GPH135T5L UV lamp Oman — 7W 135mm compact germicidal bulb for laboratory water systems

GPH135T5L UV lamp Oman

The GPH135T5L UV lamp is a 7W compact germicidal tube, 135mm long with a 4-pin base, and UV Water Systems supplies it in Oman for laboratory and point-of-use water systems. Its most common application here is as the UV source in Millipore laboratory water purification units, where the lamp handles both bacterial control and, in 185 nm variants, TOC reduction.

Laboratories in Oman running Type I and Type II water systems cannot let this lamp run past its rated life. Once UV output falls, bacterial counts and TOC drift upward, and the water no longer meets the specification the analytical method depends on. In hospital and university labs this shows up as failed blanks and irreproducible results long before anyone suspects the water system.

GPH135T5L UV lamp Oman — technical specifications

Model / ANSI code	GPH135T5L
Power	7 W
Overall length	135 mm
Base	4-pin
Lamp diameter	15 mm (T5)
Type	Low-pressure mercury, hard glass
Primary application	Laboratory water purification, point-of-use UV
Germicidal output	254 nm UV-C
Rated service life	9,000 operating hours (approx. 12 months continuous)
Supplied by	UV Water Systems — Uniqueness View LLC, Muscat, Oman

GPH135T5L UV lamp Oman — compatibility and cross-references

Millipore laboratory water purification systems
Compact point-of-use UV chambers taking a 135mm 7W lamp
Small under-sink and dispenser-mounted UV modules
Analytical and clinical laboratory water loops

Confirm whether your system requires the standard 254 nm germicidal version or a 185/254 nm dual-wavelength lamp for TOC reduction — they are the same size but do different jobs. Tell us the water system model and we will supply the correct one.

Where the GPH135T5L UV lamp Oman is used

We supply this lamp to hospital pathology and biochemistry labs, university and research laboratories, pharmaceutical quality control labs and industrial testing facilities across Oman. It is also fitted in some compact drinking water dispensers and under-sink UV modules. Delivery in Muscat is same or next day; interior and Salalah despatch is by courier.

When to replace your GPH135T5L UV lamp Oman

UV-C output decays long before the lamp stops lighting. A germicidal lamp still glowing at 15 months may be delivering well under the dose its chamber was sized for, which means the water leaving the system is no longer being disinfected to specification. Replace on hours, not on appearance. For systems running continuously, that means once every 12 months. Log the change date on the controller or on the chamber label so the next service is scheduled rather than remembered.

Handle the quartz sleeve at the same visit. Scale and iron deposits on the sleeve block UV-C just as effectively as a weak lamp, and in Oman’s high-hardness groundwater sleeves foul faster than most manufacturers’ generic guidance assumes. Clean the sleeve with a mild acid descaler, inspect the O-rings, and replace the sleeve outright every three to five years.

Standards and references

The UV dose a chamber must deliver, and the reasoning behind the annual lamp change, come from published drinking water guidance rather than from equipment marketing. The WHO Guidelines for Drinking-water Quality set out the microbiological targets disinfection is designed to meet, and the International Ultraviolet Association publishes the dose and validation practice the industry works to. We size and service UV systems in Oman against those references.

Buying GPH135T5L UV lamp Oman in Oman

UV Water Systems has supplied and serviced ultraviolet disinfection equipment across the Sultanate for more than 14 years, for hospitals, oil and gas sites, schools, hotels, food and beverage plants and villas. We stock germicidal lamps and ballasts in Muscat rather than ordering them in after a failure, so a plant that loses disinfection on a Sunday morning is not waiting three weeks for an air freight shipment.

Every lamp we supply is a named-manufacturer part with traceable 254 nm output data — the documentation health authority and HACCP auditors in Oman ask for. Our technicians cover Muscat, Sohar, Nizwa, Salalah and Duqm, and can carry out the lamp change, sleeve clean and UV intensity check as one visit under an annual maintenance contract.

Uniqueness View LLC is ISO 9001:2015 certified. Call +968 9763 7786 or email sales@waterfilteroman.com for stock availability, bulk pricing on service-contract quantities, or help identifying the correct lamp for a chamber you cannot find a part number on. Send us a photo of the old lamp and the chamber label and we will identify it for you.

7W UV Lamp

GPH135T5L 7W UV Lamp 135mm 4-Pin – Compact Germicidal Bulb | UV Water Systems Oman