Divergence Meter#

Divergence Meter
Divergence Meter1.048596 — the number everyone is chasing.
Designation Divergence Meter (no FG number assigned)
Function Displays the current worldline's divergence value
Display Eight Nixie tubes, seven significant digits
Origin Delivered to the lab by a future visitor
Readable by Anyone; interpretable only with Reading Steiner
Reference values Alpha < 1%, Beta ≥ 1%, Steins Gate ≈ 1.048596
Power draw ~12 W continuous
Housed at Future Gadget Laboratory
Maintained by Rintaro Okabe
Replication status One working replica, built decades early
Status Operational

The Divergence Meter is a Nixie-tube instrument that displays a single number: the divergence value of the worldline the observer currently occupies, measured against an arbitrary zero point. It is the only instrument the Future Gadget Laboratory possesses that can distinguish one worldline from another from the inside — without it, a shift caused by a D-Mail is detectable only by people whose memories survive the transition.

Unlike the Phone Microwave and the Time Leap Machine, the meter was not invented at the lab — at least, not yet. The unit on the lab's workbench was ==delivered by a visitor who claimed to come from decades in the future==, along with the schematics needed to eventually build it. The lab therefore maintains the awkward position of owning a device it will not invent for another thirty-odd years. #lore

👁️Reading the meter

The display shows a fixed-point decimal such as 1.048596. The integer part identifies the attractor field — the broad basin of worldlines that converge toward the same major events — and the fractional digits identify the specific worldline within it. Values below 1.000000 belong to the Alpha attractor field; values from 1.000000 up (excluding the anomalous Steins Gate band) belong to Beta.

Crucially, the meter's reading changes at the instant of a worldline shift, but only an observer with Reading Steiner will notice, because for everyone else the meter has "always" shown the new value. Okabe's habit of photographing the display before every experiment exists precisely to defeat this: the photo changes too, but his memory of taking it doesn't.

Reference readings

  • 0.337187 — deep Alpha
  • 0.571024 — Alpha, late-stage
  • 1.048596 — Steins Gate
  • 1.130205 — Beta
  • 3.406288 — unconfirmed #stub
📊Recorded values

A sortable log of readings photographed at the lab. Compare with the episode-by-episode account in the episode-guide.

Reading Attractor field Context First noted
0.337187 Alpha Deepest recorded Alpha excursion Episode 12
0.409431 Alpha After the lottery D-Mail was undone Episode 10
0.456903 Alpha Baseline for mid-series experiments Episode 06
0.523299 Alpha Post-IBN retrieval Episode 09
0.571024 Alpha Final Alpha reading Episode 13
1.048596 Steins Gate Target value Episode 16
1.064750 Beta First Beta confirmation Episode 14
1.130205 Beta Stable Beta plateau Episode 15

The meter does not predict. A reading of 1.048596 does not mean events will go well; it means the worldline is outside both the Alpha and Beta attractor fields' convergence — free, for better or worse, of their fixed outcomes. See steins-gate-worldline.

🔧Construction

The replica was built by Okabe and Daru from the future schematics, sourcing IN-14 Nixie tubes from a stall in Akihabara's back streets and a driver board hand-etched at the lab. Each tube requires roughly 170 V to strike; the boost converter's output capacitor stores

$$E = \tfrac{1}{2}CV^2 = \tfrac{1}{2}(47,\mu F)(170,\text{V})^2 \approx 0.68\ \text{J}$$

which is trivial next to the PhoneWave's discharge but enough to bite a careless finger.1 The sensing element — the part that actually measures divergence — is not documented in the schematics at all. The delivered unit contains a sealed module the lab has never opened, on the visitor's advice that opening it voids more than the warranty.

Eight IN-14 tubes, multiplexed 4:1. Daru's firmware refreshes at 120 Hz to kill visible flicker on camera — important, given how often the thing gets photographed.

Sealed. Mass 412 g, faintly warm, no external connections besides power and a one-wire data line. The lab's collective decision is to not think about it too hard.

Walnut and brushed aluminum, machined at the Braun Tube Workshop downstairs in exchange for a month of shop-sitting.

The person who delivered the meter also delivered a warning about what the Alpha attractor field converges to. Their identity is discussed on the worldline pages rather than here; suffice to say the lab had a personal stake in believing them. See alpha-worldline for the long-run outcome the meter helped everyone escape.

🔗See also
Nixie tubes
IN-14 tubes mid-multiplex. The camera catches what the eye can't.

For the physics-adjacent background on cold-cathode displays, see Nixie tube. The meter's readings anchor the timeline notation used across this wiki — every event page cites a divergence value where one is known. Related: Attractor field theory, D-Mail, and the never-built pocket divergence meter Daru keeps proposing.

TechnologyAttractor Field Theory·D-Mail·Divergence Meter·Future Gadget #1: Bit Particle Cannon·Future Gadget #2: Bamboo Helicam·Future Gadget #3: Cyalume Saber·Future Gadget #4: Moad Snake·Future Gadget #5: Kerberos Tap·Gel Banana Phenomenon·IBN 5100·Phone Microwave (Name; Phone Wave)·Reading Steiner·SERN Large Hadron Collider·Time Leap Machine

Footnotes#

  1. Twice. Both times Daru, both times the same finger. ↩