Vaisala RFL100 VaiNet Wireless Temperature & Humidity Data Logger


  • Industry-leading measurement precision
  • Interchangeable high-accuracy probes for T, RH, and CO2
  • 30-day memory buer
  • Typical battery life of 18 months in RH and T measurement
  • Uses standard alkaline batteries
  • Probe calibrations are traceable to SI units through national metrology institutes or accredited calibration laboratories
  • Cost-effective alternative to chart recorders

Dpstar is a leading supplier of environmental measurement sensors for temperature, relative humidity, pressure, dew point, CO2, and other environmental condition monitoring for industrial process application and research. Since the ’90s, we earned a reputation as a trusted partner to our clients through our commitment and dedication. We are an authorized distributor and supplier of measuring sensors solutions from renowned manufacturers Vaisala. Vaisala is a global leader in environmental and industrial measurement. Building on 80 years of experience, Vaisala provides observations for a better world. Vaisala is a reliable partner for customers around the world, offering a comprehensive range of innovative observation and measurement products and services.

RFL100 Data Logger uses Vaisala’s proprietary VaiNet wireless technology. It can be used to monitor temperature (T), relative humidity (RH), and carbon dioxide levels (CO2) in a wide range of environments. Suitable applications include warehouses, production areas, cleanrooms, laboratories, incubators, fridges, cold storage areas, and freezers down to −196 °C (approx. −320 °F).

RFL100 connects wirelessly to Vaisala viewLinc Monitoring System, which provides real-time trends, alarms, and historical reporting. VaiNet wireless
technology is based on the LoRa modulation technique to provide a robust wireless signal that is extremely reliable over long distances and in complex, obstructed conditions. This wireless technology allows the data logger’s signal to travel over 100 m (approx. 330 ft) indoors without the aid of signal amplifiers or repeaters. Wireless communications are encrypted to ensure data integrity and security. Measurements are updated and stored every 60 seconds and sent from the data logger every 4 minutes. In case of temporary network disruptions, the data logger can record up to 30 days of
measurements that are automatically transmitted to the viewLinc Enterprise Server software when communications are restored. Recorded data can also be downloaded directly from RFL100 through the USB port.

RFL100 requires no startup configuration, and the included mounting bracket supports several installation methods. The detailed custom display shows the latest measurement results, alarm and battery status, and signal strength of the current access point connection. The housing is classified IP54 to protect the device from dust and cleaning.


Key Benefits

Data Integrity

The RFL data loggers can record up to 30 days of measurements to the logger’s internal memory. Data recorded at the point of measurement is automatically transmitted when communications are restored and can also be downloaded directly using a USB cable.

Detachable Probe For Quick Calibration
Probes are easily changed on RFL data loggers to maintain accurate records and reliable data. The probes use Vaisala HUMICAP® Humidity and Platinum RTD sensors to provide superior stability.

Easy To Use
Able to store measurements once every 60 seconds and the detailed custom LCD provides information about current conditions, battery life, alarm, and signal status at a glance.



Networking standards Vaisala VaiNet
Modulation LoRa™ chirp spread spectrum modulation
Output power 13 dBm (20 mW)
Antenna Internal
Typical range (indoors) At least 100 m (approx. 330 ft)
Range with line-of-sight Over 500 m (1640 ft)
Frequency bands 868 MHz, 915 MHz, 920 MHz, and 922 MHz
Sample capacity 30 days (43200 samples per channel)
Memory type Non-volatile EEPROM
Memory mode Ring buer (FIFO)
Sampling rate Sampling rate
Compatible probes GMP251, HMP110, HMP110T, HMP115, HMP115T, TMP115
Batteries 2 × AA sized, 1.5 V (LR6 or FR6)
Operation time on battery power at 20 °C (68 °F)
RH and T measurement in any probe combination 18 months
CO2  measurement Typically 12 hours with lithium batteries
Compatibility Requirements
Item Required minimum version(s)
viewLinc version viewLinc Enterprise Server 5.0
Dual T probe support using Probe Splitter M8 accessory • RFL100 firmware 1.2.0
• AP10 firmware 3.0
• viewLinc Enterprise Server 5.0.2
CO2 measurement using Probe Splitter M8/M12 accessory and external power • RFL100 firmware 1.4.0
• RFL100 hardware manufactured after July 2021
• AP10 firmware 4.0 and hardware revision G
• viewLinc Enterprise Server 5.1
Operating Environment
Storage temperature −40 … +60 °C (−40 … +140 °F)
Operating humidity 0 … 100 %RH, non‑condensing
IP rating IP54
IP rating with external power supply IP20
Operating Temperature 1)
with alkaline batteries +2 … +60 °C (+35.6 … +140 °F)
with lithium batteries −20 … +60 °C (−4 … +140 °F)
with external power supply 0 … +60 °C (+32 … +140 °F)
1) Verify operating temperature specification when using third party batteries and power supplies.
EMC compatibility IEC/EN 61326‑1, industrial environment
Electrical safety IEC/EN 61010‑1
868 MHz model
EU directives and regulations RoHS Directive (2011/65/EU) amended by 2015/863
Radio Equipment Directive, RED (2014/53/EU)
Radio standards and approvals ETSI EN 300 220-2
ETSI EN 301 489-1
ICASA No: TA 2020-7761
IMDA No: DB105576
TRA No: 67584/18
Serbia: И005 21
Compliance marks AAA, CE, UKCA
915 MHz model
Radio standards and approvals Anatel ID: 04761-19-12322
AS/NZS 4268
IC ID: 23830-RFL100A
NOM ID: 1901C00493
Compliance marks ANATEL, China RoHS, NOM, NYCE, RCM
920 MHz model
Radio standards and approvals MIC ID: 012-200007
Compliance marks GITEKI
922 MHz model
Radio standards and approvals NCC ID: CCAP21LP1240T3
Compliance marks NCC
Mechanical Specifications
Housing color White
Mounting methods Screws, cable ties, hook, or magnetic mounting bracket (optional accessory)
Probe interface 4-pin female M8 connector
Service port USB 2.0 with micro-USB connector
Dimensions (H × W × D) with HMP115 probe
Without mounting bracket 158 × 62 × 31 mm (6.22 × 2.4 × 1.22 in)
With mounting bracket 186 × 68 × 36.5 mm (7.32 × 2.68 × 1.44 in)
With batteries (2 pcs alkaline) and HMP115 probe 190 g (6.7 oz)
With batteries (2 pcs alkaline), HMP115 probe, and magnetic mounting bracket 254 g (8.96 oz)
Housing PC/ABS blend
Display window PMMA (acrylic)
Sealings TPE
Requirements For External Power Supply
Output voltage 5 V DC
Output power Min. 1 W
Output connector Micro-USB
Certifications and approvals • Certified to IEC 62368-1
• Approved for use in your country


Vaisala-RFL100-VaiNet Wireless Temperature & Humidity Data Logger_DpstarGroup