DL-4C Data Logger

This data logger is used for monitors that use a voltage analog output signal. The DL-4 data logger measures and transmits temperature, relative humidity, and light intensity data wirelessly. It also includes an external analog input to attach a variety of additional sensors. This self-contained wireless data logger lets you use your mobile device or Windows computer and Onset’s free HOBOconnect app to access data, at any time, over a 100-foot range via Bluetooth Low Energy (BLE) technology.

Part Number: DL-4C

SKU: DL-4C

Customizable Options:

Inputs *

Additional 4-20 mA Cables

$365.00

Description / DL-4C Data Logger

What Measurements Does This Data Logger Support?

The DL-4C data logger supports monitors that use a current analog output signal. We also offer the DL-4V data logger that supports monitors that use a voltage analog output signal.

1-Channel vs. 4-Channel

DL-4C data loggers has a 1-channel default configuration, but there is also an option to order them with 4-channel inputs. Note: The 1-Channel DL-4C is capable of measuring temperature, relative humidity, and light intensity. The 4-channel DL-4C does not have this capability, the 4-channel option will only work as wireless data logger for multiple sensors. For ordering your DL-4V, you will be able to choose between 1-3 additional cables with your data logger (the DL-4C's default is one 4-20 mA cable). When purchasing multiple cables, we only offer the ability to purchase the same kind of cable. If you would like to purchase an assortment of cables (ex: two 0-5 VDC cables and two 4-20 mA cables) please contact us and we'd be happy to process the order.

Compatible Monitors

Main Features

Bluetooth communication for wireless data offload
16-bit resolution for highly-accurate measurements
Stores 1.9 million measurements for longer deployments between offloads
New Self-Describing sensors with automatic configuration for fast deployment
Compatible with existing sensors for a wide range of indoor monitoring
Audible and visual LCD-screen alarms notify you if sensor becomes unplugged or a reading exceeds set thresholds

DL-4 App

*Data tracking on the DL-4C, information is saved so it can be reviewed later or printed off.

*Custom parameters you can set for data logging

Sensor Specifications

Temperature Sensor
Range	-20° to 70°C (-4° to 158°F)
Accuracy	±0.20°C from 0° to 50°C (±0.36°F from 32° to 122°F)
Resolution	0.002°C at 25°C (0.004°F at 77°F)
Drift	<0.1°C (0.18°F) per year
RH Sensor
Range	0% to 100% at -20° to 70°C (-4° to 158°F); exposure to conditions above 95% may temporarily increase the maximum RH sensor error by an additional 1%
Accuracy	±2.5% from 10% to 90% (typical) to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% and above 90% ±5% typical
Resolution	0.01%
Drift	<1% per year typical
Response Time
Temperature	11 minutes in air moving 1 m/s (2.2 mph)
RH	30 seconds to 90% in airflow of 1 m/s (2.2 mph)
Light Sensor
Range	0 to 167,731 lux (15,582 lum/ft2)
Accuracy	±10% typical for direct sunlight (see Light Measurement on page 4 for more details)

Logger Specifications

Operating Range	-20° to 70°C (-4° to 158°F)
Radio Power	1 mW (0 dBm)
Transmission Range	Approximately 30.5 m (100 ft) line-of-sight
Wireless Data Range	Bluetooth Low Energy (Bluetooth Smart)
Logging Rate	1 second to 18 hours
Logging Modes	Fixed interval (normal, statistics) or burst
Memory Modes	Wrap when full or stop when full
Start Modes	Immediate, push button, date & time, or next interval
Stop Modes	When memory full, push button, date & time, or after a set logging period
Restart Mode	Push button
Time Accuracy	±1 minute per month at 25°C (77°F)
Battery Type	Two AAA 1.5 V alkaline batteries, user replaceable
Memory	4 MB (1.9 million measurements, maximum)
Full Memory Download Time	Approximately 4 to 15 minutes depending on the mobile device; may take longer the further the device is from the logger
LCD	LCD is visible from 0° to 50°C (32° to 122°F); the LCD may react slowly or go blank in temperatures outside this range
Size	11.28 x 5.41 x 2.92 cm (4.44 x 2.13 x 1.15 in.)
Weight	123 g (4.34 oz)
Environmental Rating	IP54