System Overview
Typical installation: electrodes → amplifier → data logger
ELIT signal amplifiers buffer and amplify the high-impedance mV output from pH, ORP and ion-selective electrodes, enabling reliable transmission over cable runs of up to 50 metres to data acquisition systems, PLCs and instruments.
Three models are available: a compact battery-powered single-channel unit for field use, and two laboratory 4-channel units — with or without galvanic isolation between channels.
Model Comparison
| Model | Type | Input | Output | Gain | Power | Isolation | Max Distance | Price (exc. VAT) |
|---|---|---|---|---|---|---|---|---|
| TRA-IS1-B | Battery, single-channel | pH / ORP / Ion (mV) | mV, 1:1 or 1:5 | 1× or 5× | 2 × CR2032, ~3 yr | No | 50 m | |
| LAB-EA4-C | 4-channel | pH / ORP / Ion (mV) | mV, 1:2 | 2× | 12 V DC | No (common ground) | 50 m | |
| LAB-EA4-CI | 4-channel, isolated | pH / ORP / Ion (mV) | mV, 1:2 | 2× | 12 V DC | Yes (galvanic) | 50 m |
TRA-IS1-B — Battery-Powered Single-Channel Amplifier
TRA-IS1-B
Connector / output diagram
| Parameter | Value |
|---|---|
| Dimensions | 100 × 70 × 50 mm + 15 mm flanges |
| Mounting | 4 × 5 mm drill holes, 115 × 42 mm pattern |
| Enclosure | ABS, IP52 (NEMA 2/3) |
| Net Weight | 165 g (with batteries) |
| Input Connector | BNC (50 Ω) |
| Output Connector | BNC (50 Ω) |
| Reference Socket | 2 mm |
| Power | 2 × CR2032 Li-Mn, ~3-year life |
| Input Impedance | 1 TΩ typical |
| Input Bias Current | 0.1 pA typical |
| Transfer (Jp1 OPEN) | 1:1 — unity gain |
| Transfer (Jp1 CLOSED) | 1:5 — ±400 mV → ±2000 mV |
| Load Resistance | ≥ 250 kΩ |
Gain is selected via jumper Jp1: leave open for 1:1 (unity), close for 1:5 (5× amplification, ±400 mV in → ±2000 mV out). Suitable for field or portable use — no mains power required.
LAB-EA4-C — 4-Channel Laboratory Amplifier
LAB-EA4-C
| Parameter | Value |
|---|---|
| Channels | 4 × BNC inputs |
| Output Connector | 25-way sub-D |
| Transfer | ±1500 mV in → ±3000 mV out (1:2 gain) |
| Enclosure | ABS, 190 × 135 × 40 mm, IP60 |
| Power | 12 V DC stabilised, 300 mA |
| Isolation | None — common ground all 4 channels |
| BNC Casings | All connected to common ground |
Non-isolated: All inputs, outputs and BNC casings share a common ground. Use only when: (a) all electrodes are in a single vessel with one reference, or (b) electrodes are in separate vessels with no electrical connection between solutions. If ground loops are a concern, use the LAB-EA4-CI.
LAB-EA4-CI — 4-Channel Isolated Laboratory Amplifier
LAB-EA4-CI
Isolated channel architecture
| Parameter | Value |
|---|---|
| Channels | 4 × fully galvanically isolated |
| Dimensions | Same as LAB-EA4-C |
| Transfer | ±1500 mV in → ±3000 mV out (1:2 gain) |
| Power | 12 V DC stabilised |
| Isolation | Galvanic — each channel has its own GND |
| Ground Loops | Eliminated |
Fully isolated: Each channel ground is independent, eliminating ground loops. For best results, configure your data acquisition system in "Differential Input" or "Isolated Inputs" mode. Suitable for 4 electrodes in 4 separate vessels, or 4 electrodes in a single vessel.
Ordering & Further Information
Order direct at elyxir.co.uk/products · View full signal conditioning range