Brand: Honeywell

Honeywell XCD SPXCDALMG1 Hydrogen Detector 0-1000ppm

Name: Honeywell XCD Hydrogen Detector SPXCDALMG1 0-1000ppm
Brand: Honeywell

Description

Overview

The Honeywell XCD hydrogen detector SPXCDALMG1 is a fixed gas detector configured for hydrogen (H2) measurement with a full scale range of 0-1000 ppm, housed in an LM25 aluminium enclosure with M20 cable entries. It is part of the Sensepoint XCD range of loop-powered, ATEX and IECEx approved gas detectors with a local display, configurable alarms and a 4-20 mA output.

Hydrogen detection matters wherever batteries are charged, where hydrogen is used as a process gas or where hydrogen sulfide cracking is a concern. The Honeywell XCD hydrogen detector measures hydrogen at low ppm levels, giving operators early warning before flammable concentrations build up.

Engineering & Design

The Sensepoint XCD transmitter platform accepts plug-in sensors: Surecell electrochemical sensors, poison-resistant catalytic flammable sensors and infrared sensors. For hydrogen, the detector measures 0-1000 ppm with a user-selectable full scale range and default alarm points, and reports via a 4-20 mA output that can be configured as sink or source.

Alarm set points, ranges, relay behaviour and the output mode are configured through the magnetic switch interface without opening the enclosure, which keeps the certification of the detector intact during commissioning and maintenance. The detector supports the complete Sensepoint XCD range of gases, so a site standardizing on the XCD platform can stock one transmitter type and the specific plug-in sensors for each hazard. For hydrogen service, the electrochemical cell is the drop-in sensing element that gives the ppm measurement this configuration is ordered with.

Two programmable alarm relays and one programmable fault relay provide local switching, and an optional MODBUS output enables remote diagnostics and configuration. The tri-colour backlit LCD shows gas readings and icons clearly, and all configuration is done with non-intrusive magnetic switches. The housing is LM25 aluminium with 2 x M20 cable/conduit entries, rated IP66, certified for -40 °C to +75 °C.

Key Features

Honeywell XCD hydrogen detector – Sensepoint XCD, 0-1000 ppm full scale
Part number SPXCDALMG1 (LM25 aluminium, M20 entry)
4-20 mA output, selectable sink or source
2 programmable alarm relays + 1 fault relay
Tri-colour backlit LCD, non-intrusive magnetic switch configuration
ATEX, IECEx, KTL, PA and GB approvals; IP66

Applications

Hydrogen detection in battery rooms and charging areas
Process gas monitoring in refineries and chemical plants
Hydrogen monitoring in generator cooling systems
Plant-wide gas detection systems on oil and gas terminals

Specifications

Manufacturer	Honeywell Analytics
Model	Sensepoint XCD gas detector
Part number	SPXCDALMG1
Gas / range	Hydrogen (H2), 0-1000 ppm
Housing	LM25 aluminium, 2 x M20 entries
Output	4-20 mA (sink or source); optional MODBUS
Relays	2 alarm + 1 fault
Display	Tri-colour backlit LCD
Approvals	ATEX, IECEx, KTL, PA, GB
Protection / temperature	IP66 / -40 °C to +75 °C
Power	Electrochemical sensors: 3.7 W max

Compatibility

The Honeywell XCD hydrogen detector is part of the Sensepoint XCD family and uses the standard plug-in sensor interface. The transmitter can be converted to another gas by fitting the matching Sensepoint sensor; calibration accessories such as the S3KCAL calibration cup are supported.

Ordering Information

Order the Honeywell XCD hydrogen detector SPXCDALMG1 for 0-1000 ppm hydrogen monitoring. For MODBUS output add M to the part number (SPXCDALMG1M). Calibration gas for hydrogen testing is available from gas suppliers per the detector configuration.

The XCD hydrogen detector covers the 0-1000 ppm range with the catalytic sensor, and the transmitter outputs the 4-20 mA signal with the HART protocol.

The catalytic sensor of the XCD transmitter is field replaceable, and the display shows the measured value locally.

