LIMES hardness monitor
Hardness monitor for the online monitoring of a total-hardness limit value – as LIMESBASE (entry-level) or LIMESPLUS (extended control).
Private customers can also find our range in our partner store Ampha-Analyse.
Reagent for LIMES hardness monitor:
See also:
LIMES hardness monitor – online monitoring of water hardness (BASE & PLUS)
What is the LIMES used for?
The LIMES hardness monitor reliably monitors whether the total hardness of the water stays within a defined limit value – ideal for monitoring reverse-osmosis and water-softening systems. It is available in two models: the entry-level LIMESBASE and the LIMESPLUS with extended control options. Select the appropriate model above.
How does it work?
The device works on the principle of “limit-value monitoring with colour change” using a laboratory-calibrated LHV indicator. The limit value is defined by the indicator type; if it is exceeded, the LIMES outputs a signal on a potential-free relay output that can be further processed, e.g. by a softening controller. It requires no calibration, shows no drift effects and is not subject to sensor wear.
LIMESBASE or LIMESPLUS? The differences
Both models reliably monitor the same hardness limit value. The LIMESPLUS additionally offers more flexibility in analysis interval and plant control:
| Feature | LIMESBASE | LIMESPLUS |
|---|---|---|
| Analysis interval | 10 min (fixed) | 5 / 10 / 20 / 30 min (selectable) |
| Input contact (INPUT) | fixed (50 sec.) | freely usable (start/stop) |
| Connection to external control | – | yes (control room, reverse osmosis, external control) |
| Digital input | no | 1 |
| Upgradable to LIMESPLUS | yes | – |
Benefits at a glance
- Reliable limit-value monitoring with a laboratory-calibrated indicator
- No delayed response (compared to a swelling-resin sensor)
- No calibration, no drift effects (compared to electrode measurement)
- No sensor wear, no regeneration needed
- Up to 10,000 analyses per 750 ml indicator bottle
- Status display via four LEDs (limit value, analysis, device, service)
💡 Do you need more than just a limit value?
The LIMES reliably monitors whether a hardness limit value is maintained. If you want to continuously measure the exact hardness value, record additional parameters (carbonate hardness, iron, p-value, silicate) or integrate it into your plant control via Modbus, our SYCON series is the right choice. → To the SYCON series
Application
The LIMES is used for the continuous monitoring of total hardness – wherever a hardness limit value must be reliably maintained, e.g. in reverse-osmosis and water-softening systems or in boiler and feed-water treatment. If the limit value is exceeded, the device outputs a signal on a potential-free relay output.
Setting the limit value
The limit value is defined by the indicator type used – for total hardness, four LHV indicators with different measuring ranges are available (see measuring range).
💡 First-value suppression
If the limit value is exceeded, the device first carries out a repeat measurement before an alarm is triggered – this avoids false alarms caused by brief fluctuations.
Das LIMESBASE ermöglicht die Überwachung eines Messbereiches.
Der Messbereich richtet sich nach dem verwendetem Indikator.
Messbereiche für Gesamthärte (LHV):
| Indikator | Artikelnummer | Messbereich | ||||
|---|---|---|---|---|---|---|
| Einzelflasche | Vorteilspack | °dH | °f | ppm CaCo3 | °e | |
| LHV-0,1 | 32-074135 | 32-474135 | 0,03 – 0,3 | 0,054 – 0,536 | 0,54 – 5,36 | 0,038 – 0,375 |
| LHV-0,5 | 32-074165 | 32-474165 | 0,15 – 1,5 | 0,27 – 2,68 | 2,7 – 26,8 | 0,19 – 1,87 |
| LHV-3 | 32-074195 | 32-474195 | 0,9 – 9 | 1,6 – 16,1 | 16,1 – 160,1 | 1,13 – 11,2 |
| LHV-7 | 32-074210 | 32-474210 | 2,1 – 21 | 3,7 – 37,4 | 37,4 – 373,8 | 2,63 – 26,3 |
Technical data
| Property | LIMESBASE | LIMESPLUS |
|---|---|---|
| Measuring principle | Limit-value monitoring with colour change | |
| Parameter | Total hardness (via LHV indicators) | |
| Indicator bottle | 750 ml (up to 10,000 analyses) | |
| Analysis interval | 10 min (fixed) | 5 / 10 / 20 / 30 min (selectable) |
| Input contact | fixed (50 sec.) | freely usable (INPUT) |
| Digital input | no | 1 |
| Relay outputs | 2 (limit-value alarm, potential-free) | |
| Modbus | no | |
| Protection class | IP43 | |
| Scope of delivery | LIMES analyser (1.75 m connection cable), connection box, LIMES connection set | |
| Article number | 30-003501 | 30-003502 |
Additional information
| Modell | BASE, PLUS |
|---|
Flyer
Operating instructions
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