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Lauritz Knudsen SM800 Voltage Monitoring Relay · SPP, under + over voltage, neutral loss · 85-300 V AC/DC aux supply · 2 C/O · DMA220DMA220↓ 27% off MRP
BrandLauritz Knudsen
CategoryIndustrial Control
SpecificationSM800 · 3-phase 3-wire / 4-wire, digital · SPP + selectable under voltage + selectable over voltage + neutral loss (3P4W) · Power-ON delay 0-999 s, OFF delay 0.1-999 s, ON delay 0.5-999 s · Voltage 5-99 V AC (default 60 V) or 2-50% (default 10%) · 85-300 V AC/DC auxiliary supply (P-N), 2 C/O
Brand SKUDMA220
AvailabilityIn stock · ships in 24h
DeliveryPan-India · 7 working days
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Lauritz Knudsen SM800 Voltage Monitoring Relay · SPP, under + over voltage, neutral loss · 85-300 V AC/DC aux supply · 2 C/O · DMA220

₹2,465/pcincl. GST-27%
₹2,089 + 18% GST · MRP ₹3,371
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₹2,465 /pc incl. GST
Free delivery over ₹4,000

Lauritz Knudsen SM800 Voltage Monitoring Relay · SPP, under + over voltage, neutral loss · 85-300 V AC/DC aux supply · 2 C/O · DMA220: Elume price today ₹2,465 per pc incl. GST, 27% below the ₹3,371 MRP. The price has held steady for the last 30 days.

Price history
Elume price over time, day by day. Market comparison appears once we track this item.
15 Aug to 13 Nov
₹3,607₹3,190₹2,774₹2,357₹1,941₹3,371₹2,465
15 Aug2 Sep20 Sep8 Oct26 Oct13 Nov
Elume today
₹2,465
MRP
₹3,371
Lowest in view · 12 Sep
₹2,087
Highest in view · 3 Oct
₹2,465
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Brand-authorised stock with full manufacturer warranty
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Pan-India delivery
7 working days to your location
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Wholesale built in
Wholesale price at 15+ units: ₹2,342/pc on this product, applied automatically

Voltage monitoring relays from Lauritz Knudsen: single phasing preventers, phase sequence, under/over voltage and neutral loss monitoring for motor and panel protection.

  • SPP includes single phasing, phase sequence and phase unbalance monitoring with auto reset
  • Selectable ON/OFF delays on most models
  • DIN rail mounting
  • 3-phase 3-wire, 3-phase 4-wire or single-phase supply as per model
As published by Lauritz Knudsen. Verify critical parameters against the datasheet before specifying.
Lauritz Knudsen Lauritz Knudsen SM800 Voltage Monitoring Relay · SPP, under + over voltage, neutral loss · 85-300 V AC/DC aux supply · 2 C/O · DMA220 · DMA220
Device typeVoltage monitoring relay
SeriesSM800
Output contacts2 C/O
Time delayPower-ON delay 0-999 s, OFF delay 0.1-999 s, ON delay 0.5-999 s
Threshold / asymmetryVoltage 5-99 V AC (default 60 V) or 2-50% (default 10%)
Phase3-phase 3-wire / 4-wire, digital
Rated voltage85-300 V AC/DC auxiliary supply (P-N)
MountingDIN rail
BrandLauritz Knudsen
Brand SKUDMA220
ELINEHG7GGRDDJ
Sold asPer pc
Ratings as published by Lauritz Knudsen (Lauritz Knudsen price list Aug 2026). Verify critical parameters against the datasheet before specifying.
Other Lauritz Knudsen ranges and models in this category, closest in price to this one.
Is Lauritz Knudsen SM800 Voltage Monitoring Relay · SPP, under + over voltage, neutral loss · 85-300 V AC/DC aux supply · 2 C/O · DMA220 genuine and warranty-backed?

Yes. Every Lauritz Knudsen product on Elume is 100% genuine, sourced through authorised channels, and carries the manufacturer's standard warranty.

Do you deliver across India?

Yes. We deliver anywhere in India our couriers serve, usually within 5 to 7 working days from order confirmation (3 to 4 with expedited delivery on orders of Rs 10,000 and above). The delivery charge follows the order value (the GST-inclusive goods total after any discount code): ₹200 under ₹2,000; ₹100 from ₹2,000 to under ₹4,000; free from ₹4,000 to ₹25,000; ₹1,000 above ₹25,000, because large orders ship insured, often in several boxes. Heavy consignments add ₹1,000 for every started 10 kg beyond the first 10 kg of the order's total shipping weight, even when delivery is free. A free-delivery code makes the whole delivery charge zero. Every charge is shown at checkout before you pay.

Can I get a GST invoice?

Yes, on orders delivered in India. Enter your GSTIN at checkout and we issue a GST invoice with tax shown separately, so businesses can claim input tax credit.

Is there a wholesale or bulk rate?

Yes. Orders of 15 or more pcs get a wholesale price below the listed Elume price, applied automatically and shown on every product page.

What if I find it cheaper somewhere else?

Tell us. If the same Lauritz Knudsen product is listed for less, GST and delivery included, by an authorised Indian online seller, we match that price, before you order or within 7 days of ordering. The terms are on our lowest-price guarantee page.

What is the return policy?

For delivery in India, unused items in original packaging can be returned within 7 days of delivery, with free return shipping.

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