Continuous Accurate Monitoring
Narrow Spectral Response - Sees UV Only

Output - 4 to 20 mA
SCADA Compatible

NIST Traceable - Optional


Spectral Response

200nm - 320nm (PW254-420-BSW)
254nm, 10nm FWHM (PW254-420-SSW)

Power requirements

8 to 24VDC, at 30mA


4 - 20mA

Cable assembly


Cable Length

25ft standard (Custom lengths available)

Shipping Weight

2 lbs. (1kg)


Stainless coupling

Probe mounting

1" FPT (Other NPT and metric sizes available)

Pressure, Max.

150 PSI / 1034 kPa


1.26" from seal to tip of probe (3.20cm) 2.95" overall length (7.49cm) 1.11" diameter (2.82cm)

• PW254 GERMICIDAL LAMP DETECTOR Sensors_UW254-360-.pdf

UVC is the most effective part of the ultraviolet spectrum for germicidal applications.  All mercury lamps, with transmissive bulb enclosures, emit considerable UVC.  The remaining 5% is distributed between UVB and visible radiation.  Medium and high pressure mercury lamps have more UVC than low pressure lamps but a decreased percentage of UVC relative to UVB. The PW254 is sensitive to UVB as well as UVC.  With low pressure mercury lamps, the UVB sensitivity of the PW254 is of little consequence.  When higher pressure mercury lamps are used, an accurate UVC reading requires a UVB blind PW254 detector, which is also available.

1 year Standard Warranty

SOLAR LIGHT COMPANY warrants that the equipment has been carefully tested, inspected and left the Factory in proper working condition, free of visible defects.  SOLAR LIGHT COMPANY warrants the equipment to be free from defects in material and workmanship, under normal use and operation, for a period of one (1) year after the date of initial operation, or demonstration; or eighteen (18) months from the date of shipment from the Factory; or whichever occurs first. The warranty is limited to the free replacement of all-defective parts and free labor during the first year of warranty.  Defective parts replaced under this warranty shall become the property of SOLAR LIGHT COMPANY. The above stated Warranty is subject to the following conditions: Equipment being installed within the United States of America, Canada, or sold by authorized SOLAR LIGHT COMPANY representatives or their agents outside the continental United States. The equipment being installed is operated and maintained in accordance with SOLAR LIGHT COMPANY’s operating instructions, maintenance instructions and specifications. Utilization of only SOLAR LIGHT COMPANY’s authorized parts and components.  The utilization of a duly authorized representative for all work performed on SOLAR LIGHT COMPANY equipment during the warranty period.  Any variation(s) to the above warranty must be in writing and mutually acceptable by SOLAR LIGHT COMPANY and the customer. The warranty shall not apply to damages resulting from errors in installation, nor shall it apply to any equipment, which has been subject to damages, alterations or misuse by the purchaser.  Parts of the equipment, which would be generally considered as expendable service items during normal use, such as fuses, lamps, detector shields, etc., are not covered under the warranty. THERE ARE NO WARRANTIES, WHICH EXTEND BEYOND THIS DESCRIPTION, AND EXPRESSLY NO IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SOLAR LIGHT COMPANY BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR ANTICIPATED LOSS OF PROFITS SUFFERED BY THE PURCHASER.