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Tech OVN

Portable Energy Logger — Built for Energy Auditors

Titan Audit is Tech OVN's portable 3-phase 4-wire energy logger for energy auditors, ESCOs and consultants: split-core CTs from 100 A to 1000 A (5 A secondary) clamp onto live circuits without a shutdown, and it logs Class 0.5S energy and neutral current at 1-second to 60-minute intervals. CAT III rated, ₹18,000 + GST per logger.

₹18,000 + GSTPrice100 A – 1000 ACTsCAT IIISafetyShips from stockStock2 yearsWarranty
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Tech OVN Titan Audit — portable 3-phase energy logger for energy auditors
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Power Logger Buying Checklist — Titan Audit's Answers

The points to check before buying a portable energy logger for audits, answered for Titan Audit.

What to checkTitan Audit
Electrical system3-phase 4-wire, 48–500 V — covers 415 V LT supplies
Neutral currentMeasured
Current sensorsSplit-core CTs, 100 A to 1000 A (5 A secondary, Class 0.5S); clamp onto live cables, no shutdown
AccuracyClass 0.5S active energy, designed to IEC 62053-22
Logging intervalConfigurable from 1 second to 60 minutes
What it recordsV, A, kW, kVA, kVAr, power factor, kWh, kVAh, kVArh, demand; harmonics and THD to the 31st in full-metering mode
Safety ratingCAT III
Data and reportsStreams live over WiFi, Ethernet or RS485 to the Energy Intelligence Platform; PDF, Excel and CSV export
Not includedIt is not a power quality analyser: no IEC 61000-4-30 sag, swell, flicker or transient capture
Calibration and serviceMade, calibrated and serviced in Delhi NCR, with an NABL-accredited (ISO/IEC 17025) test lab
Price and terms₹18,000 + GST per logger, split-core CTs extra (100 A ₹1,825, 200 A ₹2,050 + GST each); ships from stock; 2-year warranty

Trusted by energy & industrial leaders

Tata Power — Tech OVN customerBSES — Tech OVN customerHAL — Hindustan Aeronautics — Tech OVN customerHero MotoCorp — Tech OVN customerTorrent Power — Tech OVN customerIndian Railways — Tech OVN customer

The Logger Energy Auditors Actually Take to Site

Energy audits depend on the quality of measurement. Many portable loggers ship Class 1.0 accuracy — fine for trend visualisation, but a looser class for ISO 50001 baselines, ESCO performance contracts, and M&V. The Tech OVN portable energy logger is Class 0.5S as standard, with Class 0.5S split-core CTs.

We don't do energy audits. We make the hardware audit firms take to client sites — and we sell to energy auditors, ESCOs and energy consultants. Cloud-connected logging means data streams during the survey; auditors can show findings on a tablet before leaving the site.

What the Logger Does

The capabilities that matter when the deliverable is an audit report — not a dashboard demo.

Deploy in Under 5 Minutes

Split-core CTs clamp around existing cables — no shutdown and no permanent install. Connection to live panels should always be made by a qualified person following site safety rules.

Class 0.5S Accuracy

Class 0.5S active-energy accuracy (IEC 62053-22) with Class 0.5S split-core CTs — a tighter accuracy class than the Class 1.0 common among portable loggers, which strengthens M&V data.

Load Profile & Demand

Configurable 1-second to 60-minute interval logging on-device, with running demand calculation (15-min and 30-min windows). Captures the load-profile and peak-demand data that BEE PAT and ESCO M&V deliverables require.

Cloud-Connected Out of the Box

Built-in WiFi, Ethernet, and RS485 (Modbus RTU/TCP). Audit data streams to the cloud during the survey — auditors review on a tablet at the site, generate reports before leaving.

Long-Duration Logging

On-device storage for multi-day surveys without cellular dependency. Two modes: current-only logging, or full metering including harmonics and THD to the 31st order.

Auditor-Friendly Reports

Built-in M&V report templates — energy consumption, demand profile, power factor, ECM baselines. Export to PDF / Excel / CSV.

