At a Glance. WIKA covers the four pillars of process instrumentation: TR10 / A2G-mini pressure transmitters (4–20 mA / HART output, electronic reading); 100.10 / 100.12 dial pressure gauges (local mechanical readout); 981.10 electronic pressure / differential switches (relay output on setpoint); TC82 / FLR-F temperature switches and thermometers. The right choice is dictated by whether the operator needs a local reading, a remote (4–20 mA) signal, a switching contact, or all three.
1. Side-by-Side Comparison Table
| Family | Output / Readout | Function | Stock Example |
|---|---|---|---|
| TR10-3 (pressure transmitter) | 4–20 mA + HART | Remote pressure reading into DCS / PLC | TR10-3 |
| A2G-mini (differential pressure transmitter) | 4–20 mA / Modbus | HVAC and filter dP monitoring | A2G-mini |
| 100.10 / 100.12 (process gauge) | Local dial | On-site pressure indication, no electronics | 100.10 / 100.12 |
| 981.10 (electronic pressure switch) | Relay + 4–20 mA | Switching on pressure setpoint + analog signal | 981.10 |
| TC82 (temperature switch / sensor) | Relay / 4–20 mA | Switching on temperature + analog output | TC82 |
| 990.24 (electronic pressure switch, compact) | Relay / PNP | Compact pressure switch for OEM machines | 990.24 |
| 1000-6A (gas-actuated thermometer) | Local dial | Process temperature at the point of measurement | 1000-6A |
| FLR-F (float level / thermometer) | Local reading | Combined level and temperature for tanks | FLR-F |
2. Decision Guide — Which WIKA Instrument Fits Your Application?
- Need 4–20 mA into DCS / SCADA from a process pipe? → TR10-3 pressure transmitter (TR10-3).
- Filter or HVAC duct, need dP 0–100 Pa / 0–10 kPa? → A2G-mini dP transmitter (A2G-mini).
- Local dial reading for an operator, no electronics? → 100.10 / 100.12 process gauge (100.10 / 100.12).
- Pump / compressor trip on pressure threshold? → 981.10 electronic pressure switch (981.10) with relay output.
- Temperature trip on a bearing or motor housing? → TC82 temperature switch (TC82).
- Compact OEM machine, only PNP switching needed? → 990.24 compact pressure switch (990.24).
- Local temperature indication next to a pipe, no power? → 1000-6A gas-actuated thermometer (1000-6A).
- Tank level + temperature in one mechanical instrument? → FLR-F float thermometer (FLR-F).
3. Transmitter vs Gauge vs Switch — When to Use Which
| Aspect | Transmitter (TR10) | Gauge (100.10) | Switch (981.10) |
|---|---|---|---|
| Provides reading | Yes (continuous 4–20 mA) | Yes (local dial) | No / optional |
| Provides switching contact | No | No | Yes (relay or PNP) |
| Power supply | Required (loop powered) | Not required | Required |
| Accuracy class | ±0.1 % to ±0.5 % | Class 1.0 to 2.5 | ±0.5 % FS typical |
| Use case | Process control, data logging | Local visual indication | Alarm, trip, interlock |
4. Sizing — Pick the Right Range
For a process transmitter, choose a calibrated range that puts the normal operating point at 50–70 % of span. For a gauge, the operating point at 60–80 % of full scale. For a switch, the setpoint should sit between 30 % and 70 % of the sensor range for repeatable switching.
5. Quick FAQ
Q: Can a TR10 replace a 100.10 gauge?
Functionally yes, but a transmitter needs a power loop and a remote reader; a gauge is stand-alone. Many plants mount both: the gauge for the local operator, the transmitter for the DCS.
Q: Is 981.10 HART capable?
Yes, the 981.10 has HART on most variants for remote setpoint adjustment.
Q: Can TC82 measure both temperature and switch?
Yes, the TC82 has an analog 4–20 mA output for reading and a relay for switching on setpoint.
6. Related Products in Stock
- WIKA TR10-3 — Pressure transmitter, 4–20 mA / HART.
- WIKA A2G-mini — Differential pressure transmitter.
- WIKA 100.10 / 100.12 — Process pressure gauge.
- WIKA 981.10 — Electronic pressure switch.
- WIKA TC82 — Temperature switch / sensor.
- WIKA 990.24 — Compact electronic pressure switch.
- WIKA 1000-6A — Gas-actuated thermometer.
- WIKA FLR-F — Float thermometer / level indicator.
Need help selecting the right WIKA pressure or temperature instrument — transmitter, gauge, switch or thermometer — for your process line? Request a quote with your medium, range, output type and approval requirements; we will cross-reference the right WIKA model.