Perseus Monitoring 145

Perseus Monitoring 145 is a solution for remote monitoring on site with LAN and LTE. External sensors (up to 1000 variables) - 4x RJ11 port (1W-UNI) or 1x RS-485 (Modbus/RTU). Multiple DI / DO (relay) and a WLD portLTE backup connectivity allows the device to stay operational in case of an Ethernet outage.

Perseus 145 combines data from external physical sensors / detectors with data from other HWg devices connected via LAN. Local conditions, Lua scripting, calendar or periodic scheduler help to analyze the measured data.

Email or SNMP Trap alert can be sent from the Perseus device. Measured values are available via Open API (XML, Modbus/TCP, MQTT).

Perseus Monitoring 145 can be connected to the Portal (SensDesk technology). Together with the Portal it’s a powerful solution for professional applications with Graphs, SNMP and Device Invalid Alert.

A unique feature of Perseus products is the Meters API. Perseus can read over LAN sensor values from other devices (e.g. STE2 R2) and use this data for analysis or alerting.

The Perseus Monitoring 145 unit includes a built-in LTE modem that serves as an SMS gateway for Perseus itself as well as other connected HW group devices.

  • Ethernet: RJ45 (100BASE-T); WEB: Built-in web server
  • LTE: Global
  • Sensors: 4xRJ11 port - max. 100 external sensors (1-Wire / 1-Wire UNI)
  • RJ11 sensors: Temperature, Relative Humidity (Indoor / Outdoor), Voltage, Current (0-30A or 4-20mA) and much more
  • RS-485 (Modbus/RTU): 1x terminal block
  • WLD: 1 zone for external Water Leak Detection sensing cable
  • DO (Digital Outputs): 2x DO (relays)
  • DI (Digital Inputs): 4x DI (dry contact)
  • Detectors: Smoke, door contact, fan failure detector, power presence, etc
  • Device Alerts: SNMP trap, email, SMS / Calls
  • Portal Alerts: Email, SMS / Calls, Device Invalid Alert
  • Open API: SNMP, XML, Modbus/TCP, MQTT
  • Professional product: IPv6, SNMP Traps, SNMP v3
  • Security: Radius - IEEE 802.1X, Admin and user accounts, HTTPs (customer certificate)
  • Meters API (LAN): HWg devices XML, Modbus/TCP, SNMP, MQTT
  • Data processing: Condition & Actions, Virtual sensors, Scheduler
Applications and usage: 

Typical Applications:

  • Remote machine monitoring
  • Remote environmental monitoring of warehouse / storage spaces
  • Remote monitoring of technical room (sites)
  • Remote site data concentrators of all local sensors / meters
  • Remote environmental monitoring within the cabinet or telco site
  • Pharmaceutical / warehouse environment monitoring
  • Remote base transceiver station monitoring
  • Greenhouse monitoring


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Perseus Monitoring 145 is a remote environmental monitoring device with advanced alarming, local conditions and actions. It can be used to integrate all sensors at the remote site (telco room, industrial machine or warehouse).

Perseus Monitoring 145 combines data from external physical sensors / detectors with data from other HWg devices connected via LAN. Local conditions, Lua scripting, calendar or periodic scheduler help to analyze the measured data.

The alert situation can be indicated locally by switching DO (relay outputs), sent from the device as standalone alerts (SMS, Call, Email) or analyzed & alerted from the Portal (SensDesk Technology) with Graphs, Virtual sensors, Device Invalid alerts, PDF reports or Portal account open API (SNMP / XML). Perseus device can also individually share all measured values via the Open API (SNMP, MQTT, Modbus/TCP, XML, ..)

External detectors (Dry Contact) can be connected to 4x DI (Digital Input). 
4 digital inputs can be used to connect simple detectors (open/closed contacts), a WLD zone input and 2 relay outputs that can be controlled via the device’s interface or according to the value of a connected sensor or detector, for example to control air conditioning, ventilation or automatic doors.

External water sensing cable up to 185m in total length can be connected to 1x WLD zone port (Water Leak Detection).

External sensors can be connected via 4x RJ11 ports (1W-UNI sensors from HW group) or via RS-485 (generic Modbus/RTU sensors). Perseus can also analyze sensor data from other LAN devices (Meters API: STE2 R2, generic SNMP, …).

Meters API is a unique feature of Perseus products - reading values from external LAN devices. This means that Perseus can connect via LAN to other devices on the same network and analyze their sensor data.
For example, Perseus can read the temperature at the site from its own 1W-UNI temperature sensor, compare this temperature with the temperature sensor connected to the external STE2 R2 thermometer and the temperature probe in the UPS (available via SNMP - Meter API). Alert can be triggered when at least 2 temperatures exceed critical temperature.

Internal LTE modem allows for backup connectivity to the Portal, as well as SMS and Call alerts. Alerting from the Portal is recommended, it’s reliable for LAN even with the LTE device connectivity, the user can be alerted if the device is disconnected (Device Invalid Alert). The Perseus 145 internal LTE modem can also be configured as an SMS gateway for other HW group devices.

HW group company produces a wide portfolio of external sensors - Temperature, Relative Humidity (%RH), Voltage, Current (4-20mA) and other sensors and detectors. Third party detectors (with relay output) can be connected to DI inputs. 
Third-party sensors can be connected via RS-485 (Modbus/RTU) or as LAN devices via Open API (SNMP, Modbus/TCP, MQTT).

Alerting options

A typical application example is monitoring temperatures in a remote warehouse with freezers. There are 4 temperature sensors (inside the fridge / freezers), up to 60m 1W-UNI physically connected to Perseus 145. External UPS with SNMP support can be monitored by SNMP (battery status).
Unit electronic equipment monitoring, storage rooms and industrial facilities. From simple high temperature alarms to advanced alerts (2 out of 5 sensors exceeded limit or are inaccessible, send the alert to a recipient according to internal scheduler configuration).

Standalone monitoring

  • Email alert can be sent from the device (requires SMTP server)
  • Internal LTE modem can call to defined number / send SMS message as alert 
  • Switching DO relay based on defined sensor(s) values(s)
  • Perseus Open API is available (SNMP, Modbus/TCP, MQTT, …)

Mobile App: HWg Monitor

  • Wall-mounted tablet showing all temperatures in the room / state of detectors
  • Data input: LAN devices / Portal user account
  • Android and iOS versions
  • All sensor values on one screen
  • Can be used as a sensor reading display in your pocket / on the wall

Using free of charge Portal service (

  • Perseus 145 can be easily connected via LAN
  • Email alert with high/low temperature can be sent from the Portal (long-term reliable)
  • Device Invalid (disconnected) email alert is available from the Portal
  • One value graph with short history is available
  • Alarm escalation is available (email only)
  • Remote relay output switching based on sensor 
  • Central alerts overview & management
  • Free of charge service from HW manufacturer

Using paid Portal service (Portal providers):

  • All features from are available
  • Email, SMS, Voice call alerts (from the Portal)
  • Virtual sensors in the Portal (average over several sensor, …)
  • Multigraphs with several years of history
  • User account API: SNMP or XML
  • Reports (PDF)
  • Multi-user accounts
  • (SaaS service) can be used (or any Portal Provider)
  • SensDesk Portal On-Premise - You can run your own portal on your server


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