How to Choose a Portable Energy Logger for an Indian Site Audit

  1. Accuracy class. Class 0.5S is the auditor-grade benchmark for energy consumption measurement — tighter than the Class 1.0 portable loggers commonly found at the budget end. For ISO 50001 baselines, IPMVP-aligned ESCO contracts, or BEE PAT submissions, specify Class 0.5S.
  2. Channel count and CT range. A 3-phase 4-wire logger covers most industrial loads. CT range matters — a logger supplied with 100A CTs but needing 600A or 1000A CTs on a transformer secondary means an extra purchase plus delay. Confirm CT range matches the load profile of your typical client.
  3. Logging interval and on-device storage. Most audits run 1-day, 1-week, or 1-month surveys. Configurable logging intervals (1 sec to 60 min) and on-device storage that covers your typical survey duration matter more than fancy software.
  4. Connectivity to the data platform. Cloud-connected loggers (WiFi to a phone hotspot or site WiFi; Ethernet at fixed sites; RS485 to existing BMS / SCADA) stream data during the survey. Auditors review on-site and generate reports before leaving. SD-card-only loggers slow client delivery by days.
  5. Calibration certificate. NABL-traceable is the Indian baseline; ILAC-MRA recognition is the international equivalent. The cert format matters — some clients (DISCOMs, BEE assessors, ISO 50001 auditors) require specific traceability chains.
  6. Warranty and local support. Ask how returns are handled and how long a replacement takes — cross-border RMA on imported loggers can be slow. Multi-unit audit firms care more about this than first-time buyers.
  7. Report format. Built-in PDF / Excel / IPMVP-compatible templates save reporting time. Ask any prospective supplier for a sample audit report before committing.

Note on power quality: Titan Audit logs harmonics and THD to the 31st order in full-metering mode, but it is not a power quality analyser. If the audit also requires sag, swell, flicker or transient investigation, specify a dedicated IEC 61000-4-30 device alongside the energy logger.

Who Uses Tech OVN Loggers

Our buyer is the consultant, ESCO, or in-house engineer running the audit — not the building owner.

BEE-Empanelled Energy Auditors

Independent energy auditors and energy audit firms running BEE-empanelled energy audits across India. Class 0.5S data supports EnMS / ISO 50001 audit deliverables.

ESCOs (Energy Service Companies)

ESCOs running performance contracts need pre- and post-installation M&V data. Portable loggers let one ESCO instrument multiple sites without permanent capex.

MEP & HVAC Consultants

Mechanical, electrical, plumbing and HVAC consultants verifying loads, sizing transformers, troubleshooting power factor, and validating commissioning.

Global Energy Consultants

International energy efficiency consultants operating across regions. Cloud-connected logging means client data is accessible without flying back to home office.

Industrial Plant Engineers

Plant engineering teams running internal energy audits, troubleshooting power quality issues, or validating utility bills against actual consumption.

Universities & Research Labs

Building science, energy research, and engineering programmes that need accurate, high-resolution electrical data for studies and student projects.

Logger Specifications

ParameterSpecification
Channels3-phase 4-wire (1Φ + 3Φ configurable)
Voltage Range48–500 V
Current Range100 A–1000 A (5 A secondary, Class 0.5S split-core CTs: 100, 200, 400, 600, 800, 1000 A)
Energy AccuracyClass 0.5S (IEC 62053-22)
MeasurementsV, I, active / reactive / apparent power & energy (kWh, kvarh, kVAh), demand, power factor, frequency, load profile; harmonics and THD to the 31st in full-metering mode
Logging Interval1 sec to 60 min (user-configurable)
On-Device StorageMulti-day survey capacity at typical intervals
ConnectivityWiFi + Ethernet + RS485 (Modbus RTU/TCP)
Cloud PlatformReal-time streaming + offline sync to Tech OVN Energy Intelligence Platform
OutputPDF / Excel / CSV reports; raw data via API
PowerMains-powered (no internal battery)
EnclosurePortable, IP rated for site use

Datasheet (PDF): Titan Audit energy logger datasheet

Why Auditors Choose Tech OVN

Four reasons auditors put Titan Audit on their shortlist.

