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Brand: Wolf Safety
Wolf Safety Wolflite H-4DCALED LED Handlamp
Description
Primary-cell LED handlamp for Zone 1 and Zone 2 inspection rounds
The Wolf Safety Wolflite H-4DCALED is a primary-cell LED safety handlamp for potentially explosive gas, vapour, mist and dust atmospheres. It is certified to ATEX, IECEx and UKEX for gas Zones 1 and 2 and dust Zones 21 and 22, is CE and UKCA marked, and has Lloyd’s Register type approval.
It is the LED version of the earlier H-4DCA handlamp. Wolf quotes 269 lumens measured at the source, up to 45 hours of light from four LR20 alkaline cells, and a spot beam of about 4 degrees with a lower-level fringe, which suits long-range inspection of pipework, vessels and structures. A large switch can be operated with gloved hands, and the lamp comes with a detachable shoulder strap.
Technical specifications of the H-4DCALED
| Parameter | Specification |
|---|---|
| Manufacturer | Wolf Safety Lamp Company, Sheffield, UK |
| Product reference | H-4DCALED (LED safety handlamp, primary cell powered) |
| Code (ATEX, IECEx, UKCA) | II 2GD Ex eb ib IIC T4 Gb; Ex tb IIIB T135 °C Db IP66 |
| Type of protection | Eb increased safety, ib intrinsic safety, tb protection by enclosure |
| Gas area | Zones 1 and 2; gas groups IIA, IIB, IIC; T4 |
| Dust area | Zones 21 and 22; groups IIIA and IIIB; 135 °C |
| Certificates | ATEX BAS00ATEX2176; UKEX BAS21UKEX0359; IECEx BAS 16.0076 |
| Ambient temperature | -10 to +40 °C |
| Light source | H-84 two-part LED module, 1.51 W, 269 lm at source, 25,000 hours |
| Beam | Spot about 4° with fringe light; 695 lux at 5 m |
| Power source | 4 x 1.5 V LR20 (D) primary cells to IEC 60086 (4 x H-20) |
| Light duration | Up to 45 hours |
| Enclosure / lens | Anti-static thermoplastic / 6 mm toughened glass |
| Ingress protection | IP66 |
| Weight with cells | 1.54 kg |
How it compares with a rechargeable lamp
A primary-cell lamp such as the H-4DCALED needs no charger, no charging station and no battery management programme, which is why it remains common for occasional use, spare inspection kits and remote locations. The cost is replacing four D cells after the quoted duration, whereas a rechargeable lamp such as the Wolflite XT range removes that routine.
The housing is made from an anti-static thermoplastic so that it does not accumulate a dangerous electrostatic charge, and the 6 mm toughened glass lens is sealed with a rubber seal plus a second seal at the lens ring joint to achieve IP66.
Selecting and using the lamp
Check that the plant zone, gas group and the T4 temperature class match the certificate marking before issuing the lamp. Use only the cells specified by Wolf, change them in a safe area, and keep the certificates in the equipment file. The ambient range is minus 10 to plus 40 degrees C, so it is not intended for freezer rooms or hot process areas.
Wolf also lists an IMPA code of 33 06 07 for the H-4DCALED, which helps marine buyers match the lamp to stores catalogues.
Documents and quotation
The attached document is the Wolf Safety Wolflite H-4DCALED product information sheet (SL115 DF477 issue 2). Certificates and the instruction manual are published separately by Wolf Safety.
For a quotation, send the quantity and any requirement for spare batteries or strap. For related lighting see Automation Accessories.
Datasheets & Documents
- Datasheet Wolf Safety Wolflite H-4DCALED product information sheet (SL115 issue 2) Download
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About brand
Wolf Safety is a British maker of explosion-protected portable lighting for hazardous areas, based at Saxon Road Works in Heeley, Sheffield. The business began in Leeds in the 1880s as a distributor for the German mining lamp maker Friemann & Wolf, moved to Sheffield in the early 1910s, and was incorporated in 1916 as The Wolf Safety Lamp Company under William Maurice. Its lamps are now ATEX and IECEx certified.
Seven Star LLC is an independent supplier in Muscat. We list Wolf ATEX lighting for oil and gas, petrochemical and confined space work in Oman and the GCC.
Wolf Safety company profile
| Origin | 1880s, Leeds, England |
|---|---|
| Incorporated | 30 November 1916, as The Wolf Safety Lamp Company Limited |
| Founder | William Maurice (1872–1951) |
| Headquarters | Saxon Road Works, Heeley, Sheffield, since the 1930s |
| Certification | ATEX and IECEx explosion-protected equipment |
| Product families | ATEX torches and hand lamps, LED floodlights and area lights, LED tube lights, confined space lighting, cordless and rechargeable lighting, transformers and power distribution for hazardous areas |
Milestones
- 1880s: The business starts in Leeds as a Friemann & Wolf distributor.
- 1916: The Wolf Safety Lamp Company is incorporated.
- 1930s: The company moves to Saxon Road Works, Heeley.
Wolf Safety product series
Portable lights include the Wolflite XT-70 and H-251ALED rechargeable LED handlamps, the Wolflite H-4DCALED handlamp, the HT-650 Zone 0 ATEX LED headtorch and the LinkEx WF-250XL LED floodlite for temporary area lighting.
Fixed hazardous-area luminaires include the LHX1 LED highbay, the LBX LED bulkhead and the LFX1 LED floodlight.
Equipment for hazardous areas is selected by zone and gas group: Zone 0 headtorches such as the HT-650 are used inside vessels where explosive atmospheres may be present continuously, while handlamps and floodlights serve Zone 1 and Zone 2 work. Rechargeable lamps need the matching charger, which is used in a safe area.
Where Wolf lighting is used
Tank and vessel entry, refinery and gas plant maintenance, offshore and marine areas, shutdowns and fixed lighting of Zone 1 and Zone 2 areas.
Wolf Safety products we list
Ordering Wolf lighting: what we need
Send the model, the hazardous zone and gas or dust group, the battery and charger option or supply voltage, and the mounting for fixed lights.
Facts checked against Grace's Guide, UK Companies House records and Wolf Safety's own heritage material, October 2026.
Browse Wolf Safety products by category: Automation Accessories.
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Frequently Asked Questions
What zones is the H-4DCALED certified for?
Gas Zones 1 and 2 and dust Zones 21 and 22, under ATEX, IECEx and UKEX certification.
How much light does it give?
269 lumens measured at the source, with a spot beam of about 4 degrees.
What batteries does it use?
Four LR20 (D size) alkaline primary cells, giving up to 45 hours of light.
What is its ingress protection?
IP66.
Is it marine approved?
Wolf lists Lloyd's Register type approval for the lamp.
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