HW group

Partner brand - Made in Czech Republic

HW group - Remote monitoring for data centres, server rooms and plant rooms

Temperature, humidity, power and leaks under control, from a single rack to an entire site

HW group s.r.o. in Prague has been developing and manufacturing a complete remote monitoring system since 2003: IP devices, more than 70 sensors and detectors and the SensDesk portal. The devices send limit alarms by e-mail, SMS or SNMP trap and connect to existing monitoring systems through open interfaces.

In the data centre HW group complements our liquid cooling range. The WLD system detects escaping conductive liquid along the full length of the sensing cable at coolant distribution units, quick couplings and pipework, while Perseus and STE2 watch temperature, humidity, doors and power in the rack and the room.

🇨🇿Manufacturer in PragueHardware, firmware and portal all come from HW group, on the market since 2003.

💧Leaks along the whole cableWLD sensing cables react to a few drops, up to 185 m per zone with extension cable.

🔌Open interfacesSNMP, Modbus, MQTT and XML depending on the device, for Checkmk, PRTG, Zabbix or building management.

📦Complete setsTset and SET packages with power adapter, sensor and cable are ready to use straight out of the box.

Selection

HW group bestsellers

View all products ->

Rack monitoring set Perseus Monitoring 150 Rack Tset with 19-inch brackets, WLD cable and door contact - HW group 600869 View product ->

Water leak set WLD2 PoE, 4 zones, LAN/WiFi, sensing cable A 2 m, connecting cable 2 m, adapter - HW group 600787 View product ->

Water leak detector WLD-ECHO set, 2 WLD zones, with sensing cable B 2+2 m, batteries and 12 V adapter - HW group 600940 View product ->

SNMP thermometer STE2 PLUS with 3 m temperature sensor and power adapter, 15 sensor values, 2 DI, SNMPv3, IPv6, PoE - HW group 600832 View product ->

Rack monitoring system Perseus Monitoring 155 Tset with LTE, temperature starter set with antenna - HW group 600865 View product ->

LAN/WiFi thermometer STE2 R2 with 3 m temperature sensor and power adapter, 2 RJ11 sensor ports, 2 DI, PoE - HW group 600753 View product ->

Rack temperature and humidity sensor 1WR-HTemp Rack19 2p, -10 to +80 °C, 0-100 % RH, 1U, 2x RJ11 - HW group 600889 View product ->

WLD sensing cable Type B set 2+2 m, 2 m sensing cable with 2 m connecting cable AB, ready to connect - HW group 600918 View product ->

Range

HW group product lines

View all products ->

Perseus Monitoring and Energy 17 products Metal housing or 19" mounting with up to 16 digital inputs, 8 sensor ports, a WLD zone and RS-485, optionally with LTE backup, plus energy gateways. STE2 IP thermometers 11 products Compact monitoring for server and plant rooms with LAN, Wi-Fi and PoE, as single units or project packs. WLD leak detection 28 products WLD2 and WLD-ECHO controllers, relay module, type A and B sensing cables, connecting and extension cables, cover strips. Temperature and humidity sensors 24 products 1-Wire and RS-485 sensors for racks, rooms, outdoor use and Pt100 measuring points. Sensor accessories and mounting 30 products Power adapters, 19" brackets, mounting plates, expanders, antennas and cables. SensDesk software and services 14 products Portal licences and cloud plans for central alarms, graphs and reports, plus installation and training.