Why Seven Star LLC

Seven Star LLC supplies Honeywell gas detection equipment to plants across Oman and the GCC. The Honeywell XCD hydrogen detector is supplied.

Our engineers help you verify the exact model and revision before ordering, avoiding costly mismatches.

Confirming the Right Hydrogen Detector Configuration

The part number is the quickest way to confirm the detector. SPXCDALMG1 identifies the LM25 aluminium housing with M20 entries, and the suffix M (SPXCDALMG1M) adds the MODBUS output. When replacing or adding units, check the following:

The target gas and range on the fitted sensor label: hydrogen, 0-1000 ppm for this configuration.
The output wiring expected by the fire and gas panel: 4-20 mA sink or source, plus any relay contacts in use.
The cable entry thread and gland type, and the area classification at the mounting point.
Whether the site standard requires MODBUS for remote diagnostics.

Installation and Commissioning

Hydrogen is much lighter than air, so detectors are normally mounted high, near the ceiling or above the likely leak source. Suitable locations include battery charging rooms, the upper part of analyser houses, and areas around generator cooling systems. Avoid dead air pockets and positions exposed to direct water spray. After wiring, power the transmitter and allow the sensor to stabilise. Then use the magnetic switches to set the range, alarm levels and relay behaviour required by the cause and effect chart. Finish with a zero check and a span calibration using certified hydrogen test gas, applied through the calibration cup. Confirm each alarm and fault signal at the control panel.

Maintenance and Troubleshooting

Bump test and calibrate at the interval set by the site gas detection procedure, and keep records of the as-found readings.
Electrochemical cells have a finite life. A slow response or failed span calibration is the usual sign that the plug-in sensor needs replacement.
Other gases can cause cross-sensitivity on electrochemical cells, so an unexpected reading should be checked against the process conditions before the detector is condemned.
A fault indication on the tri-colour display should be checked against the fault list in the manual before hardware is changed.

Applications in Oman and the GCC

Battery rooms in substations and telecom shelters, hydrogen-cooled generators in power plants, and refinery units handling hydrogen-rich streams all need low-level hydrogen monitoring. The Honeywell XCD hydrogen detector is also rated for -40°C to +75°C with IP66 protection, which suits hot and dusty Gulf sites.

Supply from Seven Star LLC

Seven Star LLC supplies Sensepoint XCD transmitters, plug-in sensors and calibration accessories. Tell us the gas, range and output option, and we will confirm the correct part number before dispatch.

Request a Quote for Honeywell XCD SPXCDALMG1 Hydrogen Detector 0-1000ppm

For the Honeywell XCD hydrogen detector or any related control and instrumentation requirement, contact the Seven Star LLC team. Submit a formal inquiry through our RFQ page with your measurement range, connection and configuration, and our specialists will respond with a detailed commercial proposal and the official Honeywell documentation.

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About brand

Honeywell is the American industrial technology group whose products on this site cover gas and flame detection, pressure transmitters, flow measurement, gas metering, fire alarm systems and helicopter rotor balancing equipment. Its roots go back to a thermostat business in Minneapolis in 1885 and to Mark Honeywell's heating company, which merged with it in 1927. Several brands we list have joined Honeywell over the years: Gent fire systems of Leicester (part of Honeywell since 2005), Chadwick-Helmuth (a Honeywell business unit from 2002) and Elster gas metering (acquired around the end of 2015).

Seven Star LLC is an independent supplier in Muscat. We list Honeywell gas detectors and sensors, transmitters, Elster gas meters and flow computers, Gent fire alarm equipment and Chadwick-Helmuth balancers, and supply them and their spares in Oman and the GCC by part number.

Honeywell company profile

Origins	1885, Minneapolis (Butz thermostat business); merged with Mark Honeywell's company in 1927
Brands in our range	Honeywell Analytics gas detection, SmartLine transmitters, Elster gas metering, Gent fire detection, Chadwick-Helmuth rotor track and balance
Gent	Founded in Leicester, UK, around 1872 by John Thomas Gent; part of Honeywell since 2005
Elster	Gas, water and electricity metering; bought by Honeywell from Melrose, deal completed around the end of 2015

Milestones

1885: The Butz thermostat business starts in Minneapolis.
1927: It merges with Mark Honeywell's company.
2005: Gent fire detection (Leicester, UK) becomes part of Honeywell.
2015: Honeywell completes the purchase of Elster from Melrose around the end of the year.

