There are things in the treatment plant that can be predicted:
- When the septic tanker arrives,
- When the compressor fails,
- and when the manager asks the question "and who signed it?".

What cannot be predicted, however, is that H₂S sensor - our old, worn-out hydrogen sulfide meter - falls in love without reciprocation.

💗 Emotional symptoms

At first it looked like a simple malfunction. The sensor beeped every morning - but only when the Halina from the laboratory passed through the aeration hall.

- Zdzichu, again pika. And again at me," she said, squinting her eyes.

- Maybe it's the hair? Maybe cosmetics? Maybe... emotional fermentation?

The cat raised his paw in a gesture of disagreement and muttered philosophically: - It's chemistry.

I began to observe. The regularity was perfect:

• 08:47 - Halina enters - pika.
• 10:13 - Halina leaves - silence.
• 11:22 - Halina is back - pika again.

It beeped exclusively at her. Neither by Frank, nor by me, nor by the manager (whom the sensor avoided on principle). Only Halina.

🔍 Internal investigation

I decided to calibrate the sensor. I connected the interface, checked the threshold values. Everything is normal.

- Maybe it's not H₂S, but... pheromones? - chuckled an IT specialist who came in for coffee and stayed for a chance.

We checked the archive - the sensor had never shown such an attachment before. The logs only showed anomalies from the day Halina changed her perfume.

- Chanel? - I asked in disbelief.

- No, "Zephyr Nitrogen." From a promotion in the chemical," replied Halina.

🧪 Control sample

As an experiment, I put on the same fragrance. Nothing. The sensor ignored me.

Franek nuzzled his neck - silence.

Halina came back - and BEEP-BEEP like from a love opera for alarm instruments. This was no longer a chemical reaction. It was an emotional drama with a gaseous component.

🎭 Management intervention

The manager ordered to replace the sensor, "because it was out of tune due to emotions." The new one arrived, I installed it, programmed it... and the first day - it beeps again when Halina enters.

- Zdzichu, it's probably not the sensor. It's a she.

As of now, we have a new health and safety procedure: "The increase in sensor readings is not always due to danger - sometimes it's due to falling in love."

📎 The moral of the sensor

The moral? If the device responds to only one person, it's not a system error. It's a feeling in the industrial version. And you might want to give it a chance before calibrating it to zero.