Class 0.5S, Not Class 1.0

Many portable loggers are Class 1.0 — fine for trend visualisation, but a looser accuracy class for M&V or ISO 50001 baseline-setting. Titan Audit is Class 0.5S as standard.

Cloud-Connected by Default

Auditors no longer have to drive back, copy SD cards, and manually merge files. Data streams during the survey; reports can be generated and shared from the site.

Built by an Energy-Meter Manufacturer

Tech OVN has made energy meters since 2019 and is part of the OVN Engineers group (power & water, est. 1949). The portable logger uses the same metering core as our Titan DIN-rail meter, packaged for portability.

Made in India

Manufactured at our 7.5-acre Delhi NCR facility, with local support and a 2-year warranty from dispatch. We also quote for export.

Portable Energy Loggers Used in India Today

Customers evaluating portable 3-phase energy loggers — also referenced as 3 phase data loggers, portable energy audit kits, energy audit instruments, or load survey loggers — in India typically shortlist Tech OVN's Titan Audit alongside Fluke 1735, Fluke 1738, Hioki PW3360, Megger MTM3550, and EMBUILT EVL-3. Each device captures the energy consumption parameters that BEE PAT, ASHRAE Level audits, ISO 50001 baselines, and ESCO M&V workflows require — kWh, demand, power factor, voltage, and current.

Buyers in this category typically weigh a short list of decision factors: accuracy class (Class 0.5S vs Class 1.0), 3-phase channel count, split-core CT range to fit varied load sizes, logging interval and on-device storage capacity, connectivity to the data platform, calibration certificate format, and warranty plus local support in the country where the logger is being used.

Tech OVN's Titan Audit ships Class 0.5S active-energy accuracy on the same metering core as our Titan DIN-rail meter, uses Class 0.5S split-core CTs from 100 A to 1000 A (5 A secondary), and streams data over WiFi, Ethernet, or RS485 to the Energy Intelligence Platform. Built in India.

From Site Survey to Permanent Programme

When clients move from one-off audits to continuous energy programmes, the same Titan platform supports permanent meters and a multi-site dashboard. Auditors can offer clients a longer-term measurement service without changing tools.

Titan Audit — Portable Logger Detail →Permanent Energy Monitoring System (Multi-Site) →Titan PQ — Continuous Power Quality Monitor (Coming Soon) →Titan Audit vs Other Portable Loggers — Comparison →

Frequently Asked Questions

Common questions about accuracy, ISO 50001 / IPMVP compatibility, CTs, and export enquiries.

