Our new USB Data Loggers are a cost-effective solution for logging temperature and humidity data just about anywhere. With built-in alarm LEDs you'll know before you download that there has been a danger condition. Set the logging interval and the start time from the PC software and it's that easy. There are no cables, cradles, or dongles to keep track of.

NEW LCD Display Loggers
Keep visual track of your data with our new LCD data loggers for temperature and humidity. Their high contrast LCDs show Min, Max and current readings for both parameters. The display can be shut down during the log to extend battery life while allowing the user to periodically view the displayed readings.

NEW High Accuracy Temperature and Humidity Loggers
The TW-USB-2+ and TW-USB-2-LCD+ loggers feature high accuracy for temperature, humidity and dewpoint. New! Record critical temperature and humidity data with precision to ±0.6°F (±0.3°C) and ±2% RH.

Connect an External Probe
Connect any type K thermocouple to our TW-USB-TC or TW-USB-TC-LCD loggers and record temperatures to 2000°F depending on the probe selected. Log temperatures in ovens, freezers, and industrial equipment with one of our high temperature thermocouples.

Log in Real-Time
Select our TW-USB-RT and measure temperature directly to your PC in real time. Store up to seven days of data with user-programmable alarm thresholds for both temperature and humidity. The Windows (XP & Vista 32-bit only) software can send email and text alerts and alert audibly via the PC's internal speaker.

Waterproof Applications
With an IP 67 rating, our TW-USB-1, TW-USB-1-PRO, TW-USB-2, and TW-USB-2+ loggers are water resistant and can log in the harshest environments. Store up to 16,382 readings at temperatures to 176°F.

	TW-USB-LITE	TW-USB-1	TW-USB-1-PRO Stainless Steel
Input	Temperature	Temperature	Temperature
Environmental Range	+14°F to 122°F (-10°C to 50°C)	-31°F to 176°F (-35°C to 80°C)	-40°F to 257°F (-40°C to 125°C)
Measurement Range	+14°F to 122°F (-10°C to 50°C)	-31°F to 176°F (-35°C to 80°C)	-40°F to 257°F (-40°C to 125°C)
Accuracy	±4.5°F (±2.5°C)	±2°F (±1°C)	±0.4°F (±0.2°C)
Sample Rate	30 minute fixed	User selectable 10s to 12h	User selectable 1s to 12h
Battery/ Battery Life	CR1620/ 1-month life	3.6V 1/2AA/ 1 year life	3.6V 1/2AA/ 1 year life
Resolution	2°F (1°C)	1°F (0.5°C)	0.2°F (0.1°C)
Alarms	Hi/Low programmable	Hi/Low programmable	Hi/Low programmable
Alarm Status	Red/Green LED	Red/Green LED	Red/Green LED
Interface	USB	USB	USB
Memory	4,080 readings	16,382 readings	32,510 readings
Logging Start	Delay or immediate	Delay or immediate	Delay or immediate
IP Rating (water resistance)	na	IP67	IP67
Software	Windows 98, 2000, XP, Vista	Windows 98, 2000, XP, Vista	Windows 98, 2000, XP, Vista

 

	TW-USB-2 / TW-USB-2-LCD	TW-USB-2+ / TW-USB-2-LCD+
Input	Temperature, Humidity, Dewpoint; LCD Display (on LCD unit)	High-Accuracy Sensor— Temperature, Humidity, Dewpoint; LCD Display (on LCD unit)
Environmental Range	Temp: -31°F to 176°F (-35°C to 80°C) Humid: 0% to 100%	Temp: -31°F to 176°F (-35°C to 80°C) Humid: 0% to 100%
Measurement Range	Temp: -31°F to 176°F (-35°C to 80°C) Humid: 0% to 100%	Temp: -31°F to 176°F (-35°C to 80°C) Humid: 0% to 100%
Accuracy	Temp: ±1°F (±0.5°C); Humid: ±3% Dewpoint: ±2°F (±1.1°C)	Temp: ±0.6°F (±0.3°C); Humid: ±2% Dewpoint: ±2°F (±1.1°C)
Sample Rate	User selectable 10s to 12h	User selectable 10s to 12h
Battery/ Battery Life	3.6V 1/2AA/ 1 year life	3.6V 1/2AA/ 1 year life
Resolution	Temp: 1°F (0.5°C), Humid: 0.5%	Temp: 1°F (0.5°C), Humid: 0.5%
Alarms	Hi/Low programmable for both	Hi/Low programmable for both
Alarm Status	Red/Green LED	Red/Green LED
Interface	USB	USB
Memory	16,382 readings per channel	16,382 readings per channel
Logging Start	Delay or immediate, and push-button on LCD unit	Delay or immediate, and push-button on LCD unit
IP Rating (water resistance)	IP67 (TW-USB-2 only)	IP67 (TW-USB-2+ only)
Software	Windows 98, 2000, XP, Vista	Windows 98, 2000, XP, Vista

