Vaisala viewLinc Monitoring, Alarming & Reporting Software


  • Software for continuous monitoring of temperature, humidity, and other parameters
  • Eight language versions for enterprise-wide, multi-site use
  • Preconfigured and custom reports
  • Configurable alarm notifications: email, SMS, voice calls, signal towers, browser alerts
  • Scheduled threshold alarming and alarm notification delivery times to accommodate maintenance periods or work shifts
  • Interactive tours — built-in guidance for novice users
  • Licensed features: Voice/SMS web service, third-party Modbus devices, Vaisala OPC UA Server, REST API

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.

Vaisala viewLinc Enterprise Server software allows you to network several types of Vaisala data loggers or Modbus devices, using a combination of wired and wireless connections. It supports small installations of one or two measurement points or large systems that monitor thousands of locations. Designed for regulated and critical environmental monitoring, viewLinc ensures data integrity with a secure audit trail, access controls, encryption, and authorization levels that fulfill regulatory requirements.

viewLinc runs as a Microsoft® Windows® service. If you are required to reboot your server, the viewLinc service restarts automatically. Users log in to viewLinc on any network computer or mobile device with a supported browser and can display viewLinc in several languages: English, German, French, Portuguese, Spanish, Swedish, Finnish, Chinese, and Japanese. viewLinc supports UTF-8 compliant multi-byte character sets.

System requirements

  • A dedicated server continuously available 24/7 to run viewLinc Enterprise Server software.
  • One or more Vaisala data loggers, Vaisala wireless data loggers, or Vaisala HMT300 series transmitters.
  • Vaisala cables, for connecting data loggers and setting up wireless transmitters.

Optional requirements

  • Vaisala or third-party Modbus-enabled devices
  • A dedicated or shared server to manage devices at multiple sites (running viewLinc Device Host software).
  • Remote display terminals to monitor sites without user PCs.
  • vNet, single or multi-port devices, to connect data loggers, transmitters, or probes through Ethernet.
  • Voice/SMS web service provider account (Twilio). Voice call delivery requires an Internet-accessible port (service limited in some regions).

Key Benefits

User-friendly Software, Real-time Data & Alarming
Secure web access to real-time trends and graphical overviews of all monitored locations. Receive alerts on monitored environments through email, SMS, voice calls, and alarm towers.

Data Integrity Ensured
viewLinc preserves data integrity in many ways. Months of data can be retained in data logger memory, depending on the device model and sample interval.

easy To Deploy & Use
viewLinc 5.1 and the associated measurement devices install easily to an existing network via a combination of connectivity options, including Ethernet, Power over Ethernet, Wi-Fi, or VaiNet – Vaisala’s proprietary long-range wireless technology.


Requirements Based On System Size
System size in data points 1 … 20 21 … 400 400+
Dedicated or shared server Either Either Dedicated
CPU 1.6 GHz
dual core
1.6 GHz
dual core
3.2 GHz
quad core
RAM 8 GB 12 GB 16 GB
Disk space increase/year 1.5 GB/year for 20 data points 15 GB/year for 200 data points 75 GB/year for 1000 data points
Continuous free disk space for reports 1) 2 GB 4 GB 10 GB
1) 1 month duration with 1 minute scan/sample
Server Requirements
Availability Dedicated server available 24 hours a day, 7 days a week
Server management Connected to an uninterruptible power supply (UPS)
Backup solution with support for open file backup
Synchronizes time with a Network Time Protocol (NTP) server
Operating system Windows Server® 2019
Windows Server® 2019 Datacenter Edition
Windows Server® 2016
Windows Server® 2016 Datacenter Edition
Windows Server® 2012 R2 (64-bit)
Windows® 10 Enterprise (64-bit)
Virtual server support VMWare
Application disk space 350 MB
Database disk space 1) 200 KB/data point 2)/day
Network traffic 3) Approx. 100 KB/minute/device
Web interface protocol 4) TLS 1.3
Security certificate for web interface Authorized TLS certificate and key 5)
Email encoding RFC 2047
Secure email protocol TLS 1.2
1) Not applicable to Device Host installation.
2) Data points are device channels monitoring and recording data.
3) Depends on number of devices, system configuration and type of communication devices used.
4) viewLinc 5.1 includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit.
5) viewLinc-signed certificate and key can be generated during installation.
Client Requirements
Internet browser Google Chrome™
Microsoft® Edge™
Computer clients Any network computer with a supported Internet browser, a minimum 2.4 GHz CPU, and 4 GB of RAM.
Display and tablet clients Touchscreen or mouse-operated panel with a
supported Internet browser. Must be connected to the same network as viewLinc Enterprise Server.
Wireless Device Connectivity
RFL100 series 1) Connects using Vaisala VaiNet protocol. Requires installation of an AP10 access point.
HMT140 series Connects using Wi-Fi protocol. Requires
configuration with an HMT140 configuration
300-series transmitter Connects using WLAN or LAN interface.
1) VaiNet devices not available in all regions.
Wired Device Connectivity
DL series using vNet device vNet Power-over-Ethernet devices are 802.3af compliant and work with both end-point and mid-span systems. viewLinc Aware automatically detects and configures vNet devices. 1) Requires vNet device drivers (provided).
DL series using single or
multi-port Ethernet device
Ethernet connectivity devices must be configured with static or reserved IP addresses. If the devices are being installed on different subnets, they need to be configured before being installed. Ethernet device drivers must be installed on each server used to connect Vaisala devices.
DL series using USB cable Connect devices directly to viewLinc Device Hosts using a USB-to-logger cable. Requires USB ports.
Modbus devices (RTU or
Connect devices directly to viewLinc Device Hosts using a USB-to-device cable (TCP) or Ethernet-to-serial device drivers and serial connector cables. RTU devices require serial COM ports. TCP devices require a static IP address.
Signal tower (light and/or
Connect devices according to manufacturer directions. Preconfigured device settings are selectable in viewLinc.
1) vNet devices maintain a low power rating by operating at a network speed of 10 Mbps. To ensure your network devices can operate at different speeds, set the network speed for the connected vNet port (see vNet User Guide).
Network Ports
Default Type Used by
23 TCP 300-series transmitters
80 TCP Signal towers
443 TCP viewLinc web interface
502 TCP Modbus TCP-enabled devices
771 TCP vNet and multi-port Ethernet devices
950 TCP Moxa serial-to-Wi-Fi devices
6767 UDP HMT140
12500 TCP Twilio web services
12600 TCP/UDP VaiNet access points, viewLinc Enterprise Server connection with vNet or Device Host
55000 TCP Vaisala OPC UA Server


Vaisala ViewLinc Enterprise Server Version 5.1_DpstarGroup