Aquaculture electronics in Ecuador can build an exact 10-to-1 megohm divider from Walsin lists, but not from one series. All 416 Walsin high-ohm resistors above 10 megohm have a partner at one tenth of the value; 344 exist only in another series, and none of the 416 is on our 23 September 2026 stock list.
Venatech Limited, an authorised Walsin distributor in Hong Kong, holds the Walsin Technology (Walsin) chip resistor exports of 234,815 rows (234,401 distinct part numbers) and a Hong Kong ready-stock list dated 23 September 2026. This post is for a design engineer or buyer at an Ecuadorian maker of pond monitors, aerator controllers and water-quality instruments who needs a resistor pair in the megohm range and wants to know what a Hong Kong source can offer. Every part number below is real and every count is ours.
What is happening to shrimp exports in Ecuador in 2026?
They are at records. SeafoodSource reported on 3 July 2026, citing Ecuador’s National Aquaculture Chamber, that Ecuador exported 165,538 tonnes of shrimp in May 2026, a single-month record and up 9% on May 2025, and 668,763 tonnes from January to May, up 13%. We read the article on 23 October 2026.
The same report puts January to May export value at 3.52 billion US dollars, up 12%, and names China as the largest market at 342,669 tonnes for the five months, up 17%, with the United States at 145,696 tonnes, up 29%.
Our view, labelled as ours: more tonnes means more ponds under management, and ponds under management mean more probes, aerator controllers and loggers. We cannot see any farm’s equipment, and we make no claim about one.
Why would a shrimp-farm electronics buyer need megohm resistors?
Because high-impedance sensor inputs are biased and divided with very large resistors. A divider whose top leg is 100 megohms and bottom leg 10 megohms draws a tenth of the current of a 10 megohm and 1 megohm divider across the same rail, and that is the sort of trade a battery-powered pond node makes. This is design practice, not a statement from any source in this post.
The practical question is narrower: if the design calls for a ratio of exactly 10 to 1 in the megohm range, can the two legs be bought from one supplier at the same size and tolerance? That is what we counted.
How many Walsin high-ohm resistors have an exact 10-to-1 partner?
All of them. We parsed the Walsin High Ohm group, 488 rows, and took the 416 whose value is 11 megohms or more as top legs; for every one of the 416 there is a Walsin resistor at exactly one tenth of the value, at the same case size and the same tolerance. We have not seen this counted anywhere.
| Case size | Tolerance | Top legs (11 MΩ to 100 MΩ) | Partner inside the High Ohm group | Partner in the general purpose WR series | Top legs on the shelf |
|---|---|---|---|---|---|
| 0603 | ±1% | 111 | 0 | 111 | 0 |
| 0603 | ±5% | 24 | 24 | 24 | 0 |
| 0805 | ±1% | 111 | 0 | 111 | 0 |
| 0805 | ±5% | 24 | 24 | 24 | 0 |
| 1206 | ±1% | 111 | 0 | 111 | 0 |
| 1206 | ±5% | 24 | 24 | 24 | 0 |
| 0402 | ±5% | 11 | 0 | 11 | 0 |
| Total | 416 | 72 | 416 | 0 |
The reason the ±1% column inside the group is zero is simple: the group’s ±1% rows start at 11 megohms, so a tenth of any of them is 1.1 megohms or more, which only the general purpose series holds. The ±5% rows start lower, at 1.1 megohms, so at 0603, 0805 and 1206 the group contains both legs of 24 pairs per size. That makes 72 pairs that can stay in one series and 344 that cannot (333 at ±1% and 11 at 0402), per our parse of the exports.
| Top leg | Partner at one tenth | Size, tolerance | Match / mismatch |
|---|---|---|---|
WF06G1006FTL (100 MΩ) |
WR06W1005FTL (10 MΩ) |
0603, ±1% | Match on exact 10-to-1 ratio, size, tolerance, rated power (1/10 W both). Mismatch on series, and on TCR (≦±200 against ≦±100 in the export). Neither on the shelf |
WF06G1105FTL (11 MΩ) |
WR06W1104FTL (1.1 MΩ) |
0603, ±1% | Match on ratio, size, tolerance, power (1/10 W). Mismatch on series and TCR. Neither on the shelf |
WF12G1006FTL (100 MΩ) |
WR12W1005FTL (10 MΩ) |
1206, ±1% | Match on ratio, size, tolerance, power (1/4 W). Mismatch on series and TCR. Neither on the shelf |
WF06G107 JTL (100 MΩ) |
WF06G106 JTL (10 MΩ) |
0603, ±5% | Match on ratio, size, tolerance, series and TCR (≦±200 both). Both numbers contain a space before JTL |
WF04G116 JTL (11 MΩ) |
WR04X115 JTL (1.1 MΩ) |
0402, ±5% | Match on ratio, size, tolerance, power (1/16 W). Mismatch on series and TCR |
WR04W1504FTL (1.5 MΩ, on the shelf) |
none | 0402, ±1% | Mismatch: the 15 MΩ top leg would be a ±1% 0402 part, and the High Ohm group holds no ±1% part at 0402 |
What changes when the two legs come from different series?
The temperature coefficient and the family. In our export, every High Ohm row carries a TCR of ≦±200 ppm per °C, while the general purpose WR partners at 10 megohm and below carry ≦±100, so a cross-series divider has two different temperature behaviours by specification. The ratio can then drift with temperature even when both parts are inside tolerance. The Walsin WR sheet, ASC_WR_V24, prints its TCR bands by resistance range, and the High Ohm group has no sheet of its own to compare against.
