Products

Sunlight Methane

Senseair Sunlight Methane is a compact NDIR sensor for reliable methane monitoring in a small, low-power format. Built on proven optical technology, it is designed for stable long-term performance in products where CH₄ measurement needs to be deployed.

Each sensor is individually factory calibrated and its solid-state design gives immunity to poisoning, maintenance-free operation and very low power consumption over time.

Defining attributes

Low-power NDIR methane sensor
0–5 %vol CH₄ measurement range
Optical sensing with immunity to poisoning
Fast response time below 30 s
Maintenance-free with ABC enabled
Long-term stable methane measurement
Individually factory calibrated
UART, Modbus and I²C communication
Continuous and single measurement modes
Configurable sampling and measurement interval
Configurable sampling and measurement interval

Sunlight Methane fits where methane measurement needs to become part of the product, not a separate instrument beside it. Its compact format, low power draw and digital communication make it practical for integration into monitoring, control and connected sensing systems where long-term stability matters.

The result is a practical methane sensing platform for products that need reliable CH₄ monitoring without adding unnecessary size, power draw or service complexity. Senseair Signature Performance, adapted for methane.

Article number	009-4-0003
Operating principle	Non-dispersive infrared (NDIR)
Measured gas	CH₄
Measurement range	0–5%vol
Accuracy	±0.25 %vol
Operation conditions	0 – 50 °C 0 – 95% RH (non-condensing)
Power supply	3.05 - 5.5 V
Peak current	95 mA
Average current	390μA
Communication	I2C, UART
Maintenance	Meintenance free
Life expectancy	> 15 years
Dimensions	34 x 21 x 12 mm (L x W x H)
Weight	5 g
Storage conditions	-40 - 85 °C

Disclaimer : Please refer to product specification for the complete technical details.

Article number	Product	Description
009-4-0002	Sunlight R290	Refrigerant sensor with fast response time and long lifetime.
009-4-0006	Sunlight R290 PH — 10.92	Sunlight R290 with 10.92 mm pin headers.
009-4-0001	Sunlight R32 & R454 A/B/C	Refrigerant sensor with fast response time and long lifetime.

Sunlight Methane

Sunlight Methane Product Specification

Documentation for all Sunrise and Sunlight versions

Product Compliance

uip5_0_0_3_42_setup

Arduino I2C & Modbus examples

Article number	Product	Description
00-0-0108	SADK Sunrise & Sunlight	Senseair Development Kit for Sunrise and Sunlight.

What is Senseair Sunlight Methane?

Senseair Sunlight Methane is a compact NDIR methane sensor for measuring CH₄ up to 5 %vol. It is designed for product engineers who need reliable methane monitoring in a low-power sensor format.

What measurement range does Sunlight Methane support?

Sunlight Methane measures methane from 0–5 %vol. The standard range is 0–1.25 %vol and the extended range is 1.25–5 %vol.

Why use NDIR for methane monitoring?

NDIR is an optical sensing principle with immunity to poisoning and strong long-term stability. This makes it suitable for methane monitoring products where dependable behaviour over time is important.

Is Sunlight Methane maintenance-free?

Sunlight Methane is designed for maintenance-free operation when ABC is enabled. Senseair recommends discussing the application with Senseair to define a proper calibration strategy.

What communication interfaces does Sunlight Methane support?

Sunlight Methane supports UART and I²C. Modbus communication is available through UART.

Is Sunlight Methane suitable for low-power products?

Yes. Sunlight Methane is built for very low power consumption and supports configurable measurement behaviour, including single measurement mode.

What is single measurement mode?

In single measurement mode, the host system triggers each measurement when needed. This gives engineers more flexibility to optimise power consumption compared with continuous measurement mode.