SPXCDALMG1: fixed hydrogen monitoring from 0 to 1000 ppm

The Honeywell Sensepoint XCD SPXCDALMG1 is a complete fixed gas detector configured for hydrogen (H₂) measurement from 0 to 1000 ppm. Honeywell's ordering information specifies an LM25 aluminum-alloy enclosure and M20 cable entry for this exact model.

This configuration is designed for continuous area monitoring where a permanently installed hydrogen detector must connect to a plant alarm, safety or control system. It is different from the sensor-only SPXCDXSG1SS cartridge and from Modbus variants whose part numbers include an additional “M” suffix.

Verified ordering configuration

Why hydrogen requires purpose-selected fixed detection

Hydrogen is colorless and highly flammable. It is also lighter than air, so detector placement, ventilation, potential release points and ceiling geometry must be assessed by a qualified gas-detection professional. The correct detector location is application-specific; selecting the right model is only one part of a complete safety design.

Potential applications include hydrogen production and electrolyzer areas, battery rooms, fuel-cell systems, hydrogen storage or distribution, laboratories, process plants and equipment spaces where a hydrogen leak could develop. Site risk assessment determines the number and location of detectors, alarm thresholds and connection to ventilation or shutdown systems.

Sensepoint XCD features for field operation

• Local display: provides an immediate indication of gas reading and detector status.

• Non-intrusive interaction: the XCD platform supports magnetic-switch operation, helping authorized technicians access functions without opening the enclosure.

• Replaceable sensor: the plug-in cartridge supports planned maintenance of the installed detection point.

• System integration: the platform supports analog and relay-based alarm integration; the exact control-system interface must be verified for the ordered configuration.

Procurement details that must match

Similar Sensepoint XCD detectors can differ by target gas, measurement range, enclosure material, cable-entry thread, approvals and communication options. For an exact replacement, compare the complete rear nameplate—not only the yellow enclosure—with the requested SPXCDALMG1.

RFQ checklist for SPXCDALMG1

1. Quantity, delivery country and required delivery date.

2. Photo of the existing detector nameplate for replacement orders.

3. Required hydrogen range: confirm 0-1000 ppm.

4. Confirm LM25 enclosure and M20 cable entry.

5. State required approvals, outputs, alarm integration and documentation.

6. List calibration cup, gas, weather protection or mounting accessories if needed.

Final configuration, certification, accessories, availability and lead time are confirmed in the formal quotation. Installation, commissioning, bump testing and calibration must follow Honeywell's current manual and the site's approved gas-detection procedure.