ALOGY tools
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For technicians, instrument techs, electricians and engineers

Tools and technical content for people who work in industry

Every result comes explained: what it means, whether it is within range and what to set in the device.

See plans and subscribeUse the free 4–20 mA calculator

Also free, no sign-up: whole-house cables and breakers based on NBR 5410

Yearly plan: R$149 per year (R$12.42 per month), 37% cheaper than monthly.

  • Built for the phone, in the field
  • PDF reports, with no advertising
  • Portuguese, English and Spanish

See it working

Drag the level. The transmitter responds.

Open tank example: 3 m of water with the LP tap open to atmosphere. DP and the 4–20 mA signal change instantly.

Level
40%
DP
11.77 kPa
Signal
10.4 mA

With a subscription

  • Dry leg and wet leg, including negative ranges
  • LRV and URV to set in the transmitter, with densities and tap offset
  • PDF report to attach to the job
Installation diagramTank with the 0% and 100% levels, the HP tap and the transmitter at the heights entered from the bottom. In a closed tank, the LP tap is in the vapor space, above 100%.100% · URV50%0% · LRV40%HP tap · 0 mAtmosphere10.4 mADPHPLPLevel: 1.2 m from the bottom0% = 0 m · 100% = 3 mTransmitter: 0 m

Drag the level in the tank or use the slider below. In an open tank, LP references atmosphere. Heights to the tank scale; the rest of the drawing is illustrative.

App

The tools on your phone, even without internet.

Install the app on the home screen of your phone or computer. It opens full screen and, after you download the tools in the dashboard, works with no signal in the field.

  • Opens from the home screen, full screen
  • Works without internet after downloading the tools
  • PDF reports made on the device itself
Open the tools dashboard
DP range on a phone: tank, LRV, URV and a 12 mA current.
PID tuning on a phone: process response and controller output.
ALOGY Tools subscription

Every tool in one subscription.

Same tools in both plans. Choose how you prefer to pay.

  • Every tool: signals, sensors, PID tuning and calibration sheets
  • PDF reports and sheets with your name and logo, no advertising
  • On phone and computer, in Portuguese, English and Spanish
  • Work kept in your account, opened on your phone and computer

Pix or card. 7 days to withdraw with a full refund. Free 4–20 mA calculator · Free residential cable sizing

PID tuning

Press Play and watch the loop respond.

In the tool, you adjust the tuning while the loop runs and take the values to your PLC.

Explore PID tuning

Teaching simulation of a furnace (first-order model with dead time); it does not represent a specific plant.

SPPVMV
708090100110050100050010001500s°CMV %

Press Play: the SP changes to 100 °C and the controller reacts.

Tools

Every tool answers a field question.

Signals and scaling Free

4–20 mA calculator

What does this current mean in the process?

Process control

PID tuning

Which Kp, Ti and Td should go into the PLC?

Level and pressure

DP level range

Which LRV and URV should go into the DP transmitter?

Temperature

PT100 calculator

How many ohms should I read at this temperature?

Temperature

Thermocouple calculator

How many mV match this temperature?

Data collection and calibration

Temperature calibration sheet

How do I record this sensor calibration?

Data collection and calibration

Pressure calibration sheet

How do I take the pressure points to the field?

Data collection and calibration

pH calibration sheet

How do I document buffers and readings?

Data collection and calibration

Flow calibration sheet

How do I compare the meter with the reference?

Data collection and calibration

Weighing instrument calibration sheet

How do I organise the weighing instrument tests?

Other industrial tools

Mechanics, fluids, gases, electrical and conversions, to the same standard: formula in view, PDF and work saved on your device or in your account.

Power electrical Free

Residential cable sizing

Which cable, breaker and RCD for each circuit of the house?

Conversions Free

Industrial unit converter

What is this pressure in another unit?

Gases

Gas flow normalization

How many Nm³/h flow at these operating conditions?

Gases Free

ppm ↔ mg/m³ for gases

How many mg/m³ are these ppm?

Fluids and piping

Tank volume

How much product is in the tank at this level?

Fluids and piping Free

Flow × velocity × diameter

What pipe diameter suits this flow?

Fluids and piping

Pipe pressure drop

How much pressure does the line use up?

Power electrical

Industrial cable sizing

Which cable and breaker does this load need?

Mechanics and drives Free

RPM, pulleys and gear reduction

What speed comes out of this pulley?

Mechanics and drives

Fan and blower power

What motor does this fan need?

Mechanics and drives

Bearing fault frequencies

At what frequency does the bearing fault show up?

4–20 mA

The reading comes with a diagnosis.

  • 12.43 mA = 52.7% of range ≈ 263.4 °C, in one sentence.
  • Negative current? Check the polarity. Zero? Look for an open loop, missing supply or a fuse.
  • LL, L, H and HH thresholds in engineering units, including reverse scales.
  • Optional failure reading per the NAMUR NE 43 recommendation, when the transmitter uses it.
Try the 4–20 mA calculator

Calibration sheets

A field sheet for those who calibrate and check instruments.

