery
Both use AAA batteries. The TP710 is explicitly not rechargeable, which means no charging cable to manage and no sealed battery to degrade. Battery life in hours is not published for either model.
Price
ThermoPro currently lists the TP620 at $39.99 (regular $49.99) and the TP710 at $26.99 (regular $29.99). The more capable model is currently the cheaper one, though promotional pricing moves.
How to Choose by Cooking Scenario
High-heat grilling and quick sears: choose the TP620. Its speed and tighter stated accuracy suit quick pokes with the lid open.
Smoking, barbecuing and long roasts: choose the TP710. The wired probe tracks the cook continuously and the alarms free you from standing by the grill. Keep the fold-away probe out of oven heat above 200°F (93°C) when it is not inserted in food.
Indoor roasting and baking: either works, but the TP710’s dual display and presets make monitored oven cooks easier.
Frequent rinsing: both are IP65, so neither has an advantage, but neither should be submerged.
Lowest current outlay: the TP710 is listed lower right now.
Neither Is a Leave-in Thermometer (with One Exception)
The TP620 is strictly an instant-read tool: insert, read, remove. It has no probe designed to stay in the oven.
The TP710 is different. Its fold-away probe is for spot checks and is not designed to work as an oven thermometer. Its wired probe, however, can measure ambient oven and barbecue temperature for continuous tracking. That makes the TP710 a partial leave-in solution, not a fully wireless one: the probe is corded, and neither model supports Bluetooth or app monitoring.
If you want truly wireless leave-in monitoring, look at a different product line. ThermoPro’s TempSpike Pro is the TP980, a wireless leave-in thermometer, and it is not the TP710. For a corded probe-style alternative, the ThermoPro TP20 comparison covers another leave-in option.
Calibration and Accuracy Checks
Both models support user calibration. ThermoPro’s TP620 manual instructs users to calibrate with an ice-water bath if readings seem inaccurate. The ice-water calibration method walks through the approach; follow each model’s own manual for the exact button sequence rather than assuming the steps are identical.
Calibration corrects drift over time. It does not turn a manufacturer’s accuracy specification into an independently verified result, and no independent test data for either model was available for this comparison.
Final Verdict
Buy the ThermoPro TP620 if: speed and the tightest stated accuracy are your priorities, you only need spot checks, and you prefer a straightforward AAA-powered tool.
Buy the ThermoPro TP710 if: you want one thermometer for both quick checks and hands-free monitoring of long cooks, you value presets and alarms, and you accept a slower response and wider stated accuracy in exchange. At its current listed price, it is also the cheaper of the two.
There is no single overall winner here, because the two models are built for different jobs. Match the probe setup to how you actually cook, and the choice becomes straightforward.
