Series DLD Dual Channel Leak Detection Relay

Shaft Seal Leak Protection

Series DLD Dual Channel Leak Detection Relay is used to monitor the shaft seals of two submersible pumps to detect a leak before pump failure. A leak is detected by sensing the status of a float or conductivity switch installed in the seal cavity. When this resistance drops below the set sensitivity, the output relay energizes and the corresponding LED indicator illuminates. The DLD offers normally open relay contacts to energize an alarm or de-energize the pump in the event of a leak. When the seal failure condition clears, the relay automatically resets.

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

COVID-19 Update: Due to high customer demand, lead time on some products may be up to two weeks. While this is a developing health situation, we are working continuously to take the necessary measures to ensure that the products you need are available with minimal interruption.

Model Description Usually Ships* Price Code Order
Ships: 1-2 Weeks
Price: $202.00
Dual channel leak detection relay, 10k to 25k ohm adjustable. 1-2 Weeks* $202.00 N Order
Ships: Consult Factory
Price: $202.00
Dual channel leak detection relay, 4.7k to 100k ohm adjustable. Consult Factory* $202.00 N Order


Power Requirement:
120 VAC, 50/60 Hz.
Power Consumption:
2 VA (approximate).
Isolation Voltage:
2500 V.
Temperature Limits:
Operating: -4 to 131°F (-20 to 55°C); Storage: -40 to 185°F (-40 to 85°C).
Switch Type:
(2) N.O. SPST.
Switch Voltage:
9 VDC.
Electrical Rating:
5 A @ 120 VAC resistive, 345 VA inductive.
Response Times:
Energize: 6 ms (approximate); Release: 2.5 ms (approximate).
Respective red LED illuminates when leak is detected.
Polycarbonate dust cover.
8-pin octal.
8 oz (227 g).
Agency Approvals:
cUR, UR.

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