


Dwyer Instruments UDL-104 | Universal data logger with internal temperature sensor | Four universal inputs | LCD display
There are three options for the Series UDL Universal Input Data Loggers: zero, two, or four universal inputs. The configuration of each universal input to accept a voltage, current, thermistor, RTD, or thermocouple can be changed independently. An internal temperature sensor and a digital input that can be used as a pulse counter to interface with flowmeters or other sensors that have a pulse output are features shared by all Series UDL data recorders. The digital input can also be used as a trigger to begin logging. An LCD display, an exterior humidity and temperature sensor, and an internal humidity sensor are optional options. The USB port on a PC is the interface for the Series UDL loggers.

Free UAE shipping available
- Specifications
- Features
- Downloads
Accuracy | Internal temperature: +/-1°F (+/- 0.5°C) External temperature: +/-1°F (+/-0.5°C) over 30 to 122°F (0 to 50°C), +/-2°F (+/-1°C) over -30 to 32°F (-30 to 0°C) and 122 to 158°F (50 to 70°C) Internal/external RH: +/-2.0% RH over 10%-90%, +/-4.0% RH over 0-10% and 90-100% RH |
Alarm | Programmable high/low |
Approvals | CE, RoHS |
Battery Life | 6 years (approx.) |
Housing Material | ABS plastic |
Input | RTD, thermocouple, thermistor, current, voltage, slidewire |
Interface | USB port (cable included) |
Manufacturer | Dwyer Instruments |
MEMORY SIZE | 0 or 2 universal inputs: 62,000 readings; 4 universal inputs: 128,000 readings |
Power | 3.6 V AA lithium metal battery, installed functional, user-replaceable |
Range | Internal temperature: -22 to 158°F (-30 to 70°C) Internal RH: 0 to 100% External temperature: -22 to 158°F (-30 to 70°C) External RH: 0 to 100% |
Resolution | All universal inputs: 16 Bit; Internal & external temperature: 12 Bit; Internal & external RH: 8 Bit |
Sampling Methods | Stop when full or continuous logging (wrap when full) |
Sampling Rate | Selectable from 1 second to 24 hours |
System Requirements | Windows® 98, Windows® 2000, Windows® ME, Windows NT®, Windows® XP, and Windows Vista® operating systems with 16 MB RAM, one free USB port |
Weight | 5.8 oz (165 g) |
- Equipped with one, two, or four universal inputs.
- Uses the PC's USB port as its interface.
- LCD and a humidity sensor are add-on features.
Related Products

Dwyer Instruments 160E-05 | Ellipsoidal tip Pitot tube | 1.22 meter insertion length

Dwyer Instruments 160E-05 | Ellipsoidal tip Pitot tube | 1.22 meter insertion length

Dwyer Instruments HTDL-30 | High temperature data logger with 24" flexible probe

Dwyer Instruments HTDL-30 | High temperature data logger with 24" flexible probe

Dwyer Instruments HTDL-20 | High temperature data logger with 2" rigid probe

Dwyer Instruments HTDL-20 | High temperature data logger with 2" rigid probe

Dwyer Instruments WTDL-20 | Temperature data logger with humidity output

Dwyer Instruments WTDL-20 | Temperature data logger with humidity output

Dwyer Instruments WTDL-30 | Temperature data logger with probe attachment

Dwyer Instruments WTDL-30 | Temperature data logger with probe attachment

Dwyer Instruments 472A-1 | Digital input thermocouple thermometer

Dwyer Instruments 472A-1 | Digital input thermocouple thermometer

Dwyer Instruments DL-8T | 8-channel temperature logger

Dwyer Instruments DL-8T | 8-channel temperature logger

Dwyer Instruments UDL-114 | Universal data logger with internal temperature and RH sensors | Four universal inputs | LCD display

Dwyer Instruments UDL-114 | Universal data logger with internal temperature and RH sensors | Four universal inputs | LCD display