Competitive Cross Reference
Macromatic offers this cross-reference as a service to our customers to assist in the selection of replacement products. Every effort has been made to insure that these products are electrically and functionally equivalent to the Macromatic products except as noted. Macromatic cannot be responsible for errors of printing or corrections of data taken from published competitive data. It is the user's responsibility to insure the suitability of the substitution.
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800.238.7474
Product Specifications
SFP120A100


Use socket: 70169-D
Image may not be exact product—for reference only.
Competitor: Automation Direct
- Competitor Part #: PSFR-1C-120A
- Series: PSFR
- Macromatic Equivalent: SFP120A100
- Family: SEAL LEAKAGE RELAY
- Function: SINGLE CHANNEL
- Sensitivity Range: Sensitivity Range: 4.7K - 100K Ohms
- Input Voltage: 120V AC
- Output: 10A SPDT
Description of function:
SF Series Pump Seal Failure Relays are designed to monitor the shaft seals of submersible pumps. A resistive-measuring probe is installed in the pump seal cavity. With input voltage applied, the LED is Green ON. If the seal starts to leak, contaminating fluid enters the seal cavity, which lowers the resistance between the internal probe & the common connection. When the resistance drops below the user-adjustable sensitivity set-point of the relay, the output relay energizes & the LED turns Red ON. The relay output can be used to give an alarm indication of a leaking seal. These products will automatically reset when the fault condition clears. Probes are pulsed with a DC voltage to prevent electroplating.
Function Chart:

Application Information
- Voltage Tolerance: AC Operation: +10/-15% of nominal at 50/60 Hz.
- Load (Burden): 3 VA
- Indicator LEDs: Green ON with input voltage applied; Red ON when seal leak detected & relay is energized.
- Probe Voltage: 5V DC Pulsed
- Response Time: Pick-up & Drop-out: 1 Second
- Output Contacts: 10A @ 240V AC/7A @ 28V DC, 1/4HP @ 120V AC (N.O.)
- Life: Mechanical: 10,000,000 operations; Full Load: 100,000 operations
- Temperature: -28o to 65o C (-18o to 149o F)
- Approvals:
Dimensions
Inches (Millimeters)