 

	TW-USB-RT	TW-USB-TC / TW-USB-TC-LCD
Input	Real-time Temperature, Humidity, Dewpoint	Temperature: K, J, or T Type Thermocouple; LCD Display (on LCD unit)
Environmental Range	Temp: +14°F to 140°F (-10°C to 60°C) Humid: 0% to 100%	+14°F to 104°F (-10°C to 40°C)
Measurement Range	Temp: +14°F to 140°F (-10°C to 60°C) Humid: 0% to 100%	-328°F to 2372°F (-200°C to 1300°C) for K type depending on thermocouple used.
Accuracy	Temp: ±3°F (±1.5°C); Humid: ±4.5% Dewpoint: ±5°F (±2.5°C)	±2°F (±1°C)
Sample Rate	1 second fixed	User selectable 1s to 12h
Battery/ Battery Life	N/A - powered by USB port. Must remain connected.	3.6V 1/2AA/ 6 month life
Resolution	Temp: 1°F (0.5°C), Humid: 0.5%	1°F (0.5°C)
Alarms	Hi/Low programmable	Hi/Low programmable
Alarm Status	Email, text, audible PC alerts	Red/Green LED
Interface	USB	USB
Memory	Stores 7 days to PC file	32,510
Logging Start	Real time	Delay or immediate, and push-button on LCD unit
IP Rating (water resistance)	na	na
Software	Windows XP, Vista (32-bit only)	Windows 98, 2000, XP, Vista

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NEW! High accuracy model TW-USB-2+ with temperature accuracy to ±0.3°C, and humidity accuracy to ±2%.

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Plugs directly into USB port.
No cables or adapter required.
Software is included.

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Click image to enlarge graph

View data graphically or export to spreadsheet.

Click here to download the EasyLogUSB software (v5.4).

Click here to download the EasyLog Real-Time software. (For use with TW-USB-RT only)

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Plug any type K, J, or T thermocouple into the TW-USB-TC logger.
Click here to order probes.

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Rugged Metal Case
Fits TW-USB-1 or -2, watertight to IP67/NEMA-4X.

	NIST-Traceable Temperature Calibration Model: CAL-2PT 2-Point calibration Traceable certificate	2-point temperature calibration performed in ThermoWorks' NIST-Traceable calibration lab. Includes calibration report and actual test data.	Qty:
	NIST-Traceable RH Calibration Model: CAL-RH2PT 2-Points: 30%, 60% Lab calibration using certified RH sources Single ambient temperature	2-point humidity calibration performed in ThermoWork's NIST-Traceable calibration lab. Includes calibration report and actual test data. Includes a single temp at ambient.	Qty:

To Order:

TW-USB-LITE	Temperature Data Logger, Economy
TW-USB-1	Temperature Data Logger, IP67
TW-USB-1-PRO	Temperature Data Logger, Stainless Steel, IP67
TW-USB-2	Relative Humidity & Temperature & Data Logger, IP67
TW-USB-2-LCD	Relative Humidity & Temperature Data Logger with LCD
TW-USB-2+	High Accuracy Relative Humidity & Temperature & Data Logger (±0.3°C / 2%RH), IP67
TW-USB-2-LCD+	High Accuracy Relative Humidity & Temperature & Data Logger, (±0.3°C / 2%RH), with LCD
TW-USB-RT	Relative Humidity & Temperature Data Logger, Real-time
TW-USB-TC	Thermocouple Temperature Data Logger, Accepts Type K Probes
TW-USB-TC-LCD	Thermocouple Temperature Data Logger with LCD, Accepts Type K Probes
TW-USB-CASE	Rugged Metal Case. Fits TW-USB-1
839-100	Replacement battery SL350, 3.6V Lithium. 1/2 AA
BATT-2/3AA	Replacement battery SL350, 3.6V Lithium, 2/3 AA (USB-1-PRO)