TL-1A
The intrinsically safe TL-1A thermometer is intended to be used anywhere a precision glass stem thermometer or other type thermometer may be used.
The TL-1A is our latest stem thermometer. It is an improved version of the original ThermoProbe model TL-1. The TL-1A incorporates glass thermometer simplicity and reliability with the ease of a digital display. Like precision mercury thermometers, the TL-1A 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 electronic thermometers, the “Cordless” TL-1A 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.

NEW FEATURES exclusive to the TL-1A include; auto-off after 20 minutes to save battery life, minimum reading, maximum reading, averaging, easier °F to °C switching and an optional serial output. In addition, the new display constantly indicates temperature increasing or decreasing activity.
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
|
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) Sensor mount acetyl plastic Electronics and display in 3.5" x 1.2" anodized Aluminum enclosure Molded Silicone seal Highly durable display window, graphics and membrane switches |
Weight: |
3 ounces, 93 grams |
Temperature: |
Range 14 to 320°F, -10 to 160°C Resolution 0.01 Degrees Calibrated Accuracy ±0.1°F , ±0.07°C |
Temperature Response: |
32 to 200 °F in 25 seconds, water bath. |
Electronics: |
Microcontroller and precision 20 bit A/D Converter FLASH memory Minimum ambient temp dependant on battery condition Maximum ambient temp. 75 °C 100 Ohm, Class A Platinum RTD, 0.05%/yr max. drift |
Battery: |
20mm Coin Size 3V Lithium, Type 2032 500 hour service life at room temperatures. |
Options: |
Stem length to 39", 1 m. Custom lengths available. Separate probe with high temp PFE cable Available in rugged field version, TL-1W Certification by independent calibration laboratory |
Future: |
Intrinsically Safe Certification Serial Cable and User Software |
Certifications

Product Overview
The intrinsically safe TL-1A thermometer is intended to be used anywhere a precision glass stem thermometer or other type thermometer may be used. The TL-1A is our latest stem thermometer. It is an improved version of the original ThermoProbe model TL-1. The TL-1A incorporates glass thermometer simplicity and reliability with the ease of a digital display. Like precision mercury thermometers, the TL-1A 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 electronic thermometers, the “Cordless” TL-1A 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.

NEW FEATURES exclusive to the TL-1A include; auto-off after 20 minutes to save battery life, minimum reading, maximum reading, averaging, easier °F to °C switching and an optional serial output. In addition, the new display constantly indicates temperature increasing or decreasing activity.
Specifications
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
|
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) Sensor mount acetyl plastic Electronics and display in 3.5" x 1.2" anodized Aluminum enclosure Molded Silicone seal Highly durable display window, graphics and membrane switches |
Weight: |
3 ounces, 93 grams |
Temperature: |
Range 14 to 320°F, -10 to 160°C Resolution 0.01 Degrees Calibrated Accuracy ±0.1°F , ±0.07°C |
Temperature Response: |
32 to 200 °F in 25 seconds, water bath. |
Electronics: |
Microcontroller and precision 20 bit A/D Converter FLASH memory Minimum ambient temp dependant on battery condition Maximum ambient temp. 75 °C 100 Ohm, Class A Platinum RTD, 0.05%/yr max. drift |
Battery: |
20mm Coin Size 3V Lithium, Type 2032 500 hour service life at room temperatures. |
Options: |
Stem length to 39", 1 m. Custom lengths available. Separate probe with high temp PFE cable Available in rugged field version, TL-1W Certification by independent calibration laboratory |
Future: |
Intrinsically Safe Certification Serial Cable and User Software |
Certifications

