| LIGHTMETER | Photographer's instrument for measuring the level of illumination (5,5) |
| GLOW | A good but not high level of illumination (4) |
| ANEMOMETER | Instrument for measuring the speed of the wind (10) |
| LACTOMETER | Instrument for measuring the density/purity of cow's milk (10) |
| BRRROMETER | Instrument for measuring the cold? |
| CLERESTORY | An upper row of windows in a cathedral or large church, above the level of the aisle roofs |
| SUBLIMINAL | Below the level of consciousness |
| SUNGLASSES | Dynasty left fools — they lower the level of brightness |
| OPISOMETER | Device for measuring the length of curved lines, especially on a map |
| SPHEROMETER | Instrument for measuring the radius of the curvature of a concave or convex surface, originally used by opticians when making lenses (11) |
| NORTHKOREA | Country that recently "built 500 objects contributable to raising the level of modernization," per its website |
| DEESCALATE | Reduce the level of highly ranked athlete recalled about running slower than expected (2-8) |
| NEPHOSCOPE | Cloud observer for measuring the altitude, apparent velocity and direction of such as a nimbus (10) |
| OPTOMETER | Formerly, an instrument for measuring the refractive power of the eye, used when prescribing corrective lenses (9) |
| RHEOMETER | Instrument for measuring the velocity of blood flow (9) |
| QUADRANT | Old instrument for measuring the altitude of heavenly bodies (8) |
| SALINOMETER | Instrument for measuring the salt content of water (11) |
| SOUNDMIXER | One who controls the levels of audio in a recording studio or broadcast production (5,5) |
| CALLIPER | Instrument for measuring the distance between two points (often used in the plural) (8) |
| ALTIMETER | Instrument for measuring the applause on "Tool Time"? |
