Energy sub-metering
Pulsenode C clamps on panels and motor control centers measure energy, demand, harmonics and phase imbalance circuit by circuit.
IoT Monitoring
See where the building spends its energy
Circuit-level sub-metering, compressed-air leak detection, HVAC and refrigeration health, environmental data and occupancy counts that never record a face — in one console, for one published monthly price per building.
The problem
One utility bill, a hundred causes
The monthly bill tells you how much the building used. It does not tell you that the main compressor ran loaded all weekend feeding leaks, that a dock heater spent January fighting a door left open, or that a freezer compressor has been short-cycling since its last service. The building automation system shows setpoints and alarms, but not whether the equipment behind them is healthy.
Annual energy audits help, then go stale. What facility and energy managers need is continuous data at the level where decisions are made — the circuit, the compressor, the air handler, the zone — and a short list of what to fix first.
How it works
What we monitor in a building
Compressed air
Pulsenode U ultrasound routes and permanent monitors find leaks; Pulsenode C on each compressor shows load, unload and how much it runs when the plant is idle.
HVAC health
Vibration and current on fans, pumps and air handlers reveal belt slip, bearing wear and short-cycling before comfort complaints do.
Refrigeration
Compressor cycling, defrost behavior, door-open time and temperature holds in cold rooms, with Gatepoint XT rated down to −40 °C.
Environmental monitoring
Temperature, humidity and air-quality readings from production, storage and office spaces, trended next to the equipment that controls them.
Occupancy counts
People are counted, not identified. Counting is computed on the device, and only the number leaves the sensor.
Privacy by design
Occupancy data without surveillance
Knowing how many people use a space is useful: HVAC schedules can follow real occupancy, cleaning can follow use, and space planning can rest on data instead of badge swipes. Recording video of employees to get there is neither necessary nor welcome.
Our occupancy sensing computes counts on the sensor itself. Frames are processed in memory and discarded; no images are stored or transmitted, and the Console receives only counts per zone per interval. There is no face recognition and no individual tracking. We provide signage text and a plain-language description of the system for your employees and your privacy team.
Our field note on seeing without surveillance explains the design choices in more detail.
From signal to saving
What the data typically leads to
| Signal | What it usually means | Typical action |
|---|---|---|
| Compressor power at night or weekends | Leaks, or demand nobody needs off-shift | Leak-repair route; isolate zones when idle |
| Dock-door open time against zone heating or cooling | Conditioned air leaving through open doors | Door seals, faster doors, revised procedures |
| Demand peaks by circuit | Large loads starting at the same time | Stagger start-ups to cut peak demand |
| Refrigeration compressor cycles | Short-cycling, iced coils or failing defrost | Coil cleaning, defrost settings, service call |
| Air-handler fan current and vibration | Belt slip or bearing wear | Planned belt or bearing replacement |
| Occupancy against HVAC schedule | Conditioning empty space | Align schedules with real use |
Process
From utility bills to a baseline you can measure against
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Building review
We look at utility bills, the equipment list and single-line drawings, and agree which systems are worth metering first.
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Metering plan
Panels, compressors, air handlers, refrigeration units and zones are mapped to sensors, with installation windows agreed with your facility team.
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Installation and baseline
Clamp-on and wireless sensors are installed with minimal disruption, and a baseline is recorded before any change is made, so savings can be measured rather than claimed.
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Monthly review
A monthly report ranks findings by estimated cost, tracks what was fixed, and compares each month against the baseline.
Subscription
Facility monitoring at a glance
- Price
- From $1,450 per building per month, 36-month term
- Building size
- Up to 150,000 sq ft per building subscription; larger sites are quoted
- Sensors
- Pulsenode C for electrical, Pulsenode U for ultrasound, Pulsenode W for rotating equipment, plus environmental and occupancy sensing
- Gateway
- Gatepoint, or Gatepoint XT for cold storage and outdoor equipment
- Alerts
- SMS, email, Microsoft Teams, Slack and CMMS work orders
- Data export
- CSV and Parquet, or live to historians over OPC UA and MQTT
A note on ESG reporting
Perflens exports measured, interval-level energy data by meter, system and building, with documented metering points, for your sustainability team to use. We supply the data; we don't prepare disclosures or promise compliance with any reporting framework or regulation. Your sustainability team or adviser decides how the data is used.
Honest fit
Which buildings benefit most
A good fit when
- Plants, warehouses and distribution centers with compressed air, refrigeration or large HVAC loads
- Portfolios of several buildings that need comparable data
- Sites that want occupancy data without cameras recording people
- Facility teams who want equipment health, not just energy totals
Probably not when
- Small offices where the utility's interval data already answers the question
- You need revenue-grade meters for tenant billing — use certified billing meters for that
- A building that already has full sub-metering and analytics; we would add only compressed air and equipment health
See it in context
Facility monitoring in practice
Compressed-air and energy monitoring
Ultrasound routes, permanent leak monitors and compressor metering, with compressed-air energy down about 25% in the modeled warehousing scenario.
Read more
Warehousing & logistics
Dock doors, compressors, cold rooms and conveyor drives across large, lightly staffed buildings.
Read more
Commercial facilities
Offices, campuses and mixed-use buildings where comfort, energy and occupancy have to be balanced.
Read moreFAQ
Questions we hear often
Do sensors need an electrical shutdown to install?
Usually not. Current clamps go around conductors without breaking the circuit. Voltage connections are made by a qualified electrician, often in a scheduled maintenance window.
Do the occupancy sensors record video?
No. Counts are computed on the sensor; images are not stored or transmitted, and there is no face recognition or individual tracking.
Does this replace our building automation system?
No. The building automation system keeps controlling the building. We add the equipment-level measurement it usually lacks, and can read its points where it exposes them.
Can the data support our ESG reporting?
It can supply measured energy data with documented metering points, exported as CSV or Parquet. We don't make claims about regulatory compliance; that judgement belongs to your sustainability team or adviser.
What does $1,450 per building per month cover?
Monitoring for one building of up to 150,000 sq ft on a 36-month term, including the Console and Care Essentials. The metering plan sets which systems are covered; larger buildings and campuses are quoted. See pricing.
Does it need our corporate network or the internet?
No internet connection is required. The Gatepoint can sit on its own network segment, and the Console runs on-premise.
Find out what the building does at 2 a.m.
On a discovery call we'll go through your utility bills and equipment list and point to where metering and leak detection are likely to pay first.