Honeywell products we list

Family	Models	Typical use
Fixed gas detectors	Searchline Excel, Searchline Excel Plus, 02104-N-XSSA, Sensepoint XCD RTD, Sensepoint XCD IR, XCD H2, Sensepoint XCL, Sensepoint XRL, OmniPoint, RAEGuard 2 PID	Flammable, toxic and VOC gas detection in process areas
Sensors, flame detection and control	SR-W-MP75C LEL sensor, SR-X2V O2 sensor, FS24X Plus flame detector, R4343E flame switch, System 57 card, 5704FS panel	Replacement sensors, fire detection and gas detection control panels
Transmitters and flow	SmartLine STG700, STG800, STR82D remote seal, VersaFlow Coriolis	Process pressure and mass flow measurement
Elster gas metering	Q.Sonic plus, TRZ2, Quantometer, RABO, IRM-3 DUO, EK280, EC 350, enCore FC1, enCore ZM1, gas-net F1, gas-net D2, GasLab Q2, USM display	Gas meters, volume correction and fiscal flow computing
Gent fire alarm systems	Vigilon Plus, Vigilon Compact Plus, Nano, Xenex, S-Quad detector, S-Cubed, ALD302 base, S4-34420 interfaces, loop card, repeat panel, mimic panel, XENS-850 call point, 74430 bell	Addressable and conventional fire alarm systems in buildings and plants
Chadwick-Helmuth rotor track and balance	8500C, 8500C Plus, Vibrex 2000, Model 11, photocell system, printer, bracket, protractor	Helicopter rotor track and balance and propeller balancing

Gas detection uses two basic approaches. Point detectors such as the Sensepoint XCD measure the gas at one location, with a catalytic or infrared sensor for flammable gas and an electrochemical cell for toxic gas such as H2S. Open path detectors such as the Searchline Excel send an infrared beam across an area up to a few hundred metres long and detect a gas cloud anywhere along it. Infrared sensors cannot be poisoned the way catalytic beads can, which matters on sites with silicones or H2S.

Where Honeywell products are used

In Oman and the GCC, Honeywell gas detectors protect wellheads, gas plants, refineries and tank farms. Elster meters and flow computers measure gas at city gate stations and in industry. Gent systems are installed in commercial buildings, hospitals and hotels, and Chadwick-Helmuth balancers are used by helicopter operators.

Ordering Honeywell products: what we need

Send the part number from the label (for example 02104-N-XSSA or SPXCDASMTXF). For gas detectors, add the gas, range, output and certification. For gas meters, add size (DN), flow range and pressure rating. For Gent equipment, add the panel type and loop protocol.

Facts checked against Honeywell press releases and SEC filings, and published histories of Gent and Chadwick-Helmuth, October 2026.

Browse Honeywell products by category: Fire & Gas Detector, Vibration, Flowmeters, Pressure Instrumentation, Temperature Instrumentation.

Frequently Asked Questions

What gas does SPXCDALMG1 detect?

SPXCDALMG1 is the Honeywell XCD hydrogen detector with a full scale range of 0-1000 ppm, per the official Honeywell ordering table.

What does the part number SPXCDALMG1 mean?

The letters encode the configuration: LM25 aluminium housing (L), hydrogen 0-1000 ppm (G1) and M20 entry, with ATEX/IECEx/KTL/PA and GB approvals.

What outputs does the Sensepoint XCD provide?

A 4-20 mA output (sink or source), two programmable alarm relays, one fault relay and an optional MODBUS interface.

What is the IP rating of the Sensepoint XCD?

IP66 in accordance with EN 60529:1992, with a certified temperature range of -40 degrees C to +75 degrees C.

Can the XCD transmitter be used with other gases?

Yes, the XCD accepts plug-in Surecell electrochemical, catalytic flammable and infrared sensors, so the transmitter can be configured for different gases and ranges.

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