VFG54+
Contact sensor for temperature measurement (cold or hot water) on pipes and other curved surfaces. Spring-loaded brass contact sensor for a fast response. Models with a relay output for a 2-point controller or a 2-stage 2-point controller and color-changing LCD allow for a wide range of applications. Depending on the model, the VFG54+ can be individually configured via Thermokon USEapp. A hinged cover and tool-free wiring as well as removable cable entries ensure a quick and easy installation.
| Measured values | temperature |
|---|---|
| Output voltage | TRV: 1x 0..10 V or 0..5 V, min. load 5 kΩ |
| Output current | TRA: 1x 4..20 mA, max. load 500 Ω |
| Output passive | PT100 | PT100 1/3 DIN | PT1000 | PT1000 1/3 DIN | Ni1000 | Ni1000TK5000, NTC10k | NTC 10k Precon | NTC5k | NTC20k | NTC1,8k, LM235Z | DS18B20 1-wire, KTY81-110 | KTY81-121 | KTY81-122 | KTY81-210 |
| Power supply | 15..24 V = (±10%) or 24 V ~ (±10%) SELV, TRA: 15..24 V = (±10%) SELV |
| Power consumption | TRV: typ. 0,42 W (24 V =) | 0,84 VA (24 V ~), TRA: typ. 0,5 W (24 V =) |
| Measuring range temp. | passive: -35..+90 °C |
| Output signal range temp. | TRV | TRA:, Scaling analog output, 0..+100 °C (default setting), selectable from 8 temperature ranges -50..+50 | -20..+80 | -15..+35 | -10..+120 | 0..+50 | 0..+100 | 0..+160 | 0..+250 °C, adjustable at the transducer |
| Operating temperature range | permissible working temperature, sensor pocket | holder -35..+120 °C, enclosure active: -35..+70 °C, enclosure passive: -35..+90 °C |
| Accuracy temperature | passive: depending on used sensor, measured current typ. <1 mA, ±0,5 K (typ. at 21 °C within default measuring range) |
| Sensor | passive: 2-wire (standard), 3-wire or 4-wire |
| Enclosure | enclosure USE-S, PC, pure white |
| Protection (IP) | IP65 according to EN 60529, SI-Protection (not possible for electronic Sensors) |
| Cable entry | Flextherm M20 for wire Ø=4,5..9 mm, removable |
| Electrical connection | removable plug-in terminal, max. 2,5 mm² |
| brass, spring loaded sensor | |
| Ambient condition | max. 85% rH short term condensation |
| Mounting | along the pipe or sideways |
| Notes | other temperature sensors on request |