FABISENSE PTH-31D and PTH-31E USB CO and Gas Alarm Buying Guide Malaysia
FABISENSE PTH-31D and PTH-31E USB CO and Gas Alarm Buying Guide Malaysia
Content
The FABISENSE PTH-31 series offers compact, USB-powered gas monitoring in two configurations. The PTH-31D measures carbon monoxide (CO), while the PTH-31E combines carbon monoxide monitoring with combustible gas detection.
For buyers in Malaysia, the main selection points are the target gas, power arrangement, alarm behaviour and installation requirements. Choosing the correct model starts with understanding the difference between CO detection and combustible gas detection.
Which PTH-31 Model Should You Choose?
Selection point PTH-31D PTH-31E
Main function Carbon monoxide monitoring Carbon monoxide and combustible gas monitoring
CO measurement range 0-1000 ppm 0-1000 ppm
Published CO accuracy 卤5 ppm or 卤10% of reading, whichever is greater 卤5 ppm or 卤10% of reading, whichever is greater
Combustible gas indication Not listed Four levels, LV1-LV4
Listed hydrocarbon gases Not applicable Methane, ethane, propane and butane
Display Digital numeric display with touch control Digital numeric display with touch control
Alert Audible alert listed Audible alert listed
Power connection USB-A USB-A
Choose the PTH-31D when your requirement is specifically carbon monoxide monitoring. Consider the PTH-31E when you also need indication of the combustible gases listed in the catalogue.
The PTH-31E provides a gas level indication alongside its CO measurement. Buyers who require a numerical combustible gas concentration should confirm the display units and reporting capability before ordering.
Carbon Monoxide and Carbon Dioxide Are Different Measurements
The catalogue identifies the models as PTH-31D (CO) and PTH-31E (CO & GAS), and its specification table lists CO measurement ranges. Some descriptive text on the same page refers to carbon dioxide, creating an inconsistency.
Based on the model labels and specification table, this series should be evaluated as CO and combustible gas alarms. A CO2 monitoring function is not established by the supplied specifications.
If your application requires carbon dioxide monitoring for ventilation or indoor air assessment, request a model with an explicitly specified CO2 measurement range.
USB Power and Practical Placement
The USB-A interface provides a compact power connection. The catalogue illustrates the device connected directly to a laptop, making the power arrangement an important part of product selection.
Before choosing a location, confirm:
- The required USB input voltage and current.
- Whether the USB port remains powered during sleep or standby.
- Whether an approved extension cable or separate USB supply can be used.
- The required mounting orientation and sensor clearance.
- Whether backup power is available.
A built-in battery is not specified in the supplied catalogue. Continuous monitoring therefore depends on confirming a suitable power source and the device's behaviour when USB power is interrupted.
Positioning should follow the manufacturer's installation instructions. A convenient USB socket may not be the correct sensing location for a particular application.
Understanding the PTH-31E Combustible Gas Function
The PTH-31E lists detection of methane (CH4), ethane (C2H6), propane (C3H8) and butane (C4H10).
Its specification describes a four-level gas indication and references 8% CH4 LEL. However, the page does not clearly define every level boundary, alarm trigger or response for each listed gas.
Before selecting this model for a specific installation, confirm the gas calibration basis, alarm thresholds and response characteristics. Do not assume that each display level represents the same concentration for every gas.
For applications requiring documented alarm performance, specify the relevant requirements when making your enquiry.
Display, Housing and Published Operating Conditions
Both models feature a digital display with touch control and a housing described as flame-retardant material.
Parameter PTH-31D PTH-31E
Published working temperature -40掳C to 70掳C -40掳C to 70掳C
Published humidity 10-90% RH 10-90% RH
Dimensions 55 x 59.5 x 23.5 mm 79.5 x 74 x 30 mm
Listed weight 32 g 151 g
Power source USB USB
The catalogue's temperature and humidity entries should be treated as operating conditions. They do not establish that either model measures or displays temperature and humidity.
Similarly, a flame-retardant housing description does not establish an explosion-proof rating or approval for hazardous areas. Confirm any application-specific certification requirements before purchase.
Selection for Malaysian Homes, Offices and Facilities
For buyers in Puchong, Selangor and Kuala Lumpur, the PTH-31 series may be considered where a small USB-powered device is required and its documented capabilities match the intended monitoring task.
Facilities buyers in Johor and Penang should also establish whether the application needs a compact local indicator, a permanently installed alarm system or an industrial gas detector with documented performance requirements.
The supplied page does not specify WiFi, Bluetooth, app connectivity, data logging or remote notifications. Include these requirements in your enquiry if readings or alarms must be accessible away from the device.
Frequently Asked Questions
What is the difference between the PTH-31D and PTH-31E?
The PTH-31D measures carbon monoxide. The PTH-31E adds combustible gas detection for the hydrocarbon gases listed in the catalogue.
Does the PTH-31 series detect CO2?
The model labels and specification table identify CO monitoring. The conflicting carbon dioxide wording should be clarified with the supplier; a CO2 function should not be assumed.
Does the PTH-31E show combustible gas concentration in ppm?
The catalogue describes a four-level gas indication. It does not clearly establish a numerical ppm display for combustible gases.
Can the device operate when the USB power is disconnected?
The supplied specifications list USB power and do not state a backup battery. Confirm power-loss behaviour before relying on continuous operation.
Is the alarm sound level specified?
An audible alert is listed, but its sound level, activation thresholds and response times are not provided on the supplied page.
Enquire About the FABISENSE PTH-31 Series
Contact MTM Precision Sdn Bhd with your target gas, intended installation location and available power source. Include any requirements for alarm thresholds, certification or continuous operation so the suitable configuration can be confirmed.
SEO Meta Description: Compare FABISENSE PTH-31D CO and PTH-31E CO and gas alarms in Malaysia. Review USB power, measurement ranges and selection with MTM Precision.
MTM Precision Sdn Bhd
Showroom & Service Centre: No. 29-1 & 29-2, Jalan Bandar 18, Pusat Bandar Puchong, 47160 Puchong, Selangor, Malaysia
Tel: 03-8080 7172
WhatsApp: +6016-660 7346
Email: mtmpre@yahoo.com
Website: www.mtmpre.com.my
23 Oct 2026
