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Front and side of Dual Tech Occupancy Sensor, center mount 360 degrees

Dual Tech Occupancy Sensor 100 -347 VAC, center mount 360°

Wattstopper’s low profile DT-355 dual technology occupancy sensor combines the benefits of passive infrared (PIR) and ultrasonic technologies. The sensor mounts on the ceiling with a flat, unobtrusive appearance and provides 360 degrees of coverage.

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Features

Architecturally appealing low profile appearance
Ultrasonic diffusers give more comprehensive coverage
Operates at 120, 230 (single phase), 277 or 347 VAC, 50/60 Hz
Terminal wiring for quick and easy installation
Walk-through mode increases savings potential

Specifications

General Info

Color	White
Product Series	DT-355
Type	Sensor
Finish	Glossy
Application Sector	Commercial
Product Line	Wattstopper
Country Of Origin	China
Features	Adjustable Time Delay, Indicator Lights, Light Level Sensor, Sensitivity Adjustment, Test Mode, Walkthrough Mode
Included	Mounting Screws, Sensor Mask
Installation Location	Ceiling
Switch Type	Motion Sensor
Warranty Type	5-Year
Standard	UL, cUL
UPC Number	754182913848

Dimensions

Product Depth US	1.5 in
Product Height US	4.5 in
Product Volume US	44.4 cu in
Product Width US	4.5 in
Product Weight US	0.2 lb

Additional Information

Product Environmental Profile	Yes
RoHS Compliant	Yes		This product meets the material restrictions of Article 4 of the RoHS Directive (2011/65/EU), including Commission Delegated Directive 2015/863.

Technical Information

On Function	Auto On
Wire Connection Type	Flying Leads
Compatibility	BZ Power Packs, Wattstopper PLUS Sensor Interface Module
Has Battery	No
Indicator	LED Light
Indoor/Outdoor	Indoor
Input Voltage	120/230/277/347 VAC
Line Frequency	50 Hz, 60 Hz
Load Rating	1200 W @ 230-347 VAC, 800 W @ 120 VAC
Mounting Type	2-1/4 in Deep J-Box, 4 in Octagonal J-Box, Surface
Number of Buttons	0
Timer Type	DIP Switch
Timer Duration	30 Seconds, 5-30 Minutes
Operating Temperature	0°-55°C, 32°-131°F
Operating Temperature Max	131 °F
Operating Temperature Min	32 °F
Operating Humidity	5-95% RH (Non-Condensing)
Sensing Range	36 ft
Sensor Type	Occupancy
Sensor Technology	Dual Technology, Passive Infrared (PIR), Ultrasonic
Sensor Coverage	1000 sq ft
Sensor Coverage Pattern	360 deg
Sensor Mounting Height	8-12 ft
Ultrasonic Frequency	40 kHz
Storage Temperature	23° - 176° F, -5° - 80° C
Engraving Type	Blank

Resources

Is there an ambient temperature rating for the DT355? Have a customer looking for a cold temperature rated line voltage ceiling sensor. Not outdoors.

Asked by: JB

Hello JB, Please review the following information regarding the operating temperature for part DT-355. Operating Temperature 32° to 131°F (0° to 55°C) Best Regards, Technical Support

Answered by: Justin

Date published: 2023-04-03

Can a switch or relay be added to keep these on during working hours and back to normal when after working hours?

Asked by: Jeff T

Hi Jeff, Sorry no, this sensor does not allow for work hours/night control. For more advanced sensor timing control you might want to consider the DLM line of products where this is achievable.

Answered by: Tier 1 Tech Support

Date published: 2024-08-02

I’m having issues getting the DT-355 to function properly after installing a new DT-355. Can you explain the function of the (light level and the ultrasonic sensitivity) features?

