Designed to meet the needs of the amateur or professional photographer. Exclusive mirrorband dial eliminates parallax error. All stainless steel construction. Temperature range 25°-125°F. Unique stainless steel clip adapts the thermometer for tray or tank use. Scale has clearly defined numerals and divisions indexed at 68°F. Dial diameter - 1-3/4" - Stem length 6". Accuracy .25% at 68°F and within  1° over the remainder of the range. External adjustment for calibration.