HONEYWELL Gas Detector Sensor: Micro/Micro 5, BW, HONEYWELL BW, Carbon Monoxide, Sensor
The Honeywell BW Technologies Replacement Sensor (MPN D4-RHM04) is a carbon monoxide sensor for the GasAlert Micro detector series, with a measurement range of 0 to 500 ppm. This Micro 5 series sensor is designed as…
SKU 3G-OTH-554161
Need installation or engineering help?
Ask a question
Product Description
The Honeywell BW Technologies Replacement Sensor (MPN D4-RHM04) is a carbon monoxide sensor for the GasAlert Micro detector series, with a measurement range of 0 to 500 ppm. This Micro 5 series sensor is designed as a direct replacement for the 33N505 part type.
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is the Honeywell D4-RHM04 gas detector sensor used for?
The Honeywell D4-RHM04 is a carbon monoxide sensor designed for the GasAlert Micro detector series. It detects CO concentrations from 0 to 500 ppm, making it suitable for industrial safety applications in confined spaces, plant maintenance, and environmental monitoring where toxic gas exposure must be controlled.
What are the specifications of the Honeywell D4-RHM04 sensor?
The Honeywell D4-RHM04 is a Micro 5 series carbon monoxide sensor with a measurement range of 0 to 500 ppm. It is compatible with the GasAlert Micro detector models and serves as a direct replacement for the 33N505 part type. The sensor is manufactured by Honeywell under the BW Technologies sub-brand.
Where to buy the Honeywell D4-RHM04 sensor worldwide?
3G Electric supplies the Honeywell D4-RHM04 carbon monoxide sensor to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery for international orders. Contact us for pricing and lead time on this replacement sensor for GasAlert Micro detectors.
How to install the Honeywell D4-RHM04 sensor in a GasAlert Micro detector?
Installation of the Honeywell D4-RHM04 sensor should follow the GasAlert Micro detector manual. Typically, power off the unit, remove the old sensor, insert the new D4-RHM04 sensor ensuring proper alignment, and recalibrate the detector per manufacturer instructions. Always verify zero and span readings before use.
Used in
Common applications for HONEYWELLHONEYWELL Products
3G Electric supplies HONEYWELL honeywell bw technologies replacement sensors. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.


![HONEYWELL Gas Detector Sensor: BW, HONEYWELL BW, Oxygen, Sensor, 0 to 30% Measurement Range, 2 yr (MPN SR-X2V). Key specifications — Manufacturer Part Number: SR-X2V; Brand: HONEYWELL; Compatible Detector Model/Series: GasAlert Quattro; Measurement Range: 0 to 30%; Gas Detected: Oxygen; Series [NEW]: GasAlert Quattro; Sub-Brand [NEW]: BW; Part Type: Sensor.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2Fc4a855a0-1534-4c94-97d0-5e9f12e4c6a9.jpg&w=200)
![HONEYWELL Gas Detector Sensor: GasAlert Max XT, BW, HONEYWELL BW, Hydrogen Sulfide, Sensor, 2 yr (MPN SR-H-MC). Key specifications — Manufacturer Part Number: SR-H-MC; Brand: HONEYWELL; Compatible Detector Model/Series: GasAlert Max XT; Measurement Range: 0 to 200 ppm; Gas Detected: Hydrogen Sulfide; Series [NEW]: GasAlert Max XT; Sub-Brand [NEW]: BW; Part Type: Sensor.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2Fb9557f54-0512-4d16-bb36-24314cece93d.jpg&w=200)
![HONEYWELL Gas Detector Sensor: BW™ Icon/BW™ Icon+, BW, HONEYWELL BW, Hydrogen Sulfide, Sensor, 2 yr (MPN SR-H1-1S). Key specifications — Manufacturer Part Number: SR-H1-1S; Brand: HONEYWELL; Compatible Detector Model/Series: BW Icon+; Measurement Range: 0 to 200 ppm; Gas Detected: Hydrogen Sulfide; Series [NEW]: BW™ Icon+; Sub-Brand [NEW]: BW; Part Type: Sensor.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2Fb41705d4-adc9-4db7-8827-b2d6d7240678.jpg&w=200)
![HONEYWELL Gas Detector Sensor: BW, HONEYWELL BW, Chlorine, Sensor, 0 to 50 ppm, 497A81, GAXT-C-DL (MPN PS-RC10). Key specifications — Manufacturer Part Number: PS-RC10; Brand: HONEYWELL; Compatible Detector Model/Series: BW Solo; Measurement Range: 0 to 50 ppm; Gas Detected: Chlorine; Sub-Brand [NEW]: BW; Part Type: Sensor.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2Fa174a2c5-45c8-4c65-92e1-0bfcd81f449a.jpg&w=200)
![HONEYWELL Gas Detector Sensor: Micro/Micro 5, BW, HONEYWELL BW, Combustible Gas, Sensor, 33N505 (MPN SR-W04). Key specifications — Manufacturer Part Number: SR-W04; Brand: HONEYWELL; Compatible Detector Model/Series: GasAlert Micro; Measurement Range: 0 to 100% vol; Gas Detected: Combustible Gas; Series [NEW]: Micro 5; Sub-Brand [NEW]: BW; Part Type: Sensor.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2F95b772e1-1f57-489b-9d52-c928db65179a.jpg&w=200)