Asked by: Ben19

Hi Ben, Please reach out to our tech. support team for further assistance with programming the DT-355 or refer to the resources section of each product for cut sheets and detailed instructions for activating or de-activating product features. Legrand Technical Support: Phone: 1 800-879-8585, Option 3 then Option 1 Mon - Fri: 7am - 7pm CST (excluding holidays)

Answered by: Tier 1 Tech Support

Date published: 2023-03-07

One of the answers to a question asked previously was that a DT-355 Line voltage sensor could be combined with a Radiant 0-10V dimmer on the load side. Is this correct? I am about to order this combination of devices and I want to make sure.

Asked by: John

Hello John, Yes, you can utilize a radiant 0-10v dimmer on the load side of the DT-355 sensor. Please feel free to give us a call if you would like to discuss this configuration further. legrand Contact information: Phone #: 844-957-3783 - Option 1, followed by option 2 for Technical Support. Monday - Friday | 8:00am - 6:00pm Eastern Standard Time (excluding holidays) Best Regards, Technical Support

Answered by: Justin

Date published: 2022-10-25

Can a dimmer switch be incorporated with the occupancy sensor to dim the lights when needed?

Asked by: Mike25

Yes, a line voltage switch/dimmer can be added to the load side of the DT-355.

Answered by: Tier 1 Tech Support

Date published: 2024-04-19

Do you have a sensor rated to 0F ?

Asked by: Anonymous

The CB-100 is a PIR only sensor, which can operated -40 to 95F. Please view attached SPEC sheet

Answered by: Tier 1 Tech Support

Date published: 2022-10-11

can these occupancy sensors be utilized in a cleanroom setting? specifically ISO 5-9 rated cleanrooms

Asked by: bdecker

No, our sensors are not cleanroom certified.

Answered by: Tier 1 Tech Support

Date published: 2022-06-01

What is the maximum distance the occupancy sensor can be from the ground for it to work properly

Asked by: Stephen M Ball

The DT-355 is designed for a ceiling heights of about 8-12 feet from the floor.

Answered by: Legrand Technical Support

Date published: 2022-10-11

Does this sensor cover minor motion? If so, what are the distances for that?

Asked by: JBJB

The DT-355 is a Dual-Technology sensor that has both PIR and Ultrasonic technology built in . The sensor is able to detect major and minor motion up to 1000 sqft when mounted below 10'.

Answered by: Tier 1 Tech Support

Date published: 2022-02-02

We have these thru out our warehouse, but would like the one by the entry door to stay on, is that possible?

Asked by: Anonymous

To override all sensor functions on the DT-355, set the Ultrasonic Sensitivity trimpot to the fully counterclockwise (Service) position. This bypasses the occupancy control functions of the sensor.

Answered by: Tier 1 Tech Support

Date published: 2024-11-12

Hello, is the DT-355 sensor rated for exhaust fans?

Asked by: KB311

No, the DT-355 has no rating for motor loads. I suggest looking at our BZ power packs and a 24v low voltage sensor. BZ power packs are rated for motor loads.

Answered by: Tier 1 Tech Support

Date published: 2023-06-08

Comparing with the other product Ultrasonic Ceiling Occupancy Sensor, 24VDC (W-500A), which sensors would be more suitable for a 150sq.m classroom? Comparing to its technologies, lifetime and price. Thank you.

Asked by: Nelson

Dual technology sensors are most commonly used in this application. They work using a combination of PIR and Ultrasonic technology. As individuals move throughout a given space, Ultrasonic wave analysis and the Doppler effect help detect indirect motion while passive infrared sensors monitor presence directly.

Answered by: Tier 1 Tech Support

Date published: 2021-07-26

we are looking for an occupancy sensor that will fit in a single gang electrical box. do you offer one?

Asked by: webb man

Good Afternoon, Thank you for contacting Wattstopper. We offer several sensor switch options that will fit in a single gang electrical box. Please go to our website www.legrand.us and you can search Wall Switch Sensors. We do not have an option that is a sensor only. The correct device for your situation will depend on your application and if you want a line voltage or low voltage sensor. Please let us know if we can offer any further assistance. Best Regards, Wattstopper Technical Support 800-879-8585

Answered by: Tier 1 Tech Support

Date published: 2021-07-20

Can you use two ceiling sensor in a large room ?