  • Pressure from 0 to 10 bar, 5 points, up and down, 3 readings: the sheet is built from the range.
  • Before and after the adjustment in the same sheet, with the error of each point side by side.
  • History by TAG: the next collection of the same instrument starts from the last saved sheet.
  • Readings in CSV for the spreadsheet; pasting from the spreadsheet fills the sheet.
  • On the phone, also without signal, and a PDF with your company name.

It is a data sheet: the calibration certificate is still the laboratory’s.

See the pressure sheet

Why ALOGY Tools

Results you understand, check and record.

An AI chat helps you understand a concept. When you have to deliver the number, you need the right table from the standard, the criteria checked together and a document to file: that is what each tool does, the same way every time.

Understand what the number means

Within range, saturation, transmitter failure or reversed polarity: the reading comes with a field interpretation, not just a value.

Set up in the device’s convention

LRV and URV for the DP transmitter, and Kp, Ti and Td in the form, unit and scale your PLC or controller uses.

Document without rework

PDF reports and data sheets, with no logo or advertising, ready to attach to the customer’s job.

Technical references

Thermocouples from the NIST ITS-90 coefficients, checked against the official tables; PT100 by Callendar–Van Dusen and IEC 60751 classes.

Assumptions in plain sight

Formulas and assumptions on every screen, automated tests for every calculation. An empty field never becomes zero, and “within range” is not a calibration pass.

Your data, your device

Calculations on your device; the work stays in the browser, with a backup file, and goes to your account only when you save it there.

See official values side by side with the tools’ results

Who it is for

For people who measure, calibrate, program and teach in industry.

  • Instrument technicians

    The ALOGY specialty: signals, ranges, sensors, tuning and calibration sheets for everyday field work.

  • Electronics, electrotechnics and mechatronics technicians

    Sensor current, resistance and voltage, with reference tables and the formula in view.

  • Electricians

    Residential (free) and industrial cable sizing based on Brazilian NBR 5410, with breaker, RCD and voltage drop; 4⁠–⁠20 mA loops with diagnosis of reversed polarity and open loop.

  • Engineers

    DP transmitter range and tuning from the process model, with explicit assumptions to review.

  • Students

    Every result explained, with interactive diagrams and simulation to understand before applying.

  • Teachers and instructors

    Interactive tank, signals and PID loop to demonstrate in class, in Portuguese, English or Spanish.

  • System integrators

    Parameters in the form, unit and scale of the project PLC or controller.

  • Maintenance and automation teams

    Drafts on the device, file backups and PDF reports to record the job.

  • Suppliers and industry companies

    Reports with no ALOGY logo or advertising, ready to attach to the customer job.

Tools by area

Questions

Frequently asked questions

How much does ALOGY Tools cost?

The monthly plan costs R$19.90 per month and the yearly plan R$149 per year, equivalent to R$12.42 per month. Both give access to the same tools.

How do I subscribe?

Choose the plan, log in with your e-mail (we send you an access code) and pay by Pix or card on the Asaas page. Access is granted as soon as the payment is confirmed.

Can I use it before subscribing?

Yes. Six tools are free: the 4–20 mA calculator, residential cable sizing, the unit converter, RPM and pulleys, flow × velocity × diameter and PPM ↔ mg/m³. This page also has demos of the DP tank and of PID tuning. The other tools are part of the subscription.

Can I cancel?

Yes, whenever you like, in My account. Within 7 days of the first payment, you can withdraw and get the full amount back. After that, canceling stops the renewal and access continues until the end of the period already paid, with no refund.

Does the report replace a calibration certificate?

No. The tools document calculations and data collection. They state what they do not do: they declare no conformity, uncertainty or traceability without the data from your procedure.

Can I apply the PID tuning straight to the PLC?

It is a starting point calculated from the process model, with simulation and values in the device convention. Applying it to the plant requires an authorised test and monitoring of the loop.

Does my data go to a server?

Calculations run on your device. Your work is saved in your browser, and the backup file stays with you. Subscribers can also keep work in their account, only when they click “Save to account”, to open it on another device.

Does it work on a phone, in the field?

Yes. Screens are designed for one hand and gloves: 44 px touch targets, a +/− key for negative values and text of at least 12 px on phones.

Why use the tool instead of just asking an AI?

An AI chat explains well, but it can get a coefficient wrong, mix editions of a standard or miss a criterion, and its answer changes from one time to the next. Here, each calculation uses the tables of the cited standard, checks the main criteria together (for a cable: capacity, voltage drop, short circuit and shock protection), shows each tool’s limits and comes out as a PDF with the data used. The page “How we verify the calculations” shows official values side by side with the tools’ results.

Do I need an internet connection?

Not once the device is prepared: on the tools dashboard, tap “Use offline” and the tools open without signal (subscription tools until the end of the access confirmed at the last connection). You can also install the app on your phone’s home screen.

Can I put my company name on the PDFs?

Yes, with the subscription. In My account, fill in the report header with your name or your company’s, the contact and the logo: every PDF of the tools comes out with it. Without the header, the PDFs come out neutral, with no brand.

In which languages?

Portuguese, English and Spanish: screens, help and reports.

Field calculations solved and explained, in your pocket.

See the plans

R$19.90 per month or R$149 per year.