Rated power matches in every pair we printed, because the group and the WR series use the same power for the same case size. A divider is rarely power-limited at these values; the working voltage is the usual limit, and the export carries no working-voltage column for the High Ohm group. If you need to know how much voltage a 100 megohm 1206 part may see, the answer comes from a datasheet, not from us reading the export. We will not guess it: ask us for the datasheet that covers your number and we will say if we do not hold one.
Five stocked lines are 1 megohm or more, all in the general purpose series at ±1%, and none of the five can be a bottom leg for a High Ohm top: the group has no ±1% value below 11 megohms and no ±1% part at 0402. A stocked bottom leg without a stocked top leg is half a divider, and we say so.
What do we hold in documents for the high-ohm group?
None. We opened all 28 Walsin datasheets, 451 pages, and the only two for chip resistors are the general purpose WR sheet, ASC_WR_V24 of September 2016, and the MR automotive sheet, ASC_MR_V13 of March 2024; neither covers the High Ohm group, and the WR sheet lists a range of 1 to 10 megohms. The group is 11 to 100 megohms plus a ±5% block from 1.1 megohms.
That is a statement about the documents, not about the parts. The stock figures are as at 23 September 2026, and the datasheet gap is ours to disclose: the other 26 datasheets are MLCC approval sheets, and 84.2% of our 359,135 part numbers have no datasheet at all. For credentials you can check, UL file E182369 is in UL’s public database for the Walsin safety capacitor series, which has nothing to do with resistors. Venatech holds neither ISO 9001 nor IATF 16949, and we say so plainly. We hold no aquaculture, marine or humidity qualification for any resistor, and nothing in this post claims one. We can provide lot and date-code traceability and a certificate of conformity per shipment on request. We give no customs, tax or import advice for Ecuador and state no country of origin for any part, because none of the documents we hold names a manufacturing site. Ask your compliance team.
How can Venatech help an Ecuador aquaculture electronics buyer?
By crossing the resistor you already use, naming the partner leg, and telling you what we cannot show. Venatech Limited is an authorised Walsin distributor in Hong Kong. Walsin is our only authorised line; the other lines we supply are Stackpole and Viking.
- Cross-reference. Paste the incumbent number into the free cross-reference tool, which decodes 18 manufacturers’ part numbers across 800,000+ crossable parts, and read each Walsin candidate with match and mismatch stated field by field.
- BOM check. Upload a bill of materials to /bom/ and have each line checked against the same engine.
- Ready stock. The ready stock list is a Hong Kong snapshot dated 23 September 2026, never live-synced. It holds 1,125 lines and none is in the High Ohm group.
- Service. Hong Kong-based, small lots, cross-referencing help, and a quote requested through the site. Unit 207, 2/F, Sun Ling Plaza, 30 On Kui Street, Fanling, N.T., Hong Kong, telephone (852) 2628 4777.
A worked example from our own export: a 100 megohm, ±1%, 0603 top leg is WF06G1006FTL and a 10 megohm partner at the same size and tolerance is WR06W1005FTL, in a different series, neither on the shelf. Our chip resistor range lists the families, and our post on reading a cross result explains the five-field check. Confirm against both datasheets and qualify in your own circuit.
The short version
SeafoodSource reported on 3 July 2026, citing Ecuador’s National Aquaculture Chamber, that shrimp exports were 668,763 tonnes in January to May 2026, up 13%. All 416 Walsin high-ohm resistors at 11 megohms and above have an exact 10-to-1 partner at the same size and tolerance, 344 of them only in a different series with a different TCR, and none of the 416 is on the shelf.
Send us the two resistors your probe interface actually uses, as incumbent numbers, and we will return the Walsin pair with every difference stated. If one leg is in a different series from the other, do you know what your ratio does when the pond heats up?
Sources
Fetched 23 October 2026. The trade statements above come from this page; the part data comes from our own Walsin chip resistor exports, the Walsin WR and MR sheets named above and our stock list.
- SeafoodSource, “Ecuador’s shrimp exports hit all-time record in May”, 3 July 2026: https://www.seafoodsource.com/news/ecuador-s-shrimp-exports-hit-all-time-record-in-may
Frequently asked questions
How much shrimp did Ecuador export in January to May 2026?
SeafoodSource, citing Ecuador’s National Aquaculture Chamber, reported on 3 July 2026 that exports were 668,763 tonnes for January to May, up 13%, with May at a record 165,538 tonnes. It is one trade report, so check the chamber’s own release.
Can I build an exact 10-to-1 resistor divider from Walsin high-ohm parts?
Yes on the value fields. All 416 High Ohm rows at 11 megohms or more have a Walsin resistor at exactly one tenth of the value, same size and tolerance. 72 pairs stay inside the High Ohm group, all at ±5%; 344 cross into the general purpose series.
Do the two legs have the same temperature coefficient?
Not across series. The export lists ≦±200 ppm per °C for every High Ohm row and ≦±100 for the general purpose partners we printed. Pairs inside the High Ohm group share the same figure. Compare both datasheets and qualify the divider in your own circuit.
Is any high-ohm part on the Hong Kong shelf?
No. None of the 416 top legs is on the 23 September 2026 stock list, and the five stocked lines at 1 megohm or more are general purpose ±1% parts that none of the top legs can pair with. The list is a dated snapshot and moves.
Do you give customs or import advice for Ecuador?
No. We give no customs, tax or import advice and we state no country of origin for any part, because none of the documents we hold names a manufacturing site. Ask your compliance team. We can provide lot and date-code traceability and a certificate of conformity per shipment on request.
How do I send you a resistor to cross?
Paste the part number into the free cross-reference tool, upload a bill of materials to the BOM page, or request a quote through the site. We return Walsin candidates with each match and mismatch stated, and we say plainly where there is none.