HW group is a Czech manufacturer of a Remote Monitoring Ecosystem: sensors, monitoring devices and the SensDesk portal that watch AV racks, museums, meeting rooms and data centers, and collect energy data for billing and ESG reporting.
Pick a job. Your guide puts together a device, two sensors and the portal that fit it. A starting point, not a final design.
The range · 31 products
Meet the products, with your guide
Scroll through the range. Your guide introduces every family and explains each product as it comes into view.
01 · Perseus
Perseus
Perseus units read sensors, detectors and third-party meters, evaluate the values locally with conditions, a calendar and Lua scripts, and sync everything to the Open API or a SensDesk Technology portal.
This is the Perseus line, the brains of the system. Each unit reads up to 100 meters and 1000 values, including other HWg devices on the LAN, and the LTE models keep sending SMS and call alerts when the LAN drops.
Perseus Monitoring 140
01
Mid-size LAN monitoring unit with 4 sensor ports, 4 inputs, 2 relays and a WLD zone
I/O4× DI (dry contact), 2× DO (relays), 1 WLD zone up to 185 m
ConnectivityLAN, RJ45 (100BASE-T)
Open APISNMP, XML, Modbus/TCP, MQTT
This is the one I'd put in a remote technical room or a warehouse with freezers. It reads 4 RJ11 sensors, 4 detectors and a water sensing cable, and alerts by SNMP trap or email, with SMS and calls through an external SMS gateway.
I/O4× DI (dry contact), 2× DO (relays), 1 WLD zone
ConnectivityLAN RJ45 (100BASE-T) + LTE (Global), SIM card not included
AlertsSNMP trap, email, SMS / Calls
Same 4 sensor ports and 4 inputs as the 140, but with its own LTE modem inside. If the LAN goes down it still reaches the portal, sends SMS or voice call alerts, and can serve as the SMS gateway for other HWg devices.
I/O16× DI (dry contact), 4× DO (relays), 1 WLD zone
ConnectivityLAN, RJ45 (100BASE-T)
Power9-30V (12V, 1.5A), PoE, telco standard -48V DC
This is the rack unit I'd pick for a data center or a telecom room. It sits in 1U, takes 8 RJ11 sensors, 16 detectors, Modbus/RTU meters and a water leak cable, and runs on PoE or telco -48V DC.
I/O16× DI (dry contact), 4× DO (relays), 1 WLD zone
ConnectivityLAN RJ45 (100BASE-T) + LTE (Global), SIM card not included
Power9-30V (12V, 1.5A), PoE, telco standard -48V DC
The top of the Perseus Monitoring line: the 150 rack unit plus an internal LTE modem. It reports a power failure to the portal and sends SMS or call alerts even when the LAN is gone.
Entry-level LAN gateway for RS-485 Modbus/RTU meters, no RJ11 ports and no digital inputs
MetersUp to 100 meters with 1000 variables via RS-485 (Modbus/RTU)
Meters APIHWg XML, Modbus/TCP, MQTT, SNMP
Open APISNMP, XML, Modbus/TCP, MQTT
ConnectivityLAN, RJ45 (100BASE-T)
This is the small gateway I'd use to bring third-party Modbus/RTU meters into an existing site. It has only an RS-485 port, no RJ11 and no inputs, and it converts Modbus/RTU to Modbus/TCP, MQTT or SNMP.
I/O2× DI with S0 pulse counters, 1× DO (relay), 1 WLD zone
Power24 V
This is the one for a boiler room or an energy cabinet. It reads electricity, gas, water and heat meters over M-Bus or Modbus/RTU, plus 4 RJ11 sensors, 2 pulse-counting inputs and a water leak cable, all from a 24 V supply.
I/O4× DI with S0 pulse counters, 2× DO (relays), 1 WLD zone
ConnectivityLAN RJ45 (100BASE-T) + LTE (Global), SIM card not included
The most powerful unit in the Energy family: M-Bus, Modbus/RTU, 6 RJ11 sensors, 4 pulse-counting inputs and a WLD zone on a DIN rail. Its built-in LTE modem keeps SMS and call alerts and portal backup when the LAN fails.
Poseidon2 units monitor sensors and digital I/O over LAN with secure M2M protocols (HTTPs, IPv6, SNMPv3) and work with over 50 SNMP and SCADA applications.
Here are the Poseidon2 units, the classic LAN monitoring boxes. Each one takes 1-Wire UNI sensors and dry contact detectors, switches relays, and can trigger virtual outputs on another Poseidon2 or Damocles2 across the network.
