For sensor manufacturers and distributors
Your customers already do these calculations: choosing an RTD class, sizing a current transformer's burden, decoding a Modbus register, biasing a thermistor. Let them do it for your part, in one click, with calculators that are checked against the standards they cite.
1 · Prefilled links from datasheets and product pages
Every calculator reads its inputs from the address. Put the values from your datasheet into the link, and the engineer who clicks it sees the calculation for your part, with the method and the standard behind it. Examples:
- NTC thermistor, 10 kΩ, B = 3435 K:
/tools/ntc-voltage-divider-calculator/?r0=10000&b=3435 - Current transformer, 5 A secondary, 5 VA:
/tools/current-transformer-burden-calculator/?isec=5&rated=5 - Device with a FLOAT32 register:
/tools/modbus-register-decoder/?type=f32®s=0x41C8+0x0000
The parameters of all 29 calculators, with units, allowed values and defaults, are in the calculator link format (also as JSON). Parameters are never renamed or removed, so a link printed today keeps working.
2 · Embed a calculator
Code for your page
- Free, also for commercial sites. Keep the credit line under the frame; it links to the full calculator.
- The embedded calculator shows no advertising and sets no cookies. We count views per embedding site (its host name only), nothing about the visitor.
- It updates by itself when a calculator is corrected or improved. The results are the user's to check, as on this site (terms).
- Please don't present the calculator as your own engineering, or a link to it as a review or an endorsement of your product.
Preview
3 · Your parts under the calculation
Each calculator turns its result into requirements: a PT100 element covering 0 to 150 °C, a current transformer of at least 3.2 VA, a loop-powered transmitter that works from 11.8 V. Under the calculation there is a reserved Matching products area. A part is shown there only when it meets every requirement; a part that lacks an attribute does not match. The area is labelled (Sponsored, Partner or Affiliate links) and kept apart from the calculation, and the calculation never changes for a sponsor.
Nothing is listed today. Parts appear only from data supplied by their manufacturer, or from a distributor feed whose terms allow it: we do not copy part data from datasheets ourselves. The data format:
| Field | Content |
|---|---|
id | your stable identifier for the part |
category | one of the categories below |
brand, mpn | brand and manufacturer part number |
name | short English description |
attrs | the attributes below that the part meets, in the units given |
url | product page (may carry your own tracking parameters) |
datasheet | link to the datasheet (optional) |
regions | ISO country codes where the part is sold (optional; all if left out) |
Attributes
| Attribute | Type | Meaning |
|---|---|---|
element | text | RTD element: 'PT100', 'PT500', 'PT1000', 'Ni100', 'Ni1000' |
wires | number | RTD connection: 2, 3 or 4 wires |
tc_type | text | thermocouple type letter, e.g. 'K' |
temp_range_c | [lo, hi] | operating temperature range, °C |
input | text | transmitter or indicator input: 'RTD', 'TC', 'mV/V' |
output | text | '4-20mA', '4-20mA-HART', 'mV/V' … |
min_supply_v | number | minimum terminal voltage of a loop-powered device, V |
pressure_url_pa | number | upper range limit, Pa |
ref_accuracy_pct | number | reference accuracy, % of span |
capacity_kg | number | rated capacity per load cell, kg |
channels | number | load cell inputs of a junction box |
r25_ohm | number | NTC resistance at 25 °C, Ω |
beta_k | number | NTC beta value, K |
burden_va | number | rated burden of a current transformer, VA |
rh_range_pct | [lo, hi] | relative humidity range, % |
accel_range_g | number | acceleration range, g |
freq_range_hz | [lo, hi] | frequency range, Hz |
ip | text | ingress protection code, e.g. 'IP67' |
thread | text | process or cable thread, e.g. 'G 1/2', '1/2 NPT' |
ex_epl | text | equipment protection level, e.g. 'Gb' |
ex_group | text | gas or dust group, e.g. 'IIC' |
max_surface_temp_c | number | maximum surface temperature, °C (from the T class) |
nec_class_division | text | e.g. 'Class I Div 1' |
nec_groups | text | NEC groups, e.g. 'B' |
Categories
accelerometercable-glandcurrent-sensorcurrent-transformerdew-point-transmitterdp-flow-transmitterdp-transmitterencoderex-pressure-transmitterex-sensorex-temperature-sensorex-transmitterflow-meterhumidity-sensorhumidity-transmitterjunction-boxlevel-transmitterload-cellloop-power-supplyloop-powered-isolatorntc-probentc-thermistorpressure-transmitterrtd-cablertd-elementrtd-probesensorshuntsignal-isolatorstrain-gaugetemperature-sensortemperature-transmitterthermocouple-cablethermocouple-probethread-adaptertransmittertwo-wire-transmittervibration-sensorvibration-transmitterweighing-indicatorwireless-sensor
Why engineers can rely on the numbers
- Each calculator states its method and the standard it follows (IEC 60751, IEC 60584-1, NAMUR NE 43, IEC 60079 and others) on its own page.
- Every build compares the calculators with published reference tables and worked examples; a deviation beyond tolerance stops the build. The comparison is public: how the results are checked.
- No account, no paywall, in seven languages, and it works offline once opened.
Contact
For a calculator your product family needs, product data for the Matching products area, a co-branded embed, or a question about the link format: [email protected]. Please say which calculators and which parts it is about.