Testo 6681 – Temperature/humidity transmitter for critical applications
The testo 6681 temperature and humidity transmitter is designed for monitoring critical climate in industrial processes (e.g. production/process engineering). If these involve maximum precision or specialized applications (high humidity, trace humidity, etc.), then this climate transmitter is the ideal choice because, when it comes to humidity measurement, it features unrivalled cutting-edge technology.
- High-precision Testo humidity sensor with long-term stability for high humidity applications (optional)
- Ethernet, relay and analog outputs enable optimum integration into individual automation systems
- High-quality digital probes and an intelligent calibration concept
- Self-monitoring and an early warning function ensure high system availability
Transmetteur Testo 6681
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| Measuring range | 0 to 100 %RH |
| Trace humidity Selectable units |
Dewpoint in °Ctd/°Ftd |
| Measuring range | -60 to +30 °Ctd / -76 to +86 °Ftd(only with testo 6610 L15) |
| Temperature Selectable units | Temperature in °C/°F |
| Etendue de mesure selon la sonde | -40 à +356°C |
| SupplyAnalog outputs
Quantity |
2, optionally 3 channels (channel freely selectable) |
| Output type | 0/4 to 20 mA (2-wire/4-wire) 0 to 1/5/10 V (4-wire) |
| Cadence de mesure | 1/s |
| Galvanic isolation | Galvanic isolation of the output signals (2-wire and 4-wire), isolation of supply from outputs (4-wire) |
| Résolution | 12 bit |
| Accuracy of the analog outputs | 0/4 to 20 mA ± 0.03 mA 0 to 1 V ±1.5 mV 0 to 5 V ±7.5 mV 0 to 10 V ±15 mV |
| Ethernet | Optional: module can be fitted as intermediary layer |
| Relays | Optional: 4 relays (free allocation to measurement channels or as collective alarm with operating menu/PsA software), up to 250 V AC/DC / 3 A (NO/NC) |
| Other outputs | Mini-DIN pour logiciel de paramétrage testo P2A et appareil de référence 400/650 |
| Dimensions Weight |
122 x 162 x 77 mm (sans sonde) 1,5 kg (sans sonde, sans Profibus/module Ethernet) |
- Overview
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Testo 6681 – Temperature/humidity transmitter for critical applications
The testo 6681 temperature and humidity transmitter is designed for monitoring critical climate in industrial processes (e.g. production/process engineering). If these involve maximum precision or specialized applications (high humidity, trace humidity, etc.), then this climate transmitter is the ideal choice because, when it comes to humidity measurement, it features unrivalled cutting-edge technology.
- High-precision Testo humidity sensor with long-term stability for high humidity applications (optional)
- Ethernet, relay and analog outputs enable optimum integration into individual automation systems
- High-quality digital probes and an intelligent calibration concept
- Self-monitoring and an early warning function ensure high system availability
- Technical specification
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Transmetteur Testo 6681
Measuring range 0 to 100 %RH Trace humidity
Selectable unitsDewpoint in °Ctd/°Ftd Measuring range -60 to +30 °Ctd / -76 to +86 °Ftd(only with testo 6610 L15) Temperature Selectable units Temperature in °C/°F Etendue de mesure selon la sonde -40 à +356°C SupplyAnalog outputs Quantity
2, optionally 3 channels (channel freely selectable) Output type 0/4 to 20 mA (2-wire/4-wire)
0 to 1/5/10 V (4-wire)Cadence de mesure 1/s Galvanic isolation Galvanic isolation of the output signals (2-wire and 4-wire), isolation of supply from outputs (4-wire) Résolution 12 bit Accuracy of the analog outputs 0/4 to 20 mA ± 0.03 mA
0 to 1 V ±1.5 mV
0 to 5 V ±7.5 mV
0 to 10 V ±15 mVEthernet Optional: module can be fitted as intermediary layer Relays Optional: 4 relays (free allocation to measurement channels or as collective alarm with operating menu/PsA software), up to 250 V AC/DC / 3 A (NO/NC) Other outputs Mini-DIN pour logiciel de paramétrage testo P2A et appareil de référence 400/650 Dimensions
Weight122 x 162 x 77 mm (sans sonde)
1,5 kg (sans sonde, sans Profibus/module Ethernet) - Download