Poseidon2 3268
08
LAN monitoring unit for 8 sensors, 4 digital inputs and 2 relay outputs
Sensors8× 1-Wire UNI / 1-Wire
Inputs4× digital input with S0 pulse counters
Outputs2× Relay Output 50 V / 1 A + 8× Virtual Digital Outputs
This is the compact one I'd put in a cabinet or a small server room. It reads 8 1-Wire UNI sensors and 4 detectors, switches 2 relays, and alerts by email, SNMP trap or SMS through an SMS-GW3 gateway.
Remote environmental monitoring in a cabinet, server room or a datacenterAsk about this
Poseidon2 3468
09
LAN monitoring unit for 8 sensors and 4 inputs with 2 relays rated 230 V / 16 A
Sensors8× 1-Wire UNI / 1-Wire
Inputs4× digital input with S0 pulse counters
Outputs2× relay output 230 V / 16 A + 8× Virtual Digital Outputs
Power9 to 30 V DC, -48 V, PoE
Same 8 sensors and 4 inputs as the 3268, but the two relays switch 230 V / 16 A loads directly, so it can control a fan, a heater or a pump. It also runs from -48 V, which telco sites need.
This is the big Poseidon2 for a full server room. It takes 16 1-Wire UNI sensors plus 26 industrial sensors over RS-485, 12 detectors and 4 relays, with HTTPs, IPv6 and SNMPv3 for the security team.
Remote environmental monitoring in a cabinet, server room or a datacenterAsk about this
03 · Damocles2
Damocles2
Damocles2 units are Ethernet I/O devices: dry contact inputs with S0 pulse counters for meters and detectors, relay or open collector outputs, and the same secure M2M protocols as Poseidon2.
These are the Damocles2 I/O boxes. No analog sensors here, just digital inputs that count pulses from water, gas and electricity meters, and outputs that switch sirens, lights or remote relays.
Damocles2 MINI
11
Compact Ethernet I/O with 4 digital inputs and 2 relay outputs
Inputs4× digital input (NO/NC dry contact), 4× 32-bit pulse counter
Outputs2× relay contacts (NC-COM-NO), max. 2 A / 24 V
ProtocolsModbus/TCP, HTTP, NTP, SMTP, netGSM, HWg-PUSH, SNMP, XML
Logger250,000 records (DI, DO)
The smallest Damocles2. Four dry contact inputs with pulse counters for door contacts or meters, two relays up to 2 A / 24 V, and an email, SMS or SNMP trap when an input changes.
Industrial Ethernet I/O with 12 digital inputs and 8 open collector outputs
Inputs12× digital input (NO/NC dry contact), 12× 32-bit pulse counter
Outputs8× open collector, 50 V, max. 500 mA per output, max. 1,500 mA all outputs
ProtocolsModbus/TCP, HTTP, NTP, SMTP, netGSM, HWg-PUSH, SNMP, XML
Logger250,000 records (DI, DO)
This is the one I'd pick when I need many inputs at a low cost per pin. Twelve dry contact inputs with pulse counters, eight open collector outputs, and a 250,000 record log on board.
Industrial Ethernet I/O with 24 digital inputs, 4 relay outputs, PoE and -48 V power
Inputs24× digital input (NO/NC dry contact) with S0 pulse counters
Outputs4× relay contacts (NC-COM-NO), max. 4 A / 24 V
ProtocolsModbus/TCP, HTTP, NTP, SMTP, netGSM, HWg-PUSH, SNMP, XML
Power9 to 30 V DC, -48 V, PoE
The biggest Damocles2: 24 dry contact inputs with pulse counters and 4 relays up to 4 A / 24 V. It runs on 9 to 30 V DC, -48 V or PoE, so it fits a telco site as well as a smart building.
STE2 units are LAN and WiFi thermometers for remote locations: a temperature sensor in the package, more RJ11 sensors daisy-chained, and email alerts straight from the device or through the portal.
These are the STE2 thermometers, the easiest way to start. Plug in the included sensor, join the WiFi or LAN, and get an email when a fridge, server room or storage area drifts out of range.
STE2 LITE
14
LAN and WiFi thermometer with 1 RJ11 port for up to 4 sensor values and email alerts
This is the simplest device I have. One RJ11 port for up to 4 sensor values, a 1 m temperature sensor in the box, and an email when the temperature leaves the range; SMS and calls go through the portal or an SMS-GW3 LTE.
Simple to use server room environment monitoringAsk about this
STE2 R2
15
LAN and WiFi monitoring unit with 2 RJ11 ports for 5 sensor values and 2 digital inputs
This is the one I'd put on a pharmacy fridge or in a small IT room. Two RJ11 ports for 5 sensor values, two dry contact inputs for a door contact or smoke detector, a 3 m temperature sensor in the box, and PoE if you want no adapter.
