Please scroll down for the answers to many questions we are frequently asked by our customers. If you can’t find what you are looking for please don’t hesitate to contact us.
If you are not familiar with any of the terms or abbreviations used within the product descriptions, go to our Glossary page where, hopefully, your query will be explained.
HobSensus must be installed by a competent electrician.
Yes, it meets and exceeds the criteria for EN50615:2015.
No. PRE9279 HobSensus is for electric hobs only.
HobSensus is designed for use with single phase electric hobs. HobSensus can be used with most 2 to 6 plate electric ceramic, solid plate and induction hobs with mechanical or electronic controls up to 900mm width.
Yes. HobSensus only controls power to the hob. The hob controls operate as normal.
When HobSensus is set to Normal-Mode the red button must be pressed to activate the hob. In Auto-On mode the red button is not required to start the hob.
Estimated 2-years, dependant on usage and battery quality.
If the LEDs flash amber on first activation instead of green, this indicates the battery level is low and the batteries should be replaced.
When battery power drops below minimum level HobSensus will stop operating and the hob cannot be activated until the batteries are replaced.
Yes. A fire alarm system can be connected to HobSensus via a VFC connection.
No. HobSensus does not replace a fire alarm. HobSensus only monitors the hob it is connected to and is only active when the hob is in use.
Use a damp with a little washing up liquid to remove dirt and grease.
When the alarm is triggered the hob power is cut. Wait for cooking items to cool to a safe level. If the hob has analogue controls, for example, rotary knobs, turn all controls to the ‘off’ state. Once temperatures have reached safe levels HobSensus can be reactivated, by pressing the red button and cooking can continue.
For larger scale installations, such as multi-occupancy dwellings or student accommodation, HobSensus can be connected to the Prefect Irus central control system. Irus can monitor parameters of the unit. However, this is usage data only and is not for control of HobSensus. HobSensus must be operated locally.
No. The alarm can be temporarily silenced by pressing the red button.
The Alarm cannot be permanently disabled.
Yes. You can use any combination of cooking rings simultaneously.
HobSensus does not require the use of specific hob cookware. However, for correct functionality cookware used should be equal to or larger than the cooking ring being used. Any cookware used on hobs should be of an appropriate type for the hob.
No. HobSensus is a safety device that powers down the hob when temperatures are approaching a dangerous level. The hob must be controlled and monitored while in use.
Yes. HobSensus has 4 time-run settings – 15, 20, 30 and 120 minutes.
When cooking is complete turn off the hob using the controls on the hob. If desired, the time-run can be cancelled by holding the red button for 5 seconds. It is not mandatory to cancel the time-run.
When the pre-alarm starts sounding reduce the power level on the hob to reduce temperatures. Then press the red button to temporarily silence the sounder, if it can be safely reached. The pre-alarm will cease when temperatures drop to a safe level.
No. The Sensor Head must be mounted in the specified location to function correctly.
Yes. The Power Switching Unit must be safely isolated via a double pole isolator before being removed from its mounting box.
Yes. Before applying mains power, the circuit should be tested in accordance with regulations in force at time of installation. HobSensus must then be tested to ensure it is working correctly.
No. HobSensus is calibrated during manufacture and is ready for use after the test procedure has been completed.
No. The Sensor Head seals make the unit resistant to moisture. The unit must not be exposed to liquids.
No. The Power Switching Unit must not be exposed to moisture or liquid of any form. The Power Switching Unit must be located in a suitable location away from any liquid/moisture sources.
Yes. HobSensus needs a local means of double pole isolation. HobSensus is not an isolator.
40 Amp resistive, 9.2kW – derate for non-resistive loads.
Yes, but it’s not recomeneded. However, for the HobSensus system to function under this circumstance the tamper mode must first be disabled.
No. The Sensor Head can operate through a wireless connection, if necessary when fitted with the optional battery pack.
No. The Sensor Head operates using 5V DC supplied from the Power Switching Unit or 6VDC when using the battery pack.
The Power Switching Unit must be supplied with a suitable Earth connection. Any metal boxes used in the Power Switching Unit installation must also be Earthed.
