Data Logger | DL – RMT

DL RMT (Remote Monitoring Temperature) is a compact wireless IoT data logger designed for cold storage environments where human access is limited. It continuously records Temperature, Humidity, CO2 data locally, and securely transmits it to the cloud via GSM/Wi-Fi, as per selected order code.

With its multi-channel alarm system (SMS, email, buzzer, LED), DL RMT provides instant alerts on critical changes. The cloud dashboard enables remote monitoring and threshold configuration, eliminating the need for on-site access.

A dedicated mobile app makes setup and management seamless, without requiring a physical connection. Built for demanding environments like cold rooms and warehouses, DL RMT offers a clear display for GSM/Wi-Fi and battery status, energy-efficient operation, and reliable battery backup—ensuring uninterrupted, unattended monitoring.

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Category: Wireless Data Loggers

Features

Smart, Reliable Monitoring for Cold Storage Environments
GSM and /Wi-Fi connectivity for cloud upload or local web access
Real-time Sensor data acquisition
Up to 3500 data records
Rollover of data after 30 days
Device Configuration through Mobile Application
Alarm settings configuration from Cloud server
User friendly Intuitive graph views, data table on Cloud application
SMS, Email notification for Alarm Trigger condition
For Instantaneous data view – OLED display
Battery backup of 14 days*
OTA Updates ^#

Specification

Model	DL RMT (Data Logger for Cold Chain)
Display and Operator Panels^#
Display Type^#	0.96” OLED display (128×64 pixel, Yellow-Blue color)
Status Indicator^#	Status LEDs ALM LED: ALM (Red) LED blinks when Alarm condition occurs in the sensor (s) HBT LED: HBT (Red) LED blinks at data storage time, Wi-Fi wake up time
Panel Keys^#	Alarm ACK Key: Press Alarm ACK Key for approx. 1 second to Acknowledge the Alarm. Press and hold Alarm ACK Key for approx. 5 seconds to reset the device Wake-up Key : Press Wake-up Key for approx. 1 second to turn on Display and Wi-Fi wakeup.
Analog Inputs
No. of Inputs	2 Sensors^# (depends on the order code)
Remote Temperature Sensor	RTD(PT-100); Probe: diameter 5 mm, length 50 mm; spring 50 mm, 3.5-meter-long Cable
Temperature Measurement Range	-200 °C to + 200 °C
Accuracy	± 0.5 °C for the range -200 °C to + 200 °C ± 0.7 °C otherwise
Resolution	0.1 °C display and 0.01 °C for storage
Unit of Measurement	Data in °C
Ambient Temperature-Humidity Sensor	Solid state MEMS sensor^#
Operating range	-20 °C to + 60 °C (-4 °F to +140 °F) 0 to 100 %RH
Accuracy	± 0.5 °C for the range +10 °C to + 40 °C; ± 0.7 °C otherwise ± 3 %RH for the range 20 to 80 %RH ± 5 %RH otherwise
Resolution	± 0.1 °C ± 0.1 %RH
Equivalent CO2 Sensor^#	Air Quality Sensor (AQI)
Operating range	400 to 65000 ppm CO2 Equivalent
Accuracy	±50 ppm or ±10%
Resolution	1 ppm CO2 Equivalent
CO₂Sensor^#	Non-Dispersive Infrared CO₂ Sensor (NDIR)
Operating range	0–40,000 ppm Absolute CO₂
Accuracy	±50 ppm or ± 5% of reading
Resolution	1 ppm CO2
Calibration	Each device accompanies NABL (ISO/IEC 17025) traceable certificate
Alarm Details
Alarm Settings*	Programmable (Configurable) High/ Low Alarm settings for Temperature, Humidity and eCO₂/CO₂ with alarm delay (Hr:Mn) selection
Alarm Visual	ALM LED blinks for alarm High/Low condition
Alarm Audio	Buzzer will beep in alarm condition for 1 second at 15-minute store interval. For details please refer User Manual.
Alarm Acknowledgement	By pressing “ALARM ACK” for 1 second. After Alarm acknowledgement buzzer will be deactivated. For detailed operation please refer to User Manual.
Batch Details
Activation	On Power up, the data logger needs to be connected with Wi-Fi first for device activation and getting the Date and time from NTC sever.
Deactivation	Cannot be manipulated, reset or deactivated once activated
Data Recording Interval	15 minutes pre-fixed
Memory
Data Storage	Yes
Memory Type	Flash, Non-volatile, Data Retention of more than 20 years
Memory Size	Data storage of last 30 days
Memory Setting	Rollover data records
Environmental Parameters
Temperature during Transport and Storage – Device inactivated	-20 °C to + 55 °C
Temperature during operation^#	0 °C to + 60 °C (EN 12830:1999 Table 3, Climatic Type A)
Humidity during Transport, Storage and Operation	0 to 95 %RH non condensing
Altitude	< 2000 meter
Power Requirements
Power Supply	DC adapter 9-12 V DC, 2 A, 18 W
Battery	2x AA Li-ion Rechargeable Battery 3.7 V, 1100 mAh; Replaceable Battery
Battery Life	Operating life of 5 Years
Battery Backup	Upto 14 days* with recommended operating condition
User Interface
Home screen view^#	Display Header: Wi-Fi signal strength, measurement unit, Battery Level Main Body: Sensor readings
Data File Type	Json Data Objects file for data records
On site Installation	Not required
Training	Not Required. If requested, remote training Provided.
Warranty	1 year from the date of dispatch. Refer to warranty certificate for more details.
Service Provision	Replaceable parts of the data logger shall be supplied on request.
Communication Details
Communication Type	GSM/Wi-Fi/RF (refer order code)
Data Connector	Not required
Firmware update	OTA (Over The Air) upgradable
Data Upload	When on DC Supply input, the data are uploaded at every 15-minute interval and on alarm event condition.
	When on Battery Backup, the data are recorded internally, the data upload will be started after the DC supply input is resumed.
Physical characteristics
Enclosure Material	Polycarbonate Plastic: non-breakable, non-corrodible housing
Overall Dimensions (L x W x D) mm	135 (L) x 76 (W) x 27 (D)
Weight	Approx. 250 g
Mounting	Wall Mounting Bracket
Conformity Standards
Electromagnetic Compatibility	IEC 61000-6-1/6-3
Resistance to Electrical Storms	IEC 61000-6-1; (IEC 61000-4-2 Basic Standard for applicability of tests)
IP Rating	IP 30
Pollution Degree	II
Installation category	I
RoHS, Reach	Compliant (EU directive 2011/65/EU)

* If data is stored at 15-minute store interval and display is in off mode with storage and operation of the device remained inside the recommendations of the manufacturer.

# The sensor has the highest accuracy between + 5 °C to + 60 °C and 20 to 80 %RH. If the device is exposed to high humidity for a prolonged period, the measuring accuracy decreases. Prolonged exposure may introduce shift in the sensor reading with a slow recovery time. The data logger must not be exposed to a relative humidity of 100% for longer time.

# Feature depends on the options selected, please refer to order code; Specifications are subjected to change without notice.