ThermoProbe TL1-W


Product Overview
The TL1-W intrinsically safe thermometer is a modified field version of our successful TL1-A thermometer. It features a rugged frame for reinforcement and is designed for continuous operation, but can be easily powered off if desired.

The TL1-W thermometer is intended to be used anywhere a precision glass stem thermometer or other type thermometer may be used. The TL-1W incorporates glass thermometer simplicity and reliability with the ease of a digital display. Like precision mercury thermometers, the TL1-W has accuracy, repeatability and long-term stability. But unlike those thermometers there will never be problems with mercury separation or hazardous material cleanup. Different from most precision electronic thermometers, the “cordless” TL1-W has no wires to get in the way or break. Battery replacement is easily done through a sealed cover. Encoded calibration is unaffected by temperature, vibration or battery removal. Low battery display, and failure mode indications protect the user from false data.

4 Point NIST Traceable Calibration and a one year warranty included.


  • Minimum reading
  • Maximum reading
  • Averaging
  • Easy °F to °C switching
  • Backlight
  • Sturdy frame
  • Display arrows indicate increasing or decreasing temperature

Display: LCD with 0.25 inch characters               Trend Indicating Arrows               Low Battery & Fault indication
User Functions: Auto-off after 20 minutes or continuous operation               Lowest Reading, Highest Reading, Average Reading               Switchable in Units of °F or °C               Display tenths or  hundredths resolution
Construction: Stainless steel temperature sensor; Standard Sensor length 8″ (20cm)               Standard diameter 1/4″ (6.35mm) with reduced diameter tip of 3/16″ (4.76mm)               Sturdy Acetal frame surrounding aluminum enclosure               Electronics and display in 3.5″ x 1.2″ anodized Aluminum enclosure               Molded Silicone seal.               Highly durable display window,               graphics and membrane switches.
Weight: 6.5 ounces, 180 grams
Temperature: Resolution 0.01 Degrees               Calibrated Accuracy: ±0.1°F  from 14 to 320°F ±0.06°C from -10 to 160°C               NIST Traceable Report of Test
Temperature Time Constant: 8 seconds in circulated water bath    (63.2% response to temperature change)
Electronics: Ultra Low Power Microcontroller               FLASH Memory               20 bit A/D Converter               Recommended Ambient Temperature Range for Best Accuracy 32° to 112°F, 0° to 44°C
Sensor: 100 Ohm, Class A 1/3 DIN RTD               Immersion depth 4″, 11cm
Battery: 2 AAA Duracell MX2400               Battery Life several hundred hours depending on backlight usage               Battery Operating Range -4 to 130°F, -20 to 54°C Note: Battery may not provide adequate power if ambient temperature is below -4°F, -20°C or above 130°F, 54°C

Specifications subject to change

Typical Applications
Distillations, temperature baths, melting point tests, flash point tests, reference, thermowells, provers, temperature calibration for flow meters.
Industries: Laboratory           Petroleum           Pipeline           Pharmaceutical           Food