Food / Drug storage (control of storage conditions, creation of HACCP logs)Ask about this
STE2 PLUS
16
Professional LAN and WiFi unit for 15 sensor values with SNMPv3, SNMP traps and IPv6
Sensors2 RJ11 ports, 15 sensor values in total
Digital inputs2× dry contact input
ConnectivityLAN, WiFi, PoE RJ-45
M2M Open APISNMP v1/v2, SNMP v3, XML, HWg-Push
The professional STE2. Same two RJ11 ports and two inputs as the R2, but it handles 15 sensor values and adds SNMPv3, SNMP traps, HTTPS custom certificates and IPv6 for a corporate network.
Ares units monitor up to 14 sensor values and 2 detectors over the cellular network, for locations without LAN access, with battery backup and SMS, call and email alarms sent from the device itself.
This is the Ares pair for places with no network at all: a transformer station, a greenhouse, an ATM. They talk over GSM or LTE and can call or text up to 5 numbers on their own.
Ares 12
17
GSM monitoring unit for 14 sensors and 2 dry contact inputs with battery backup
SensorsUp to 14 (1-Wire / 1-Wire UNI, RJ11), sensor distance up to 60 m
AlertsUp to 5 SMS / call numbers, up to 5 e-mail addresses, SensDesk portal
The GSM version. Up to 14 1-Wire UNI sensors on RJ11, 2 detectors, and an internal battery with up to 24 hours of backup power; it e-mails up to 5 addresses and calls or texts up to 5 numbers when a threshold is crossed.
ATMs, environment monitoring without tampering with the connectionAsk about this
Ares 12 LTE
18
LTE monitoring unit for 14 sensor values and 2 digital inputs, configured from the portal
Sensors2× RJ11 port (1-Wire UNI), up to 14 sensor values, up to 60 m
Digital inputs2× DI (dry contact) + pulse counter, up to 50 m
ConnectivityFDD LTE bands B1/B3/B5/B7/B8/B20, GSM 900/1800, SIM card not included
Alerts5× E-mail / 5× SMS+Ring (voice call from device needs 2G or 3G coverage)
The LTE version for remote sites without LAN. Up to 14 sensor values on 2 RJ11 ports, 2 inputs with pulse counters, and alerts by email, SMS or voice call, all configured remotely from HWg-cloud.com or SensDesk.
Electricity distribution networks (transformer stations, lines)Ask about this
06 · IP WatchDog2
IP WatchDog2
IP WatchDog2 units check that LAN devices are alive (PING, WEB or RS-232 heartbeat) and power-cycle them automatically when they freeze, with email, SNMP trap or SMS notification.
These are the watchdogs. If a camera, router or WiFi access point stops answering, the WatchDog2 cuts its power, brings it back and tells you by email or SMS, so nobody has to drive out to reboot it.
IP WatchDog2 Lite
19
Watchdog that monitors LAN devices by PING or WEB and restarts up to 2 of them via relay
This is the small watchdog for an IP camera or a WiFi access point. Two channels, two relay outputs, PING or WEB checks, and an email or SMS via an external SMS gateway when it has to reboot something.
Detects outages (freezing) of an IP camera and restarts itAsk about this
IP WatchDog2 Industrial
20
Industrial watchdog for 10 LAN devices, RS-232 heartbeat, 2 relays rated 110/230V 16A
Functionality detection10 LAN devices, PING, WEB, RS-232
The industrial watchdog. It supervises up to 10 devices over IP or an RS-232 heartbeat, switches two 110/230V 16A relays, and can turn on a warning light or its internal beeper when something stops responding.
Automatically restarts a switch, router or a WiFi AP in case of communication outagesAsk about this
07 · WLD2
WLD2
WLD2 is the water leak detector for standalone installations: four zones of sensing cable that react to a few drops of liquid and raise an alarm over LAN or WiFi.
This is the water leak detector I'd lay under a raised floor or along an A/C drip tray. Four cable zones, up to 185 m each, and it alarms on the first drops, or if a cable is cut.
WLD2
21
Four-zone water leak detector with sensing cables, LAN, WiFi and PoE
WLD zones4 (WLD1 to WLD4), sensing cable A / B, 4× terminal block
Cable lengthMax. 185 m / zone, extendable with up to 100 m of non-sensitive cable
Four independent zones of sensing cable, each up to 185 m, and it detects a disconnected or damaged cable too. It sends email, SNMP trap or portal alerts, and SMS or a phone call through an external SMS-GW3 LTE.
