Wireless water level switch


Level switch PWB assembly consist of detector, transmitter and receiver as shown in Figure1.


The detector detects small current between conductive stand and probe.

It has Normal and Reverse mode.
Normal: off -> on (level up)
Reverse: off -> on (level down)

The detector may transmit the signal to transmitter 33m long by 2-wire current.


The transmitter supplies power with the detector and tells receiver 6km far.

The body includes step up DC-DC converter for 1.5V x 2 batteries.

Enoki recommends to adopt fine battery holder that has Ni plating electrode well. Poor Ni plating causes abrupt power down.


The receiver turns on/off pump through SSR[1], when it receives the signal.


Enoki will distribute Detector PWB Assy, Transmitter and Receiver PWB Assy in near future.

If you have any request and need other probe or some thing, Enoki will ship them in the world.

The photos shows prototype, so the actual PWB Assy may be different.


Enoki accepts US$ by PayPal[2]. Enoki and the customer have to pay 4.2% fee in the US$ one another.


[1] SSR and Heat Sink 40amp
[2] Fees for Selling and Accepting Payments
Figure1 Block diagram
Photo1 Detector US$9
Photo2 Body US$10

EI and XH connector harness

Table1 JST XH and clone comparison

Some DC fans have JST XH female connector for power supply.

Enoki works harness and sends it by Air or SAL.

  1. AWG24 (0.2SQ) UL1007
  2. Less than 1.4 m
  3. Available to bundle pin header

Tell your specification by Contact. And I will make the quotation reply.


[3] Rated Current: 1A
Photo17 Bread board
Photo16 Sensor board



If you want to look up 1k value parts, enter 1001 or 102 to search string in the below input box, you will find the searched stock. Mass unit is 0.1g, therefore the value 2 means 0.2g.

Part type prefix

Input a prefix of part type name abbreviation

Input type Or value:

Variable resistor

1-turun variable volume: vr, 15-turn trimmers: tmr.


tact switch for PWB: sw.


AWG24: AWG24 (0.2SQ) UL1007. QTY unit is metric length m.


cc: ceramic capacitor (MLCC) with 5mm pitch and 0.5mm lead wire diameter, cd: disk ceramic capacitor, and cf: film capacitors.

The capacitance is expressed with 3 digits 104 for example. It means 10x104 pF therefore 0.1uF. Default pitch is 2.5mm, p50 means pitch 5mm.


2.5mm pitch connector. ei: EI (Tyco),

pin available for bread board, XH (JST Clone).

ei2pL_0-171826-2 is 2 pin right angle pin header. H and c are housing and cap housing. Pin and Rec means contact pin and receptacle (female contact pin).


metal film: rf, carbon film: rc, metal oxide: ro, cement: rs

1/4W axial metal film resistor 1% 50 or 100 ppm/°C. Color band code shows resistor specifications shown in Figure1.

rf560212 means that metal film, 56kΩ, 1% tolerance and 50 ppm temperature coefficient.

Notable online retailers shipping fee in Japan

  1. 共立電子 ¥310
  2. marutsu ¥385
  3. MISUMI ¥450
  4. aitendo ¥490
  5. 秋月電子 ¥500
Figure1 Color code