Asked by: SteveO

Yes, multiple ceiling sensors can be used to cover a large area.

Answered by: Legrand Technical Support

Date published: 2022-12-06

Dual Tech Occupancy Sensor 100 -347 VAC, center mount 360°

Features

Specifications

Resources

Cutsheet

Installation Instructions

CAD Drawings

Brochure

Product Environmental Profile

Reviews

Questions & Answers

Is there an ambient temperature rating for the DT355? Have a customer looking for a cold temperature rated line voltage ceiling sensor. Not outdoors.

Can a switch or relay be added to keep these on during working hours and back to normal when after working hours?

I’m having issues getting the DT-355 to function properly after installing a new DT-355. Can you explain the function of the (light level and the ultrasonic sensitivity) features?

One of the answers to a question asked previously was that a DT-355 Line voltage sensor could be combined with a Radiant 0-10V dimmer on the load side. Is this correct? I am about to order this combination of devices and I want to make sure.

Can a dimmer switch be incorporated with the occupancy sensor to dim the lights when needed?

Do you have a sensor rated to 0F ?

can these occupancy sensors be utilized in a cleanroom setting? specifically ISO 5-9 rated cleanrooms

What is the maximum distance the occupancy sensor can be from the ground for it to work properly

Does this sensor cover minor motion? If so, what are the distances for that?

We have these thru out our warehouse, but would like the one by the entry door to stay on, is that possible?

Hello, is the DT-355 sensor rated for exhaust fans?

Comparing with the other product Ultrasonic Ceiling Occupancy Sensor, 24VDC (W-500A), which sensors would be more suitable for a 150sq.m classroom? Comparing to its technologies, lifetime and price. Thank you.

we are looking for an occupancy sensor that will fit in a single gang electrical box. do you offer one?

Can you use two ceiling sensor in a large room ?

Dual Tech Occupancy Sensor 100 -347 VAC, center mount 360°

Features

Specifications

Resources

Cutsheet

Installation Instructions

CAD Drawings

Brochure

Product Environmental Profile

Related Products

Reviews

Questions & Answers

Is there an ambient temperature rating for the DT355? Have a customer looking for a cold temperature rated line voltage ceiling sensor. Not outdoors.

Can a switch or relay be added to keep these on during working hours and back to normal when after working hours?

I&rsquo;m having issues getting the DT-355 to function properly after installing a new DT-355. Can you explain the function of the (light level and the ultrasonic sensitivity) features?

One of the answers to a question asked previously was that a DT-355 Line voltage sensor could be combined with a Radiant 0-10V dimmer on the load side. Is this correct? I am about to order this combination of devices and I want to make sure.

Can a dimmer switch be incorporated with the occupancy sensor to dim the lights when needed?

Do you have a sensor rated to 0F ?

can these occupancy sensors be utilized in a cleanroom setting? specifically ISO 5-9 rated cleanrooms

What is the maximum distance the occupancy sensor can be from the ground for it to work properly

Does this sensor cover minor motion? If so, what are the distances for that?

We have these thru out our warehouse, but would like the one by the entry door to stay on, is that possible?

Hello, is the DT-355 sensor rated for exhaust fans?

Comparing with the other product Ultrasonic Ceiling Occupancy Sensor, 24VDC (W-500A), which sensors would be more suitable for a 150sq.m classroom? Comparing to its technologies, lifetime and price. Thank you.

we are looking for an occupancy sensor that will fit in a single gang electrical box. do you offer one?

Can you use two ceiling sensor in a large room ?

I’m having issues getting the DT-355 to function properly after installing a new DT-355. Can you explain the function of the (light level and the ultrasonic sensitivity) features?