NB devices are single-purpose, battery-powered units on the NB-IoT cellular network: stick them on the wall and the data goes straight to a SensDesk Technology portal, which is mandatory for them.
These are the NB-IoT units for places with no power or network. Each has a battery good for up to 3 years and a 3-year NB-IoT SIM in the subscribed version, and the portal does all the alerting.
NB-2x1Wire
22
NB-IoT battery unit with 2 RJ11 ports for up to 4 sensor values, portal required
Sensor ports2× RJ11 (1-Wire / 1-Wire UNI), 4 sensor values in total, max. 60 m per port
ConnectivityNB-IoT, Vodafone (global) SIM, 3 years connectivity in the subscribed version
BatteryLithium 3V CR123A, up to 3 years with 1 temperature sensor
ProtocolUDP/IP (COAP)
This is the one I'd stick next to a remote fridge or in a greenhouse. Two RJ11 ports for up to 4 sensor values, a CR123A battery that lasts up to 3 years with one temperature sensor, and the portal sends the email, SMS or call.
NB-IoT battery unit that sends 2 digital inputs with S0 pulse counters to the portal
Inputs2× DI (dry contact) with S0 32-bit pulse counter, min. pulse width 20 ms
Max. distance10 m
ConnectivityNB-IoT, Vodafone (global) SIM, 3 years connectivity in the subscribed version
BatteryLithium 3V CR123A, up to 3 years / 20 °C
Two dry contact inputs with pulse counters, so it reads a door contact, a smoke detector or a water meter with S0 output where there is no LAN. The portal alerts when an input switches, or when the device goes silent.
Metering water consumption (meter with S0 pulse output)Ask about this
NB-2xOut
24
NB-IoT unit with 2 latching relay outputs controlled from the portal
Outputs2× DO (latching relays)
ControlManually from the portal or based on alarms from other devices
ConnectivityNB-IoT, subscribed version with 3 years SIM included
PowerInternal non-rechargeable battery or external power supply
This is the only NB unit that switches things. Two latching relays I can flip from the portal by hand or from an alarm on another device, powered by an internal battery or an external supply.
Control remote technology manually or based on conditionsAsk about this
NB-WLD
25
NB-IoT battery water leak detector with one sensing cable zone, portal required
WLD zones1 zone, sensing cable A / B
Cable lengthMax. 60 m
ConnectivityNB-IoT, subscribed version with 3 years SIM included
PowerInternal non-rechargeable battery or external power supply
This is the leak detector for a basement or a remote pump room with no network. One zone of sensing cable up to 60 m, an internal battery, and the portal raises the alarm by email, SMS or call.
Early water leak detection to prevent substantial damagesAsk about this
09 · Accessories
Accessories
Gateways, converters and backup power that extend the monitoring devices: one SIM for all SMS alerts, more sensors on a bus, and a UPS that reports its own status.
A few helpers I'd add to most installations. An SMS gateway so every device on the LAN can text you from one SIM, and a small UPS that keeps the unit alive and reports when mains power is gone.
SMS-GW3 LTE
26
LAN gateway with LTE modem that sends SMS alarms from all HW group devices with one SIM
This is how the LAN devices get to send SMS. One SIM card in the gateway, every Poseidon2, Damocles2, STE2 or WLD2 on the network uses it, and each device keeps its own list of phone numbers.
Central SMS gateway for all HW group devices on the same LANAsk about this
HWg-SMS-GW3
27
LAN gateway with Quad-Band GSM (2G) modem that sends SMS alarms from HW group devices
The GSM version of the SMS gateway. Same idea, one SIM for all devices plus the Nagios plug-in, with a Quad-Band GSM modem for any GSM network around the world.
GSM (2G) gateway for sending text messages (SMS) over the EthernetAsk about this
Spider
28
RS-485 converter for 4 1-Wire probes (6 values) or 4 dry contacts on a Poseidon 2250 bus
Inputs4× 1-Wire probe (temperature or humidity), 6 values at most, or 4× dry contact
OutputRS-485 bus, RJ45 (includes power)
Bus lengthUp to 1200 m (4000 ft)
Per Poseidon 2250Up to 26 probes or 4 Spider units in total
This is a bus extender for the Poseidon 2250. It carries 4 temperature or humidity probes, or 4 dry contacts, over RS-485 up to 1200 m, and one Poseidon 2250 takes up to 4 Spiders.