Popular

WLD leak detection

View all products ->

Water leak detector WLD2 PoE, 4 zones up to 185 m each, LAN and WiFi, SNMP, plain unit - HW group 600717 View product ->

Water leak detector WLD-ECHO, 2 WLD zones, audible alarm, relay output, plain unit without accessories - HW group 600938 View product ->

Water leak set HWg-WLD Relay with sensor WLD Relay 1W-UNI, sensing cable A 2+2 m, J-clips, adapter - HW group 600514 View product ->

WLD sensing cable Type B set 2+10 m, 10 m sensing cable with 2 m connecting cable AB, ready to connect - HW group 600920 View product ->

WLD sensing cable Type B 2 m for leak detection, thin design, without connecting cable - HW group 600912 View product ->

WLD sensing cable Type A 10 m with connecting cable AB 2 m, total length 12 m, for leak detection - HW group 600467 View product ->

Connecting cable WLD-Connecting cable AB, 2 m, for Type A and B sensing cables, with terminator - HW group 600924 View product ->

Cover strip WLD-Cover Strip B 30, 5 m, self-adhesive, 30 mm wide, for Type B sensing cable - HW group 600917 View product ->

Buying guide

Putting together the right HW group system

Which base unit?

STE2 R2 and STE2 PLUS monitor a room with two sensor ports and two digital inputs. STE2 PLUS adds SNMPv3 and up to 15 sensor values. Perseus is built for several racks or many signals: Perseus 140 in a metal housing with 4 sensor ports, Perseus 150 for 19" racks with 8 sensor ports and 16 digital inputs. Models 145 and 155 add an LTE backup.

Plain unit or set?

Plain units come without power adapter and sensors. Tset packages include a power adapter and temperature sensor, the Perseus 150 Rack Tset also brings 19" brackets, WLD sensing cable and a door contact.

Planning leak detection

WLD2 PoE monitors 4 zones and reports via LAN or Wi-Fi, WLD-ECHO works without a network, with audible alarm and relay.
Every zone starts with a connecting cable AB with terminator, followed by sensing cable and, where needed, non-sensing extensions up to 185 m.
Type A is the rugged standard cable, type B is thinner, dries faster and can be reused. Both types fit the same connector.

Perseus devices have their own WLD zone, so rack monitoring and leak detection can run on one device.

Comparison

Which device fits?

Criterion	STE2 R2	STE2 PLUS	Perseus 140	Perseus 150	WLD2 PoE
Use	Server room, entry level	Server room, corporate network	Plant room, distribution	19" rack, data centre	Leak monitoring
Sensor ports	2 x RJ11	2 x RJ11	4 x RJ11	8 x RJ11	-
Digital inputs	2	2	4	16	-
Relay outputs	-	-	2	4	-
WLD zones	-	-	1	1	4
Network	LAN, Wi-Fi, PoE	LAN, Wi-Fi, PoE, SNMPv3	LAN	LAN, PoE or 48 V DC	LAN, Wi-Fi, PoE
With LTE backup	-	-	Perseus 145	Perseus 155	-

Good to know

HW group at a glance

2003Founded in Prague, Czech Republic

300+Items in the manufacturer range

70+Sensors and detectors

185 mWLD zone length with extension cable

FAQ

Frequently asked questions about HW group

What does HW group make?

HW group s.r.o. in Prague makes devices, sensors and software for remote monitoring. The range includes the Perseus and STE2 monitoring units, the WLD leak detection system, temperature, humidity, current and voltage sensors and the SensDesk portal.

How does leak detection with WLD sensing cable work?

The sensing cable reports conductive liquid anywhere along its length, a few drops are enough to trigger the alarm. It is laid on the floor, under a raised floor or along pipework and connected to a WLD zone input, for example on a WLD2, WLD-ECHO or a Perseus device.

What is the difference between sensing cable type A and type B?

Both detect liquid along their full length and use the same 2-pin locking connector, so they can be combined in one zone. Type B has a smaller diameter, dries faster and can be reinstalled after cleaning. Matching cover strips are available for both types.

Can the devices be integrated into Checkmk, PRTG or Zabbix?

Yes. STE2 and Perseus provide their readings via SNMP, Perseus devices also via Modbus/TCP, MQTT and XML. Alarms go out directly from the device by e-mail, SNMP trap or through an SMS gateway, no portal is required.

Do I need SensDesk?

No, the devices also work standalone. SensDesk pays off with many sites: the portal collects readings centrally, produces graphs and reports and manages devices remotely, as a cloud plan or as a licence for your own server.