Etekcity Infrared Thermometer Laser Temperature Gun 1080, -58°F~ 1130°F for Meat Food Candy Pizza Oven, Heat Gun for Cooking, Kitchen, Fridge, Reptile, BBQ, HAVC, Adjustable Emissivity & Max Measure

If you don't have one, get an infrared thermometer. This economical model works fine for a lot of people: https://www.amazon.com/dp/B00DMI632G I had one and eventually sprang for a Thermoworks model that costs 3x as much and is maybe 5% better. For NY style you're looking for a deck temperature around 600f. The usual play with gas ovens is to run the flame at maximum to pre-heat and then turn it down before launching. And maybe turn it back up at the end if you want to crisp up the top a bit more. Oh, and i find that having the flame at maximum will skew what the IR gun reads several degrees.

Non-contact is for the surface of things, like your pan. Stabby ones - food thermometers - are for checking the internal temperature of your food. Best to have both. If you're using stainless steel, keep in mind that a non-contact thermometer won't read accurately on a clean, reflective pan. You can get thermometers that have an emissivity setting, so you can compensate for the reflection. Either type can be Instant Read - the more expensive ones are more "instant." A meat temperature guide like this is used along with a stabby thermometer.