Connecting 1-Wire probes and dry contacts to the RS-485 bus of Poseidon 2250Ask about this
UPS 12 V
29
Compact 12 V backup power for HW group devices with a relay that signals power failure
Output12 V (double pin) / 1,5 A
Accumulator1,3 Ah
SignalingRelay 50 V / 1 A
Power supply adapter12 V / 1,5 A
A small backup battery for any 12 V HWg device. It holds 1,3 Ah, delivers up to 1,5 A, and its relay switches the moment mains power fails, so a digital input can report the outage.
Power supply back-up of small devices like monitoring switchboards, control systems, security systemsAsk about this
UPS 12 V and 5 V
30
Backup power with 12 V and 5 V outputs that reports battery status over 1-Wire UNI
Output12 V / 1,5 A + 5 V / 0,5 A
Accumulator1,3 Ah
Signaling1× 1-Wire UNI output: accumulator voltage, current, estimated operation time, adapter / accumulator status
Power supply adapter12 V / 1,5 A
The same 1,3 Ah UPS with an extra 5 V output, so it powers a 12 V and a 5 V device at the same time. Instead of a relay it plugs into a 1-Wire UNI port and reports battery voltage, current and estimated run time as sensor values.
Simultaneous power supply of appliances on both 12 V and 5 V outputsAsk about this
1-Wire UNI USB calibrator
31
USB to 1-Wire UNI transmitter with HWg-Calibrator software for calibrating sensors
HardwareHW USB / 1-Wire UNI transmitter + HWg-Calibrator software
Written to the sensorName, output unit, exponent, safe range MIN / MAX
Bus scanScan button or Autoscan every 10 seconds
This is the tool for an installer who connects industrial 0-10V or 4-20mA sensors through a 1W-UNI converter. Plug it into a PC, scan the bus, and write a 3 or 8 point calibration chart, unit and safe range into the sensor.
Connecting sensors with voltage or current output to Poseidon units via the 1-Wire UNI busAsk about this
From a single temperature sensor to hundreds of devices in one project. These are the applications HW group builds for.
01
Rack monitoring
Temperature and power failure inside the rack, energy consumption and remote I/O, with alerts by email or SMS.
Temperature, power failure
Energy consumption
Remote I/O monitoring
Email / SMS alerting
02
Remote energy monitoring / Billing
Electricity, gas, water and heat meters feed a portal, on premise or SaaS, that produces PDF reports or exports to SAP and NMS systems.
Electricity, Gas, Water, Heat and more
Portal on premise or SaaS
Extended alerting (broken water pipeline and more)
PDF reports or SAP / NMS export
03
WLD (Water Leak Detection) for Museums
A water sensing cable gives an early warning along its whole length, in several zones, and is easy to install.
Water sensing cable = early warning
Multi-zone detection
Easy to install / reliable detection
04
Warehouse monitoring
Power consumption monitoring and energy savings, backed by process oriented reports.
Power consumption monitoring
Energy savings
Process oriented reports
05
ESG data for Public buildings / Schools
Fast alerting for facility management, plus long-term environmental data that can be exported to SAP, SCADA or NMS.
Fast alerting for Facility Management
Long-term reliable environmental data analysis
Data export to SAP, SCADA, NMS
06
Remote monitoring of meeting rooms
AV rack temperature, CO2 and temperature in the room, and occupancy and utilization of the space.
AV racks temperature
Environmental monitoring (CO2, Temperature)
Occupancy & utilization monitoring
Good to know · HW group
The portal, the alerts and the open API
Portal
SensDesk / HWg-cloud
HWg-cloud.com is the free portal from HW group for basic device management and email alerts; SensDesk.com is the paid service for professionals, from a single user with a few devices to projects with hundreds of devices, with a 30 days trial. SensDesk can also be licensed for your own servers (on premise), and third-party Portal providers run SensDesk Technology portals in local languages.
HWg-cloud.com: free of charge, up to 20 devices, email alerts to 2 targets, 10 days history, 1 dashboard
SensDesk.com: paid plans for 5 / 10 / 25 or more devices, 30 / 365 / 730 days history, 30 days trial
Alerts and reports
What the portal sends you
Alerts by email, SMS and voice call (SMS and calls via SMS-GW or Twilio service), logged, escalated or solved with comments
Automatic PDF reports; history downloadable as XLS, CSV, PDF, JPG, SVG
Integration
Open API and on premise
Open API: all sensor values of the account available via SNMP or XML
Remote output control: switch relay outputs manually, by sensor value or by conditions
On premise licences: SensDesk PRO (single tenant) and SensDesk DC (multi tenant)
Works with all HW group devices on LAN, WiFi, GSM, LTE or NB-IoT; HWg Monitor app for iOS and Android