| Part Number: | ELH101 | - | 3 | A4 | A4 | 1 | 1 |
|---|---|---|---|---|---|---|---|
| Explanation: |
Mounting model ELH101 - Wall-mounted transmitter |
Accuracy grade 2 - ±2%RH and ±0.3°C |
Humidity output V10 - 0–10VDC, three-wire |
Temperature output V10 - 0–10VDC, three-wire |
Temperature range 0 - No analog range selection; required for temperature outputs other than V10 or A4 |
Display 0 - No display |
ELH transmitters combine relative-humidity sensing with temperature measurement for HVAC, clean rooms, laboratories, greenhouses, warehouses and industrial environmental monitoring. Select a wall-mounted, duct-mounted or split-probe arrangement to place the sensing element where it can sample representative air.
Output choices include RS485/Modbus, 0–10VDC and 4–20mA. Passive temperature-element options are also available. An optional LCD shows temperature, humidity and units; current-output versions use a display without backlighting.
| Model | Installation | Reference dimensions |
|---|---|---|
| ELH101 | Wall-mounted enclosure and integral probe | 100×80×46mm enclosure; 160mm overall height; Ø15mm probe |
| ELH102 | Duct-mounted probe with adjustable flange | 200mm probe projection; Ø15mm probe; 46mm case depth |
| ELH103 | Separate enclosure and remote probe | 100mm enclosure width, 46mm depth; 413mm reference probe assembly |
| Parameter | Specification |
|---|---|
| Humidity sensor | Digital |
| Humidity range | 0–100%RH configurations; 10–95%RH instrument configurations also available |
| Humidity accuracy | ±2%RH or ±3%RH grade at 25°C; the ±3%RH specification is qualified over 20–80%RH |
| Humidity response | ≤10s at 25°C in slowly flowing air |
| Temperature range | 0–50°C, -20°C to 60°C or a specified custom range |
| Digital temperature accuracy | ±0.3°C from 5°C to 60°C |
| Passive temperature accuracy | ±0.2°C or ±0.4°C at 25°C, according to element type |
| Operating environment | -20°C to 60°C; 5–95%RH, noncondensing |
| Enclosure | ABS or PC construction according to configuration |
| Probe and filter | PC probe with polymer filter; optional stainless steel probe with sintered or mesh filter |
| Protection | IP65 with enclosure and cable-entry seals installed |
| Output configuration | Supply and load |
|---|---|
| Voltage / RS485 family | 15–35VDC or 24VAC ±20%; the ELH101 PC-enclosure configuration specifies 15–32VDC |
| 500Ω current-output configuration | 18.5–35VDC at RL=500Ω; 8.5–35VDC at RL=0Ω; maximum load 500Ω |
| Voltage-output load | At least 2kΩ |
| AC-powered RS485 | Use an isolated 24VAC supply |
Match the ordered output module to its supply and load rating. The humidity current loop powers the current-output instrument and must remain connected, even when only temperature is monitored.
| Output | Terminal order, left to right |
|---|---|
| RS485 | B, A, GND, V+, PGND |
| 0–10V | T, RH, GND, V+, PGND |
| 4–20mA | T, V+, RH |
| Passive temperature element | R+, R− |
T identifies temperature and RH identifies humidity. Use the diagram for the supplied output configuration. For current output, connect V+ to supply positive and route each output through its receiving input to supply negative, keeping the RH loop active.
The supported example ELH101-3A4A411 specifies wall mounting, ±3%RH / ±0.3°C grade, humidity and temperature 4–20mA outputs, a 0–50°C temperature span and an LCD. Temperature range codes 1, 2 or 8 apply only to V10 or A4 temperature outputs; other temperature-output choices use range code 0.
Mount wall enclosures vertically with the probe downward, away from local heat/cold sources, direct sunlight and rain. Use the flange to set duct-probe insertion depth and seal the finished opening against air leakage. Check the actual mounting pattern before drilling and preserve the cover gasket and cable-gland seals when closing the enclosure.
The English manual includes the full selection table, terminal diagrams, temperature-accuracy curve, dimensions and installation procedure.