A portable energy logger — also called a portable power logger, a 3 phase energy data logger, a portable energy audit kit, an energy audit instrument, a load survey logger, or a temporary submeter — is a measurement device that auditors and consultants clamp onto live electrical circuits using non-invasive split-core CTs. It records voltage, current, power, and energy data over hours, days, or weeks without disrupting operations or requiring a permanent install. Titan Audit is sold under all of these category names depending on the buyer's reference point.
Audit deliverables — ISO 50001 baselines, ESCO performance contracts, BEE energy audit reports, ECM (energy conservation measure) verification — all rely on the measurement accuracy of the logging device. Class 0.5S is a tighter accuracy class than Class 1.0 or 2.0, whose larger permitted error can be comparable to the savings claimed on small ECMs. Note that CT accuracy also matters, which is why Titan Audit uses Class 0.5S CTs.
Yes for 3-phase 4-wire and single-phase. The logger is configured at the site for whichever topology is being measured. DC measurement requires a different sensor type — contact us for DC-specific applications.
Class 0.5S split-core CTs with a 5 A secondary, in 100, 200, 400, 600, 800 and 1000 A ratings. Choose the rating to suit the load being measured.
Yes, we quote for export. Tell us the destination country and we will confirm shipping, cloud platform access and report configuration for your region.
A permanent submeter (like our DIN-rail Titan) is wired in for continuous monitoring — best for long-term programmes. A portable logger is for surveys, audits, troubleshooting, and short-term M&V — clamped on for hours to weeks, then removed. Many energy audit firms use both: portable loggers for client engagements, and permanent meters for clients on long-term efficiency programmes.
Yes. The platform exports data to PDF, Excel, CSV, and via API to support ISO 50001, IPMVP (International Performance Measurement and Verification Protocol), and BEE EnMS workflows.
2-year warranty from date of dispatch, with calibration and firmware support. Calibration certificates are issued from our in-house calibration lab, traceable to NABL standards.
Both — the category names overlap. Indian energy auditors typically search for a portable energy audit kit or an energy audit instrument when sourcing equipment; international consultants more often use 3 phase data logger or three phase energy data logger; field engineers say power logger or energy logger. Titan Audit is built to serve all of these use cases: a portable 3 phase 4-wire energy data logger with split-core CTs from 100 A to 1000 A, Class 0.5S accuracy, on-device storage, and live cloud streaming. The same kit covers ECM baselining, ESCO M&V surveys, BEE PAT data collection, ISO 50001 readiness, and load studies — without needing a separate device per workflow.
Customers evaluating portable energy loggers in India typically look at Tech OVN's Titan Audit, Fluke 1738, Hioki PW3360, Megger MTM3550, and EMBUILT EVL-3. Titan Audit targets the same auditor-facing use cases — BEE PAT prep, ISO 50001 baselining, ESCO M&V, ASHRAE Level audits — with Class 0.5S active-energy accuracy and cloud-connected data streaming through the Energy Intelligence Platform.
Partly. In full-metering mode Titan Audit logs harmonics and THD to the 31st order alongside energy parameters (V, I, P, kWh, kvarh, demand, power factor) at Class 0.5S accuracy, which covers a harmonic check during an energy survey. It is not a power quality analyser: it does not capture voltage sags / swells, flicker or transients to IEC 61000-4-30. Tech OVN's dedicated power quality meter, Titan PQ, is coming soon; until then, use a dedicated PQ analyser for that work.
An energy logger captures energy consumption parameters — kWh, kvarh, demand, power factor, V, I — typically at Class 0.5S or Class 1.0 accuracy, and some (Titan Audit included) also log harmonics and THD. A power quality analyser focuses on disturbances — voltage events, harmonics, flicker, transients — using IEC 61000-4-30 methods. Some devices in this category combine both (Hioki PW3360 and Fluke 1738 are examples); Tech OVN keeps them separate — Titan Audit for energy surveys, and Titan PQ (coming soon) for power quality monitoring.
Yes. It is a 3-phase power logger and current logger in one device. It records per-phase current in amperes, voltage, real power (kW), power factor and energy (kWh) at Class 0.5S accuracy, logged at configurable intervals to on-device memory and the cloud. Use it as a current logger to profile a motor or feeder's amperage over time, or in full voltage + current mode as a power and energy logger — no separate handheld ammeter data logger or clamp-on current logger needed.
Yes. It ships with Class 0.5S split-core clamp-on current transformers (100 A to 1000 A, 5 A secondary) that clip around existing conductors without breaking the circuit — the same non-invasive principle as a portable AC current data logger or amperage data logger. Unlike a single-channel handheld logger with SD-card download, it logs all three phases and streams live to the cloud over WiFi or Ethernet, and it can be left installed permanently.

Trademark Notice

Tech OVN's Titan Audit is the product described on this page. Other portable energy logger products mentioned for category context — Fluke 1735, Fluke 1738, Hioki PW3360, Megger MTM3550, and EMBUILT EVL-3 — are trademarks or registered trademarks of their respective owners: Fluke Corporation; Hioki E.E. Corporation; Megger Limited; and EMBUILT Technologies. Tech OVN is not affiliated with, endorsed by, or sponsored by any of these manufacturers.

Class 0.5S audit-grade logging, cloud-connected

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