---
title: Gas Sample Probes (SP-200 and SP-300)
url: https://www.sarveshanalytics.com/sample-probes.html
description: SP-200 non-heated and SP-300 heated sample probes with separate blowback line and SS316 sintered filter. Probe materials to Hastelloy and ceramic.
updated: 2026-11-02
source: html
---

Sample extraction

# Gas sample probes: SP-100, SP-200 and heated SP-300

Representative samples from hot, dusty and wet process gas. Separate sample and blowback lines clean the filter properly, and a non-return valve removes the need for a heated valve in the sample line. Probe tubes in SS316, Inconel 625 and ceramic cover process temperatures up to 1400 °C.

- ISO 9001:2015, certified by TÜV
- Designed and built in Pune since 2002
- Supplied to Reliance, Tata Steel, Indian Oil, Linde and ISRO

 Quick answer

SP-100 is a simple probe, SP-200 adds a separate blowback line with an unheated filter, and SP-300 has a heated filter. Materials are SS316 to 550 C, Inconel 625 to 1100 C, ceramic to 1400 C and PTFE to 180 C, with a 2 inch ANSI connection.

Updated 2 November 2026 · Figures from Sarvesh datasheets

## Why Sample probes SP-100, SP-200 and SP-300

### Blowback that cleans

A separate 1/2 inch blowback line delivers a high flow of air back through the filter, with a blowback solenoid valve as standard on SP-300.

### No cold spots

The SP-300 filter sits just outside the stack and is heated evenly with 50 W, for samples with up to 15 % moisture.

### Built for the process

Probe tubes in SS316 to 550 °C, Inconel 625 to 1100 °C or ceramic to 1400 °C, with a 10 micron sintered SS316 filter.

## Specifications

| Item | Specification | Notes |
|---|---|---|
| SP-100 | Simple probe, with or without in-situ filter at the tip |  |
| SP-200 | Probe with blowback, unheated filter |  |
| SP-300 | Probe with heated filter |  |
| SS 316 | Suitable up to 550 C |  |
| Inconel 625 | Suitable up to 1100 C |  |
| Ceramic | Suitable up to 1400 C |  |
| PTFE | Suitable up to 180 C |  |
| Process connection | 2 or 4 inch ANSI 150#, SS316, with bolts and gasket | Sample port 1/4 inch OD; blowback port 1/2 inch OD; optional calibration port 1/4 inch OD |
| SP-300 sample | 120 to 500 C; dust up to 10 g/Nm3; moisture up to 15 % |  |
| SP-300 design | 10 kg/cm2 and 180 C maximum; blowback 4 to 7 kg/cm2 | Wetted parts SS316, PTFE, Viton |
| SP-300 filter | SS316 sintered, 10 micron, ex-situ and evenly heated | Heater 50 W; no cold spots |
| Insertion length | 500, 1000 or 1500 mm | 1500 mm not in ceramic |
| SP-100 dust load | Up to 10 gm/Nm3 for SS |  |

From the current Sarvesh product datasheets and company profile. Specifications may change without notice as products improve. The final responsibility to check that a product meets the process and analyser requirement remains with the customer.

## Key features

- Filter element in SS 316, Hastelloy, Monel or PTFE; protector for abrasive gas
- SP-200 and SP-300: separate sample and blowback lines; 1/2 inch blowback line for efficient cleaning
- Non-return valve in the sample line removes the need for a heated solenoid or air-operated valve
- SS 316 sintered filter for long life and easy cleaning
- SP-300 filter is heated and sits just outside the stack; blowback solenoid valve standard; optional blowback tank
- Various pressure ratings available on SP-100

## How it works

The probe is the first component of a sampling system and the first to fail in dirty gas. A filter at the tip keeps dust out of the line, but the filter then clogs, so probes for dusty or tarry gas have a blowback line that sends clean air back through the filter. i-Cons and SGI-320 time and trigger the blowback.

Choose the material from the gas temperature and corrosiveness. For gas above the dew point of its condensables, a heated filter such as SP-300 keeps tar and acid from forming at the filter. SP-200 suits low dew point samples.

## On site: utilities and calibration gases

What to have ready at your plant before installation and commissioning.

| Item | Requirement | Notes |
|---|---|---|
| Heater power, SP-300 | 230 V AC, 50 Hz, 50 W |  |
| Blowback valve, SP-300 | 230 V AC solenoid valve, supplied |  |
| Blowback air | 4 to 7 kg/cm² | Through the separate 1/2 inch blowback port |
| Process connection | 2 or 4 inch ANSI 150# flange |  |

## Selection guidance

Use SP-100 for simple, clean or moderately dusty gas, SP-200 for dusty gas with a low dew point, and SP-300 for gas with a high dew point. Where removal under pressure is needed, see the retractable probe.

## Applications

Application pages where this is part of the recommended solution:

- [Stack and emission monitoring](https://www.sarveshanalytics.com/applications/stack-and-emission-monitoring-system.html)
- [Steel plant process gases](https://www.sarveshanalytics.com/applications/steel-plant-process-gas-analysis.html)
- [Pyrolysis, gasification and syngas](https://www.sarveshanalytics.com/applications/pyrolysis-gasification-and-syngas.html)
- [Heat-treatment furnace atmosphere](https://www.sarveshanalytics.com/applications/heat-treatment-furnace-atmosphere.html)

## Compatible products

[

### i-Cons

Smart Peltier sample conditioner with diagnostics, auto blowback and Modbus, in a compact 19 inch cabinet. View i-Cons

](https://www.sarveshanalytics.com/smart-systems-for-gas-analyser.html)[

### SGI-300 / SGI-320

Peltier sample cooler with integrated pump, filter and condensate detector; SGI-320 for emission monitoring. View SGI-300 / SGI-320

](https://www.sarveshanalytics.com/sample-coolers.html)[

### ACCURRA-S

Online analyser for trace, percent and purity O2, CO, CO2, CH4 and dew point; can measure two gases from one sample. View ACCURRA-S

](https://www.sarveshanalytics.com/safe-gas-analyser.html)[

### ACCURRA-Zr

Zirconia percent O2 analyser for furnaces and boilers, single-point air calibration, options to 1400 C. View ACCURRA-Zr

](https://www.sarveshanalytics.com/flue-gas-analysers.html)

## Frequently asked questions

**Which probe material for 1000 C gas?**

Inconel 625 is suitable up to 1100 C and ceramic up to 1400 C.

**How is the filter cleaned?**

By blowback through a separate 1/2 inch line, on a timer or automatically on flow failure when used with i-Cons.

**What is the standard connection?**

A 2 or 4 inch ANSI 150# process flange, a 1/4 inch OD sample port and a 1/2 inch OD blowback port.

**What dust load can SP-100 take?**

Up to 10 gm/Nm3 for SS.

## Related pages

- [Sampling components and systems](https://www.sarveshanalytics.com/sampling-components.html)
- [SGI-300](https://www.sarveshanalytics.com/sample-coolers.html)
- [i-Cons and SGI-320](https://www.sarveshanalytics.com/smart-systems-for-gas-analyser.html)
- [SRP-400 retractable sample probe](https://www.sarveshanalytics.com/retractable-sample-probe.html)
- [Sample vaporisers SV-200 and SV-400](https://www.sarveshanalytics.com/sample-vaporisers.html)
- [Headline filters](https://www.sarveshanalytics.com/headline-filters.html)
- [Engineered analyser panels](https://www.sarveshanalytics.com/analyser-sampling-panels.html)
- [**Browse all gas analysers**](https://www.sarveshanalytics.com/gas-analyser.html)